c481a5b7ac
Gregory Nutt is the copyright holder for those files and he has submitted the SGA as a result we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/****************************************************************************
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* boards/arm/stm32/maple/src/stm32_spi.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/spi/spi.h>
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#include <arch/board/board.h>
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#include "arm_arch.h"
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#include "chip.h"
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#include "stm32.h"
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#include "maple.h"
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#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_spidev_initialize
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the maple board.
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*
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****************************************************************************/
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void weak_function stm32_spidev_initialize(void)
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{
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/* NOTE: Clocking for SPI1 and/or SPI2 was already provided in stm32_rcc.c.
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* Configurations of SPI pins is performed in stm32_spi.c.
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* Here, we only initialize chip select pins unique to the board
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* architecture.
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*/
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stm32_configgpio(GPIO_MEMLCD_CS);
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}
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/****************************************************************************
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* Name: stm32_spi1/2select and stm32_spi1/2status
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*
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* Description:
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* The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status
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* must be provided by board-specific logic. They are implementations of
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* the select and status methods of the SPI interface defined by struct
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* spi_ops_s (see include/nuttx/spi/spi.h). All other methods (including
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* stm32_spibus_initialize()) are provided by common STM32 logic.
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* To use this common SPI logic on your board:
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*
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* 1. Provide logic in stm32_boardinitialize() to configure SPI chip
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* select pins.
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* 2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() functions
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* in your board-specific logic. These functions will perform chip
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* selection and status operations using GPIOs in the way your board is
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* configured.
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* 3. Add a calls to stm32_spibus_initialize() in your low level
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* application initialization logic
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* 4. The handle returned by stm32_spibus_initialize() may then be used to
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* bind the SPI driver to higher level logic (e.g., calling
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* mmcsd_spislotinitialize(), for example, will bind the SPI driver to
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* the SPI MMC/SD driver).
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*
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****************************************************************************/
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#ifdef CONFIG_STM32_SPI1
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void stm32_spi1select(FAR struct spi_dev_s *dev, uint32_t devid,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n",
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(int)devid, selected ? "assert" : "de-assert");
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# if defined(CONFIG_LCD_SHARP_MEMLCD)
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if (devid == SPIDEV_DISPLAY(0))
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{
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stm32_gpiowrite(GPIO_MEMLCD_CS, selected);
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}
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# endif
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}
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uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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int stm32_spi1cmddata(FAR struct spi_dev_s *dev,
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uint32_t devid, bool cmd)
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{
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return -ENODEV;
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}
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#endif
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#ifdef CONFIG_STM32_SPI2
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void stm32_spi2select(FAR struct spi_dev_s *dev, uint32_t devid,
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bool selected)
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{
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}
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uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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int stm32_spi1cmddata(FAR struct spi_dev_s *dev,
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uint32_t devid, bool cmd)
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{
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return -ENODEV;
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}
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#endif
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#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */
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