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/**
* @file
*
* @ingroup mpc55xx_dspi
*
* @brief Header file for the LibI2C bus driver for the Deserial Serial Peripheral Interface (DSPI).
*/
/*
* Copyright (c) 2008
* Embedded Brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* rtems@embedded-brains.de
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
/**
* @defgroup mpc55xx_dspi Deserial Serial Peripheral Interface (DSPI)
*
* @ingroup RTEMSBSPsPowerPCMPC55XX
*/
#ifndef LIBCPU_POWERPC_MPC55XX_DSPI_H
#define LIBCPU_POWERPC_MPC55XX_DSPI_H
#include <rtems/libi2c.h>
#include <mpc55xx/edma.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
struct DSPI_tag;
typedef struct {
edma_channel_context edma;
rtems_id id;
} mpc55xx_dspi_edma_entry;
/**
* @brief LibI2C bus driver entry.
*/
typedef struct {
/**
* @brief Standard bus driver fields.
*/
rtems_libi2c_bus_t bus;
/**
* @brief Index in the bus table: @ref mpc55xx_dspi_bus_table.
*/
unsigned table_index;
/**
* @brief Bus number (available after rtems_libi2c_register_bus()).
*
* @note You must set it in the initialization code after the bus registration.
*/
unsigned bus_number;
/**
* @brief Hardware registers.
*/
volatile struct DSPI_tag *regs;
/**
* @brief Selects SPI master or slave mode.
*/
bool master;
/**
* @brief Data for the Push Register.
*/
union DSPI_PUSHR_tag push_data;
/**
* @brief eDMA entry for transmission.
*
* The channel is fixed to a particular DSPI.
*/
mpc55xx_dspi_edma_entry edma_transmit;
/**
* @brief eDMA entry for push data generation.
*
* You can choose every available channel.
*/
mpc55xx_dspi_edma_entry edma_push;
/**
* @brief eDMA entry for receiving.
*
* The channel is fixed to a particular DSPI.
*/
mpc55xx_dspi_edma_entry edma_receive;
/**
* @brief Idle character transmitted in read only mode.
*/
uint32_t idle_char;
/**
* @brief Current baud.
*/
uint32_t baud;
} mpc55xx_dspi_bus_entry;
/**
* @brief Number of DSPIs.
*/
#define MPC55XX_DSPI_NUMBER 4
/**
* @brief Table with bus driver entries.
*/
extern mpc55xx_dspi_bus_entry mpc55xx_dspi_bus_table [ /* MPC55XX_DSPI_NUMBER */ ];
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBCPU_POWERPC_MPC55XX_DSPI_H */
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