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fernvale_spi.c
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fernvale_spi.c
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/******************************************************************************
* configs/kosagi-fernvale/src/fernvale_spi.c
*
* 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.
*
******************************************************************************/
/******************************************************************************
* Included Files
******************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <debug.h>
#include <nuttx/spi/spi.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "chip.h"
#include "fernvale_internal.h"
#include "fernvale_h3131.h"
#ifdef CONFIG_FERNVALE_SPI
#if 0 /* At present, LPC-H3131 specific logic is hard-coded in the file fernvale_spi.c
* in arch/arm/src/fernvalexx */
/******************************************************************************
* Definitions
******************************************************************************/
/* Enables debug output from this file (needs CONFIG_DEBUG too) */
#undef SPI_DEBUG /* Define to enable debug */
#undef SPI_VERBOSE /* Define to enable verbose debug */
#ifdef SPI_DEBUG
# define spidbg lldbg
# ifdef SPI_VERBOSE
# define spivdbg lldbg
# else
# define spivdbg(x...)
# endif
#else
# undef SPI_VERBOSE
# define spidbg(x...)
# define spivdbg(x...)
#endif
/******************************************************************************
* Private Functions
******************************************************************************/
/******************************************************************************
* Public Functions
******************************************************************************/
/******************************************************************************
* Name: fernvale_spiinitialize
*
* Description:
* Called to configure SPI chip select GPIO pins for the LPC-H3131 board.
*
******************************************************************************/
void weak_function fernvale_spiinitialize(void)
{
/* NOTE: Clocking for SPI has already been provided. Pin configuration is performed
* on-the-fly, so no additional setup is required.
*/
}
/******************************************************************************
* Name: fernvale_spiselect and fernvale_spistatus
*
* Description:
* The external functions, fernvale_spiselect and fernvale_spistatus 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 up_spiinitialize())
* are provided by common FERNVALEXX logic. To use this common SPI logic on your
* board:
*
* 1. Provide logic in fernvale_boardinitialize() to configure SPI chip select
* pins.
* 2. Provide fernvale_spiselect() and fernvale_spistatus() 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 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).
*
******************************************************************************/
void fernvale_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
{
spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
#warning "Missing logic"
}
uint8_t fernvale_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
{
return SPI_STATUS_PRESENT;
}
#endif /* 0 */
#endif /* CONFIG_FERNVALE_SPI */