/************************************************************************************
 * arch/arm/src/kl/kl_gpio.h
 *
 *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * 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_KL_KL_SPI_H
#define __ARCH_ARM_SRC_KL_KL_SPI_H

/************************************************************************************
 * Included Files
 ************************************************************************************/

#include <nuttx/config.h>

#if defined(CONFIG_KL_SPI0) || defined(CONFIG_KL_SPI1)

/************************************************************************************
 * Pre-processor Declarations
 ************************************************************************************/

/************************************************************************************
 * Public Data
 ************************************************************************************/

#ifndef __ASSEMBLY__

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif

/************************************************************************************
 * Public Function Prototypes
 ************************************************************************************/

/************************************************************************************
 * Name: up_spiinitialize
 *
 * Description:
 *   Initialize the selected SPI port.
 *
 * Input Parameter:
 *   Port number (for hardware that has mutiple SPI interfaces)
 *
 * Returned Value:
 *   Valid SPI device structure reference on succcess; a NULL on failure
 *
 ************************************************************************************/

struct spi_dev_s;
FAR struct spi_dev_s *up_spiinitialize(int port);

/************************************************************************************
 * Name:  kl_spi[n]select, kl_spi[n]status, and kl_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.h). All other methods
 *   including up_spiinitialize()) are provided by common Kinetis logic.  To use
 *   this common SPI logic on your board:
 *
 *   1. Provide logic in kl_boardinitialize() to configure SPI chip select
 *      pins.
 *   2. Provide kl_spi[n]select() and kl_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
 *      kl_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 up_spiinitialize() in your low level application
 *      initialization logic
 *   4. The handle returned by up_spiinitialize() 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).
 *
 ************************************************************************************/

enum spi_dev_e;

#ifdef CONFIG_KL_SPI0
void  kl_spi0select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
uint8_t kl_spi0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
#ifdef CONFIG_SPI_CMDDATA
int kl_spi0cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
#endif
#endif

#ifdef CONFIG_KL_SPI1
void  kl_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
uint8_t kl_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
#ifdef CONFIG_SPI_CMDDATA
int kl_spi1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
#endif
#endif

#endif /* __ASSEMBLY__ */
#endif /* CONFIG_KL_SPI0 || CONFIG_KL_SPI1 */
#endif /* __ARCH_ARM_SRC_KL_KL_SPI_H */