diff options
Diffstat (limited to 'nuttx/configs/sam3u-ek/src/up_spi.c')
-rwxr-xr-x | nuttx/configs/sam3u-ek/src/up_spi.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/nuttx/configs/sam3u-ek/src/up_spi.c b/nuttx/configs/sam3u-ek/src/up_spi.c new file mode 100755 index 000000000..1b59f5c08 --- /dev/null +++ b/nuttx/configs/sam3u-ek/src/up_spi.c @@ -0,0 +1,160 @@ +/************************************************************************************ + * configs/sam3u-ek/src/up_spi.c + * arch/arm/src/board/up_spi.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "chip.h" +#include "sam3u_internal.h" +#include "sam3uek_internal.h" + +#if defined(CONFIG_SAM3U_SPI1) || defined(CONFIG_SAM3U_SPI2) || defined(CONFIG_SAM3U_SPI3) + +/************************************************************************************ + * 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: sam3u_spiinitialize + * + * Description: + * Called to configure SPI chip select GPIO pins for the SAM3U10E-EVAL board. + * + ************************************************************************************/ + +void weak_function sam3u_spiinitialize(void) +{ +} + +/**************************************************************************** + * Name: sam3u_spi1/2/3select and sam3u_spi1/2/3status + * + * Description: + * The external functions, sam3u_spi1/2/3select and sam3u_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.h). All other methods (including up_spiinitialize()) + * are provided by common SAM3U logic. To use this common SPI logic on your + * board: + * + * 1. Provide logic in sam3u_boardinitialize() to configure SPI chip select + * pins. + * 2. Provide sam3u_spi1/2/3select() and sam3u_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 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). + * + ****************************************************************************/ + +#ifdef CONFIG_SAM3U_SPI1 +void sam3u_spi1select(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"); +} + +uint8_t sam3u_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + return SPI_STATUS_PRESENT; +} +#endif + +#ifdef CONFIG_SAM3U_SPI2 +void sam3u_spi2select(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"); +} + +uint8_t sam3u_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + return SPI_STATUS_PRESENT; +} +#endif + +#ifdef CONFIG_SAM3U_SPI3 +void sam3u_spi3select(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"); +} + +uint8_t sam3u_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + return SPI_STATUS_PRESENT; +} +#endif + +#endif /* CONFIG_SAM3U_SPI1 || CONFIG_SAM3U_SPI2 || CONFIG_SAM3U_SPI3 */ |