137 lines
4.2 KiB
C
137 lines
4.2 KiB
C
/****************************************************************************
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* arch/arm/include/cxd56xx/hostif.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_INCLUDE_CXD56XX_HOSTIF_H
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#define __ARCH_ARM_INCLUDE_CXD56XX_HOSTIF_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Host interface maximum number of buffers */
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#define MAX_BUFFER_NUM 32
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/* Host interface buffer attributes */
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#define HOSTIF_BUFF_ATTR_ADDR_OFFSET(n) (((n) & 0x3) << 4)
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/* 2 to the power of n */
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#define HOSTIF_BUFF_ATTR_FIXLEN (0 << 2) /* fixed length */
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#define HOSTIF_BUFF_ATTR_VARLEN (1 << 2) /* variable length */
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#define HOSTIF_BUFF_ATTR_WRITE (0 << 1) /* from target to host */
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#define HOSTIF_BUFF_ATTR_READ (1 << 1) /* from host to target */
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* Common buffer configuration */
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struct hostif_buff_s
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{
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uint16_t size;
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uint16_t flag;
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};
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/* I2C buffer configuration */
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struct hostif_i2cconf_s
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{
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int address; /* slave address */
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struct hostif_buff_s buff[MAX_BUFFER_NUM];
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};
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/* SPI buffer configuration */
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struct hostif_spiconf_s
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{
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struct hostif_buff_s buff[MAX_BUFFER_NUM];
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};
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: hostif_i2cinitialize
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*
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* Description:
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* Initialize the host interface for I2C slave
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*
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* Input Parameter:
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* config - pointer to I2C buffer configuration
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*
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* Returned Value:
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* Return 0 on success. Otherwise, return a negated errno.
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*
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****************************************************************************/
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int hostif_i2cinitialize(struct hostif_i2cconf_s *config);
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/****************************************************************************
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* Name: hostif_spiinitialize
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*
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* Description:
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* Initialize the host interface for SPI slave
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*
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* Input Parameter:
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* config - pointer to SPI buffer configuration
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*
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* Returned Value:
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* Return 0 on success. Otherwise, return a negated errno.
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*
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****************************************************************************/
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int hostif_spiinitialize(struct hostif_spiconf_s *config);
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/****************************************************************************
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* Name: hostif_uninitialize
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*
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* Description:
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* Uninitialize the host interface
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*
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* Returned Value:
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* Return 0 on success. Otherwise, return a negated errno.
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*
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****************************************************************************/
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int hostif_uninitialize(void);
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_INCLUDE_CXD56XX_HOSTIF_H */
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