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/*******************************************************************************
* configs/hn70ap/src/stm32_spi.c
*
* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <gnutt@nuttx.org>
* Marco Krahl <ocram.lhark@gmail.com>
*
* 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 <errno.h>
#include <debug.h>
#include <nuttx/spi/spi.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "chip.h"
#include "stm32.h"
#include "hn70ap.h"
/*******************************************************************************
* Private Data
******************************************************************************/
/*******************************************************************************
* Public Functions
******************************************************************************/
/*******************************************************************************
* Name: stm32_spidev_initialize
*
* Description:
* Called to configure SPI chip select GPIO pins for the hn70ap board.
*
******************************************************************************/
{
#if defined(CONFIG_STM32_SPI2) && defined(CONFIG_MTD_SST26)
stm32_configgpio(GPIO_CS_SST26); /* SST26 FLASH chip select */
#endif
#if defined(CONFIG_STM32_SPI4) && defined(CONFIG_DRIVERS_GENERICRADIO)
stm32_configgpio(GPIO_CS_RADIOMAIN); /* On-board si4463 */
stm32_configgpio(GPIO_CS_RADIOAUX); /* Radio module */
#endif
}
/****************************************************************************
* Name: stm32_spi1/2/3/4/5select and stm32_spi1/2/3/4/5status
*
* 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_SPI2
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");
#if defined(CONFIG_MTD_SST26)
if (devid == SPIDEV_FLASH(0))
{
stm32_gpiowrite(GPIO_CS_SST26, !selected);
}
#endif
}
uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
#ifdef CONFIG_STM32_SPI4
void stm32_spi4select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
{
// spiinfo("devid: %08X CS: %s\n", devid, selected ? "assert" : "de-assert");
#ifdef CONFIG_DRIVERS_GENERICRADIO
{
else if (devid == SPIDEV_GENRADIO(1))
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}
#endif
}
uint8_t stm32_spi4status(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif
/****************************************************************************
* Name: stm32_spi1cmddata
*
* Description:
* Set or clear the SH1101A A0 or SD1306 D/C n bit to select data (true)
* or command (false). This function must be provided by platform-specific
* logic. This is an implementation of the cmddata method of the SPI
* interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
*
* Input Parameters:
*
* spi - SPI device that controls the bus the device that requires the CMD/
* DATA selection.
* devid - If there are multiple devices on the bus, this selects which one
* to select cmd or data. NOTE: This design restricts, for example,
* one one SPI display per SPI bus.
* cmd - true: select command; false: select data
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_SPI_CMDDATA
#ifdef CONFIG_STM32_SPI2
int stm32_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return -ENODEV;
}
#endif
#ifdef CONFIG_STM32_SPI4
int stm32_spi4cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
return -ENODEV;
}
#endif
#endif /* CONFIG_SPI_CMDDATA */