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/*===============================================================*\
| Project: RTEMS support for MPC8xx |
+-----------------------------------------------------------------+
| Copyright (c) 2009 |
| 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. |
| |
+-----------------------------------------------------------------+
| this file contains the MPC8xx SPI driver declarations |
\*===============================================================*/
#ifndef _M8XX_SPIDRV_H
#define _M8XX_SPIDRV_H
#include <mpc8xx.h>
#include <rtems/libi2c.h>
#include <rtems/irq.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct m8xx_spi_softc {
int initialized;
rtems_id irq_sema_id;
rtems_isr_entry old_handler;
m8xxBufferDescriptor_t *rx_bd;
m8xxBufferDescriptor_t *tx_bd;
} m8xx_spi_softc_t ;
typedef struct {
rtems_libi2c_bus_t bus_desc;
m8xx_spi_softc_t softc;
} m8xx_spi_desc_t;
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code m8xx_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 m8xx_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 m8xx_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 m8xx_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 m8xx_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 /* _M8XX_SPIDRV_H */
|
