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/************************************************************************************
* arch/arm/src/imx/imx_cspi.h
*
* 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.
*
************************************************************************************/
#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 */
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