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/*
* RTEMS support for MPC83xx
*
* This file contains the MPC83xx SPI driver declarations.
* NOTE: This driver has the same API as a I2C driver.
*/
/*
* Copyright (c) 2007 embedded brains GmbH. All rights reserved.
*
* 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.
*/
#ifndef _MPC83XX_SPIDRV_H
#define _MPC83XX_SPIDRV_H
#include <mpc83xx/mpc83xx.h>
#include <rtems/libi2c.h>
#include <rtems/irq.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct mpc83xx_spi_softc {
m83xxSPIRegisters_t *reg_ptr;
int initialized;
rtems_irq_number irq_number;
uint32_t base_frq; /* input frq for baud rate divider */
rtems_id irq_sema_id;
uint32_t curr_addr; /* current spi address */
uint32_t idle_char;
uint8_t bytes_per_char;
uint8_t bit_shift;
} mpc83xx_spi_softc_t ;
typedef struct {
rtems_libi2c_bus_t bus_desc;
mpc83xx_spi_softc_t softc;
} mpc83xx_spi_desc_t;
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code mpc83xx_spi_init
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| initialize the driver |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_libi2c_bus_t *bh /* bus specifier structure */
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| o = ok or error code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
int mpc83xx_spi_read_write_bytes
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| transmit/receive some bytes from SPI device |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_libi2c_bus_t *bh, /* bus specifier structure */
unsigned char *rbuf, /* buffer to store bytes */
const unsigned char *tbuf, /* buffer to send bytes */
int len /* number of bytes to transceive */
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| number of bytes received or (negative) error code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
int mpc83xx_spi_read_bytes
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| receive some bytes from SPI device |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_libi2c_bus_t *bh, /* bus specifier structure */
unsigned char *buf, /* buffer to store bytes */
int len /* number of bytes to receive */
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| number of bytes received or (negative) error code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
int mpc83xx_spi_write_bytes
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| send some bytes to SPI device |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_libi2c_bus_t *bh, /* bus specifier structure */
unsigned char *buf, /* buffer to send */
int len /* number of bytes to send */
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| number of bytes sent or (negative) error code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code mpc83xx_spi_set_tfr_mode
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| set SPI to desired baudrate/clock mode/character mode |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_libi2c_bus_t *bh, /* bus specifier structure */
const rtems_libi2c_tfr_mode_t *tfr_mode /* transfer mode info */
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
int mpc83xx_spi_ioctl
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| perform selected ioctl function for SPI |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_libi2c_bus_t *bh, /* bus specifier structure */
int cmd, /* ioctl command code */
void *arg /* additional argument array */
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
#ifdef __cplusplus
}
#endif
#endif /* _MPC83XX_I2CDRV_H */
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