text: /****************************************************************************
   * boards/arm/kinetis/freedom-k66f/src/k66_spi.c
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the
   * License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <assert.h>
  #include <debug.h>
  
  #include <nuttx/spi/spi.h>
  #include <arch/board/board.h>
  
  #include "arm_arch.h"
  #include "chip.h"
  #include "kinetis.h"
  #include "freedom-k66f.h"
  
  #if defined(CONFIG_KINETIS_SPI0) || defined(CONFIG_KINETIS_SPI1) || \
      defined(CONFIG_KINETIS_SPI2)
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: k66_spidev_initialize
   *
   * Description:
   *   Called to configure SPI chip select GPIO pins for the FREEDOM-K66F
   *   board.
   *
   ****************************************************************************/
  
  void weak_function k66_spidev_initialize(void)
  {
    /* Initialize the CE CS pins on J6 RF/WIFI connector */
  
    kinetis_pinconfig(PIN_CE);
    kinetis_pinconfig(PIN_SPI1_PCS0);
  }
  
  /****************************************************************************
   * Name:  kinetis_spi[n]select, kinetis_spi[n]status, and
   *        kinetis_spi[n]cmddata
   *
   * Description:
   *   These external functions must be provided by board-specific logic.
   *   They 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 kinetis_spibus_initialize()) are provided
   *   by common Kinetis logic.
   *   To use this common SPI logic on your board:
   *
   *   1. Provide logic in kinetis_boardinitialize() to configure SPI chip
   *      select pins.
   *   2. Provide kinetis_spi[n]select() and kinetis_spi[n]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.
   *   2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
   *      kinetis_spi[n]cmddata() functions in your board-specific logic.
   *      These functions will perform cmd/data selection operations using
   *      GPIOs in the way your board is configured.
   *   3. Add a call to kinetis_spibus_initialize() in your low level
   *      application initialization logic
   *   4. The handle returned by kinetis_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_KINETIS_SPI0
  void kinetis_spi0select(FAR struct spi_dev_s *dev, uint32_t devid,
                          bool selected)
  {
    spiinfo("devid: %d CS: %s\n", (int)devid,
            selected ? "assert" : "de-assert");
  # warning "Missing logic"
  }
  
  uint8_t kinetis_spi0status(FAR struct spi_dev_s *dev, uint32_t devid)
  {
  # warning "Missing logic"
    return SPI_STATUS_PRESENT;
  }
  #endif
  
  #ifdef CONFIG_KINETIS_SPI1
  void kinetis_spi1select(FAR struct spi_dev_s *dev, uint32_t devid,
                          bool selected)
  {
    spiinfo("devid: %d CS: %s\n", (int)devid,
            selected ? "assert" : "de-assert");
    kinetis_gpiowrite(PIN_SPI1_PCS0, !selected);
  }
  
  uint8_t kinetis_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
  {
  # warning "Missing logic"
    return SPI_STATUS_PRESENT;
  }
  #endif
  
  #ifdef CONFIG_KINETIS_SPI2
  void kinetis_spi2select(FAR struct spi_dev_s *dev, uint32_t devid,
                          bool selected)
  {
    spiinfo("devid: %d CS: %s\n", (int)devid,
            selected ? "assert" : "de-assert");
  # warning "Missing logic"
  }
  
  uint8_t kinetis_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
  {
  # warning "Missing logic"
    return SPI_STATUS_PRESENT;
  }
  #endif
  
  #endif /* CONFIG_KINETIS_SPI0 || CONFIG_KINETIS_SPI1 || CONFIG_KINETIS_SPI2 */
  