[J-u-boot.git] / drivers / rtc / mpc5xxx.c

/*
 * (C) Copyright 2004
 * Reinhard Meyer, EMK Elektronik GmbH
 * [email protected]
 * www.emk-elektronik.de
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*****************************************************************************
 * Date & Time support for internal RTC of MPC52xx
 *****************************************************************************/
/*#define	DEBUG*/

#include <common.h>
#include <command.h>
#include <rtc.h>

#if defined(CONFIG_CMD_DATE)

/*****************************************************************************
 * this structure should be defined in mpc5200.h ...
 *****************************************************************************/
typedef struct rtc5200 {
	volatile ulong	tsr;	/* MBAR+0x800: time set register */
	volatile ulong	dsr;	/* MBAR+0x804: data set register */
	volatile ulong	nysr;	/* MBAR+0x808: new year and stopwatch register */
	volatile ulong	aier;	/* MBAR+0x80C: alarm and interrupt enable register */
	volatile ulong	ctr;	/* MBAR+0x810: current time register */
	volatile ulong	cdr;	/* MBAR+0x814: current data register */
	volatile ulong	asir;	/* MBAR+0x818: alarm and stopwatch interrupt register */
	volatile ulong	piber;	/* MBAR+0x81C: periodic interrupt and bus error register */
	volatile ulong	trdr;	/* MBAR+0x820: test register/divides register */
} RTC5200;

#define	RTC_SET		0x02000000
#define	RTC_PAUSE	0x01000000

/*****************************************************************************
 * get time
 *****************************************************************************/
int rtc_get (struct rtc_time *tmp)
{
	RTC5200	*rtc = (RTC5200 *) (CONFIG_SYS_MBAR+0x800);
	ulong time, date, time2;

	/* read twice to avoid getting a funny time when the second is just changing */
	do {
		time = rtc->ctr;
		date = rtc->cdr;
		time2 = rtc->ctr;
	} while (time != time2);

	tmp->tm_year	= date & 0xfff;
	tmp->tm_mon		= (date >> 24) & 0xf;
	tmp->tm_mday	= (date >> 16) & 0x1f;
	tmp->tm_wday	= (date >> 21) & 7;
	/* sunday is 7 in 5200 but 0 in rtc_time */
	if (tmp->tm_wday == 7)
		tmp->tm_wday = 0;
	tmp->tm_hour	= (time >> 16) & 0x1f;
	tmp->tm_min		= (time >> 8) & 0x3f;
	tmp->tm_sec		= time & 0x3f;

	debug ( "Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
		tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

	return 0;
}

/*****************************************************************************
 * set time
 *****************************************************************************/
int rtc_set (struct rtc_time *tmp)
{
	RTC5200	*rtc = (RTC5200 *) (CONFIG_SYS_MBAR+0x800);
	ulong time, date, year;

	debug ( "Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
		tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
		tmp->tm_hour, tmp->tm_min, tmp->tm_sec);

	time = (tmp->tm_hour << 16) | (tmp->tm_min << 8) | tmp->tm_sec;
	date = (tmp->tm_mon << 16) | tmp->tm_mday;
	if (tmp->tm_wday == 0)
		date |= (7 << 8);
	else
		date |= (tmp->tm_wday << 8);
	year = tmp->tm_year;

	/* mask unwanted bits that might show up when rtc_time is corrupt */
	time &= 0x001f3f3f;
	date &= 0x001f071f;
	year &= 0x00000fff;

	/* pause and set the RTC */
	rtc->nysr = year;
	rtc->dsr = date | RTC_PAUSE;
	udelay (1000);
	rtc->dsr = date | RTC_PAUSE | RTC_SET;
	udelay (1000);
	rtc->dsr = date | RTC_PAUSE;
	udelay (1000);
	rtc->dsr = date;
	udelay (1000);

	rtc->tsr = time | RTC_PAUSE;
	udelay (1000);
	rtc->tsr = time | RTC_PAUSE | RTC_SET;
	udelay (1000);
	rtc->tsr = time | RTC_PAUSE;
	udelay (1000);
	rtc->tsr = time;
	udelay (1000);

	return 0;
}

/*****************************************************************************
 * reset rtc circuit
 *****************************************************************************/
void rtc_reset (void)
{
	return;	/* nothing to do */
}

#endif
Commit	Line	Data
1c43771b WD	1	/*
	2	* (C) Copyright 2004
	3	* Reinhard Meyer, EMK Elektronik GmbH
	4	* [email protected]
	5	* www.emk-elektronik.de
	6	*
1a459660	7	* SPDX-License-Identifier: GPL-2.0+
1c43771b WD	8	*/
	9
	10	/*****************************************************************************
	11	* Date & Time support for internal RTC of MPC52xx
	12	*****************************************************************************/
	13	/#define DEBUG/
	14
	15	#include <common.h>
	16	#include <command.h>
	17	#include <rtc.h>
	18
871c18dd	19	#if defined(CONFIG_CMD_DATE)
1c43771b WD	20
	21	/*****************************************************************************
	22	* this structure should be defined in mpc5200.h ...
	23	*****************************************************************************/
	24	typedef struct rtc5200 {
	25	volatile ulong tsr; /* MBAR+0x800: time set register */
	26	volatile ulong dsr; /* MBAR+0x804: data set register */
	27	volatile ulong nysr; /* MBAR+0x808: new year and stopwatch register */
	28	volatile ulong aier; /* MBAR+0x80C: alarm and interrupt enable register */
	29	volatile ulong ctr; /* MBAR+0x810: current time register */
	30	volatile ulong cdr; /* MBAR+0x814: current data register */
16263087	31	volatile ulong asir; /* MBAR+0x818: alarm and stopwatch interrupt register */
1c43771b WD	32	volatile ulong piber; /* MBAR+0x81C: periodic interrupt and bus error register */
	33	volatile ulong trdr; /* MBAR+0x820: test register/divides register */
	34	} RTC5200;
	35
	36	#define RTC_SET 0x02000000
	37	#define RTC_PAUSE 0x01000000
	38
	39	/*****************************************************************************
	40	* get time
	41	*****************************************************************************/
b73a19e1	42	int rtc_get (struct rtc_time *tmp)
1c43771b	43	{
6d0f6bcf	44	RTC5200 rtc = (RTC5200 ) (CONFIG_SYS_MBAR+0x800);
1c43771b WD	45	ulong time, date, time2;
	46
	47	/* read twice to avoid getting a funny time when the second is just changing */
	48	do {
	49	time = rtc->ctr;
	50	date = rtc->cdr;
	51	time2 = rtc->ctr;
	52	} while (time != time2);
	53
	54	tmp->tm_year = date & 0xfff;
	55	tmp->tm_mon = (date >> 24) & 0xf;
	56	tmp->tm_mday = (date >> 16) & 0x1f;
	57	tmp->tm_wday = (date >> 21) & 7;
	58	/* sunday is 7 in 5200 but 0 in rtc_time */
	59	if (tmp->tm_wday == 7)
	60	tmp->tm_wday = 0;
	61	tmp->tm_hour = (time >> 16) & 0x1f;
	62	tmp->tm_min = (time >> 8) & 0x3f;
	63	tmp->tm_sec = time & 0x3f;
	64
	65	debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	66	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	67	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
b73a19e1 YT	68
b73a19e1 YT	69	return 0;
1c43771b WD	70	}
	71
	72	/*****************************************************************************
	73	* set time
	74	*****************************************************************************/
d1e23194	75	int rtc_set (struct rtc_time *tmp)
1c43771b	76	{
6d0f6bcf	77	RTC5200 rtc = (RTC5200 ) (CONFIG_SYS_MBAR+0x800);
1c43771b WD	78	ulong time, date, year;
	79
	80	debug ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	81	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	82	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	83
	84	time = (tmp->tm_hour << 16) \| (tmp->tm_min << 8) \| tmp->tm_sec;
	85	date = (tmp->tm_mon << 16) \| tmp->tm_mday;
	86	if (tmp->tm_wday == 0)
	87	date \|= (7 << 8);
	88	else
	89	date \|= (tmp->tm_wday << 8);
	90	year = tmp->tm_year;
	91
	92	/* mask unwanted bits that might show up when rtc_time is corrupt */
	93	time &= 0x001f3f3f;
	94	date &= 0x001f071f;
	95	year &= 0x00000fff;
	96
	97	/* pause and set the RTC */
	98	rtc->nysr = year;
	99	rtc->dsr = date \| RTC_PAUSE;
	100	udelay (1000);
	101	rtc->dsr = date \| RTC_PAUSE \| RTC_SET;
	102	udelay (1000);
	103	rtc->dsr = date \| RTC_PAUSE;
	104	udelay (1000);
	105	rtc->dsr = date;
	106	udelay (1000);
	107
	108	rtc->tsr = time \| RTC_PAUSE;
	109	udelay (1000);
	110	rtc->tsr = time \| RTC_PAUSE \| RTC_SET;
	111	udelay (1000);
	112	rtc->tsr = time \| RTC_PAUSE;
	113	udelay (1000);
	114	rtc->tsr = time;
	115	udelay (1000);
d1e23194 JCPV	116
d1e23194 JCPV	117	return 0;
1c43771b WD	118	}
	119
	120	/*****************************************************************************
	121	* reset rtc circuit
	122	*****************************************************************************/
	123	void rtc_reset (void)
	124	{
	125	return; /* nothing to do */
	126	}
	127
068b60a0	128	#endif