tx4925_rtc.h

来自「for mips adm5120 uclibc-0.9.19 toolchain」· C头文件 代码 · 共 69 行

#ifndef TX4925_TX4925_RTC_H
#define TX4925_TX4925_RTC_H

/*
 * linux/include/asm-mips/tx4925/tx4925_rtc.h
 *
 * tx4925_rtc defs
 *
 * Author: MontaVista Software, Inc.  [e-mail]
 *
 * Copyright 2002 MontaVista Software Inc.
 *
 * 2003 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

#include <asm/tx4925/tx4925.h>
#include <asm/tx4925/tx4925_mips.h>

#define TX4925_RTC_BASE 0xff1ff900

#define TX4925_RTC_HI_MASK    0x00000ff
#define TX4925_RTC_FREQ_SHIFT 15	/* 32768Hz = 15bits */

#define TX4925_RTC_RTCCTRL_DISRTINT BM_07_07
#define TX4925_RTC_RTCCTRL_DISALINT BM_06_06
#define TX4925_RTC_RTCCTRL_RTCCLR   BM_03_03

struct tx4925_rtc_st {
	vu32 rtchi;
	vu32 rtclo;
	vu32 alarmhi;
	vu32 alarmlo;
	vu32 rtcctrl;
	vu32 rtcint;
};

extern struct tx4925_rtc_st *tx4925_rtc_ptr;

extern unsigned long tx4925_rtc_get_time(void);
int tx4925_rtc_set_time(unsigned long t);
void tx4925_rtc_init(unsigned long base);

/* wait for seconds to change */
extern inline void
tx4925_rtc_wait(void)
{
	u32 v1;
	u32 v2;
	u32 v3;
	u32 v4;

	do {
		v1 = tx4925_rtc_ptr->rtclo;
		v2 = tx4925_rtc_ptr->rtclo;
	} while (v1 != v2);

	v3 = v2 >> TX4925_RTC_FREQ_SHIFT;
	do {
		v4 = tx4925_rtc_ptr->rtclo >> TX4925_RTC_FREQ_SHIFT;
	} while (v3 == v4);

	return;
}

#endif