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/*
* RTEMS generic MPC5200 BSP
*
* This file contains the nvram declarations.
*
* M93C46 is a serial microwire EEPROM which contains
* 1Kbit (128 bytes/64 words) of non-volatile memory.
* The device can be configured for byte- or word-
* access. The driver provides a file-like interface
* to this memory.
*
* MPC5x00 PIN settings:
*
* PSC3_6 (output) -> MC93C46 serial data in (D)
* PSC3_7 (input) -> MC93C46 serial data out (Q)
* PSC3_8 (output) -> MC93C46 chip select input (S)
* PSC3_9 (output) -> MC93C46 serial clock (C)
*
* References: DS1307-based Non-Volatile memory device driver
* by Victor V. Vengerov.
*/
/*
* Author: Victor V. Vengerov
* Copyright (c) 2000 OKTET Ltd.,St.-Petersburg,Russia
*
* Copyright (c) 2003 IPR Engineering
*
* Copyright (c) 2005 embedded brains GmbH & Co. KG
*
* 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 __NVRAM_H__
#define __NVRAM_H__
#ifdef __cplusplus
extern "C" {
#endif
/* include <bsp.h> */
#include <bsp.h>
/* Macros for TBL read access */
#define TBL_READ(count) __asm__ volatile ("mftb %0\n" : "=r" (count) : "0" (count))
#define TMBASE_CLOCK (G2_CLOCK/4)
/* Simple usec delay function prototype */
void wait_usec(unsigned long);
/* nvram_driver_initialize --
* Non-volatile memory device driver initialization.
*/
rtems_device_driver
nvram_driver_initialize(rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg);
/* nvram_driver_open --
* Non-volatile memory device driver open primitive.
*/
rtems_device_driver
nvram_driver_open(rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg);
/* nvram_driver_close --
* Non-volatile memory device driver close primitive.
*/
rtems_device_driver
nvram_driver_close(rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg);
/* nvram_driver_read --
* Non-volatile memory device driver read primitive.
*/
rtems_device_driver
nvram_driver_read(rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg);
/* nvram_driver_write --
* Non-volatile memory device driver write primitive.
*/
rtems_device_driver
nvram_driver_write(rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg);
#ifdef __cplusplus
}
#endif
#endif /* __NVRAM_H__ */
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