nuttx/boards/arm/stm32/viewtool-stm32f107/src/stm32_spi.c

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/****************************************************************************
* boards/arm/stm32/viewtool-stm32f107/src/stm32_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 "arm_arch.h"
#include "chip.h"
#include "stm32.h"
#include "viewtool_stm32f107.h"
#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_spidev_initialize
*
* Description:
* Called to configure SPI chip select GPIO pins for the Viewtool stm32f103/107
* board.
*
****************************************************************************/
void weak_function stm32_spidev_initialize(void)
{
/* NOTE: Clocking for SPIx was already provided in stm32_rcc.c.
* Configurations of SPI pins is performed in stm32_spi.c.
* Here, we only initialize chip select pins unique to the board
* architecture.
*/
#if defined(CONFIG_STM32_SPI2) && defined(CONFIG_INPUT_ADS7843E)
/* Configure the XPT2046 SPI2 CS pin as an output */
stm32_configgpio(GPIO_LCDTP_CS);
#endif
#if defined(CONFIG_STM32_SPI3) && defined(CONFIG_SENSORS_MPL115A)
/* Configure the MPL115A SPI3 CS pin as an output */
stm32_configgpio(GPIO_MPL115A_CS);
#endif
#if defined(CONFIG_VIEWTOOL_FT80X_SPI1) || defined(CONFIG_VIEWTOOL_FT80X_SPI2)
/* Configure the FT80x CS pin as an input */
stm32_configgpio(GPIO_FT80X_CS);
#endif
#if defined(CONFIG_VIEWTOOL_MAX3421E_SPI1) || defined(CONFIG_VIEWTOOL_MAX3421E_SPI2)
/* Configure the MAX3421E CS pin as an input */
stm32_configgpio(GPIO_MAX3421E_CS);
#endif
}
/****************************************************************************
* Name: stm32_spi1/2/3select and stm32_spi1/2/3status
*
* Description:
* The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status 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 stm32_spibus_initialize())
* are provided by common STM32 logic. To use this common SPI logic on your
* board:
*
* 1. Provide logic in stm32_boardinitialize() to configure SPI chip select
* pins.
* 2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() 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 stm32_spibus_initialize() in your low level application
* initialization logic
* 4. The handle returned by stm32_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_STM32_SPI1
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void stm32_spi1select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
{
spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
#ifdef CONFIG_VIEWTOOL_FT80X_SPI1
/* Select/de-select the FT80x */
if (devid == SPIDEV_DISPLAY(0))
{
stm32_gpiowrite(GPIO_FT80X_CS, !selected);
}
else
#endif
#ifdef CONFIG_VIEWTOOL_MAX3421E_SPI1
/* Select/de-select the MAX3421E */
if (devid == SPIDEV_USBHOST(0))
{
stm32_gpiowrite(GPIO_MAX3421E_CS, !selected);
}
else
#endif
{
spierr("ERROR: Unrecognized devid: %08lx\n", (unsigned long)devid);
}
}
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uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef CONFIG_STM32_SPI2
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void stm32_spi2select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
{
spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
#ifdef CONFIG_INPUT_ADS7843E
/* Select/de-select the touchscreen */
if (devid == SPIDEV_TOUCHSCREEN(0))
{
stm32_gpiowrite(GPIO_LCDTP_CS, !selected);
}
else
#endif
#ifdef CONFIG_VIEWTOOL_FT80X_SPI2
/* Select/de-select the FT80x */
if (devid == SPIDEV_DISPLAY(0))
{
stm32_gpiowrite(GPIO_FT80X_CS, !selected);
}
else
#endif
#ifdef CONFIG_VIEWTOOL_MAX3421E_SPI2
/* Select/de-select the MAX3421E */
if (devid == SPIDEV_USBHOST(0))
{
stm32_gpiowrite(GPIO_MAX3421E_CS, !selected);
}
else
#endif
{
spierr("ERROR: Unrecognized devid: %08lx\n", (unsigned long)devid);
}
}
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uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef CONFIG_STM32_SPI3
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void stm32_spi3select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
{
spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
}
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uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 || CONFIG_STM32_SPI3*/