/************************************************************************************ * arch/arm/src/imx/imx_cspi.h * * Copyright (C) 2009 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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_IMX_CSPI_H #define __ARCH_ARM_IMX_CSPI_H /************************************************************************************ * Included Files ************************************************************************************/ /************************************************************************************ * Definitions ************************************************************************************/ /* CSPI Register Offsets ************************************************************/ #define CSPI_SPIRXD_OFFSET 0x0000 #define CSPI_SPITXD_OFFSET 0x0004 #define CSPI_SPICONT1_OFFSET 0x0008 #define CSPI_INTCS_OFFSET 0x000c #define CSPI_SPITEST_OFFSET 0x0010 #define CSPI_SPISPCR_OFFSET 0x0014 #define CSPI_SPIDMA_OFFSET 0x0018 #define CSPI_SPIRESET_OFFSET 0x001c /* CSPI Register Addresses **********************************************************/ /* CSPI1 */ #define IMX_CSPI1_SPIRXD (IMX_CSPI1_VBASE + CSPI_SPIRXD_OFFSET) #define IMX_CSPI1_SPITXD (IMX_CSPI1_VBASE + CSPI_SPITXD_OFFSET) #define IMX_CSPI1_SPICONT1 (IMX_CSPI1_VBASE + CSPI_SPICONT1_OFFSET) #define IMX_CSPI1_INTCS (IMX_CSPI1_VBASE + CSPI_INTCS_OFFSET) #define IMX_CSPI1_SPITEST (IMX_CSPI1_VBASE + CSPI_SPITEST_OFFSET) #define IMX_CSPI1_SPISPCR (IMX_CSPI1_VBASE + CSPI_SPISPCR_OFFSET) #define IMX_CSPI1_SPIDMA (IMX_CSPI1_VBASE + CSPI_SPIDMA_OFFSET) #define IMX_CSPI1_SPIRESET (IMX_CSPI1_VBASE + CSPI_SPIRESET_OFFSET) /* CSPI1 */ #define IMX_CSPI2_SPIRXD (IMX_CSPI2_VBASE + CSPI_SPIRXD_OFFSET) #define IMX_CSPI2_SPITXD (IMX_CSPI2_VBASE + CSPI_SPITXD_OFFSET) #define IMX_CSPI2_SPICONT1 (IMX_CSPI2_VBASE + CSPI_SPICONT1_OFFSET) #define IMX_CSPI2_INTCS (IMX_CSPI2_VBASE + CSPI_INTCS_OFFSET) #define IMX_CSPI2_SPITEST (IMX_CSPI2_VBASE + CSPI_SPITEST_OFFSET) #define IMX_CSPI2_SPISPCR (IMX_CSPI2_VBASE + CSPI_SPISPCR_OFFSET) #define IMX_CSPI2_SPIDMA (IMX_CSPI2_VBASE + CSPI_SPIDMA_OFFSET) #define IMX_CSPI2_SPIRESET (IMX_CSPI2_VBASE + CSPI_SPIRESET_OFFSET) /* CSPI Register Bit Definitions ****************************************************/ /************************************************************************************ * Inline Functions ************************************************************************************/ /************************************************************************************ * Public Data ************************************************************************************/ #ifndef __ASSEMBLY__ #ifdef __cplusplus #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /* __cplusplus */ /************************************************************************************ * Public Functions ************************************************************************************/ /* The external functions, imx_spiselect and imx_spistatus must be provided by * board-specific logic. The are implementations of the select and status methods * SPI interface defined by struct spi_ops_s (see include/nuttx/spi.h). All other * methods (including up_spiinitialize()) are provided by common logic. To use this * common SPI logic on your board: * * 1. Provide imx_spiselect() and imx_spistatus() functions in your board-specific * logic. This function will perform chip selection and status operations using * GPIOs in the way your board is configured. * 2. Add a call to up_spiinitialize() in your low level initialization logic * 3. 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). */ EXTERN void imx_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, boolean selected); EXTERN ubyte imx_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid); #undef EXTERN #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __ASSEMBLY__ */ #endif /* __ARCH_ARM_IMX_CSPI_H */