[people/ms/u-boot.git] / drivers / rtc / mk48t59.c

/*
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.de>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Date & Time support for the MK48T59 RTC
 */

#undef	RTC_DEBUG

#include <common.h>
#include <command.h>
#include <config.h>
#include <rtc.h>
#include <mk48t59.h>

#if defined(CONFIG_BAB7xx)

static uchar rtc_read (short reg)
{
	out8(RTC_PORT_ADDR0, reg & 0xFF);
	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
	return in8(RTC_PORT_DATA);
}

static void rtc_write (short reg, uchar val)
{
	out8(RTC_PORT_ADDR0, reg & 0xFF);
	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
	out8(RTC_PORT_DATA, val);
}

#elif defined(CONFIG_EVAL5200)

static uchar rtc_read (short reg)
{
	return in8(RTC(reg));
}

static void rtc_write (short reg, uchar val)
{
	out8(RTC(reg),val);
}

#else
# error Board specific rtc access functions should be supplied
#endif

/* ------------------------------------------------------------------------- */

void *nvram_read(void *dest, const short src, size_t count)
{
	uchar *d = (uchar *) dest;
	short s = src;

	while (count--)
		*d++ = rtc_read(s++);

	return dest;
}

void nvram_write(short dest, const void *src, size_t count)
{
	short d = dest;
	uchar *s = (uchar *) src;

	while (count--)
		rtc_write(d++, *s++);
}

#if defined(CONFIG_CMD_DATE)

/* ------------------------------------------------------------------------- */

int rtc_get (struct rtc_time *tmp)
{
	uchar save_ctrl_a;
	uchar sec, min, hour, mday, wday, mon, year;

	/* Simple: freeze the clock, read it and allow updates again */
	save_ctrl_a = rtc_read(RTC_CONTROLA);

	/* Set the register to read the value. */
	save_ctrl_a |= RTC_CA_READ;
	rtc_write(RTC_CONTROLA, save_ctrl_a);

	sec		= rtc_read (RTC_SECONDS);
	min		= rtc_read (RTC_MINUTES);
	hour	= rtc_read (RTC_HOURS);
	mday	= rtc_read (RTC_DAY_OF_MONTH);
	wday	= rtc_read (RTC_DAY_OF_WEEK);
	mon		= rtc_read (RTC_MONTH);
	year	= rtc_read (RTC_YEAR);

	/* re-enable update */
	save_ctrl_a &= ~RTC_CA_READ;
	rtc_write(RTC_CONTROLA, save_ctrl_a);

#ifdef RTC_DEBUG
	printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
		"hr: %02x min: %02x sec: %02x\n",
		year, mon, mday, wday,
		hour, min, sec );
#endif
	tmp->tm_sec  = bcd2bin (sec  & 0x7F);
	tmp->tm_min  = bcd2bin (min  & 0x7F);
	tmp->tm_hour = bcd2bin (hour & 0x3F);
	tmp->tm_mday = bcd2bin (mday & 0x3F);
	tmp->tm_mon  = bcd2bin (mon & 0x1F);
	tmp->tm_year = bcd2bin (year);
	tmp->tm_wday = bcd2bin (wday & 0x07);
	if(tmp->tm_year<70)
		tmp->tm_year+=2000;
	else
		tmp->tm_year+=1900;
	tmp->tm_yday = 0;
	tmp->tm_isdst= 0;
#ifdef RTC_DEBUG
	printf ( "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);
#endif

	return 0;
}

int rtc_set (struct rtc_time *tmp)
{
	uchar save_ctrl_a;

#ifdef RTC_DEBUG
	printf ( "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);
#endif
	save_ctrl_a = rtc_read(RTC_CONTROLA);

	save_ctrl_a |= RTC_CA_WRITE;
	rtc_write(RTC_CONTROLA, save_ctrl_a); /* disables the RTC to update the regs */

	rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
	rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));

	rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
	rtc_write (RTC_DAY_OF_MONTH, bin2bcd(tmp->tm_mday));
	rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
	rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
	rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));

	save_ctrl_a &= ~RTC_CA_WRITE;
	rtc_write(RTC_CONTROLA, save_ctrl_a); /* enables the RTC to update the regs */

	return 0;
}

void rtc_reset (void)
{
	uchar control_b;

	/*
	 * Start oscillator here.
	 */
	control_b = rtc_read(RTC_CONTROLB);

	control_b &= ~RTC_CB_STOP;
	rtc_write(RTC_CONTROLB, control_b);
}

void rtc_set_watchdog(short multi, short res)
{
	uchar wd_value;

	wd_value = RTC_WDS | ((multi & 0x1F) << 2) | (res & 0x3);
	rtc_write(RTC_WATCHDOG, wd_value);
}

#endif
Commit	Line	Data
1df49e27 WD	1	/*
	2	* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	3	* Andreas Heppel <aheppel@sysgo.de>
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
1df49e27 WD	6	*/
	7
	8	/*
	9	* Date & Time support for the MK48T59 RTC
	10	*/
	11
	12	#undef RTC_DEBUG
	13
	14	#include <common.h>
	15	#include <command.h>
	16	#include <config.h>
	17	#include <rtc.h>
	18	#include <mk48t59.h>
	19
1df49e27 WD	20	#if defined(CONFIG_BAB7xx)
	21
	22	static uchar rtc_read (short reg)
	23	{
	24	out8(RTC_PORT_ADDR0, reg & 0xFF);
	25	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
	26	return in8(RTC_PORT_DATA);
	27	}
	28
	29	static void rtc_write (short reg, uchar val)
	30	{
	31	out8(RTC_PORT_ADDR0, reg & 0xFF);
	32	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
	33	out8(RTC_PORT_DATA, val);
	34	}
	35
63e73c9a WD	36	#elif defined(CONFIG_EVAL5200)
	37
	38	static uchar rtc_read (short reg)
	39	{
	40	return in8(RTC(reg));
	41	}
	42
	43	static void rtc_write (short reg, uchar val)
	44	{
	45	out8(RTC(reg),val);
	46	}
	47
1df49e27 WD	48	#else
	49	# error Board specific rtc access functions should be supplied
	50	#endif
	51
1df49e27 WD	52	/* ------------------------------------------------------------------------- */
	53
	54	void nvram_read(void dest, const short src, size_t count)
	55	{
	56	uchar d = (uchar ) dest;
	57	short s = src;
	58
	59	while (count--)
	60	*d++ = rtc_read(s++);
	61
	62	return dest;
	63	}
	64
	65	void nvram_write(short dest, const void *src, size_t count)
	66	{
	67	short d = dest;
	68	uchar s = (uchar ) src;
	69
	70	while (count--)
	71	rtc_write(d++, *s++);
	72	}
	73
a593814f	74	#if defined(CONFIG_CMD_DATE)
1df49e27 WD	75
	76	/* ------------------------------------------------------------------------- */
	77
b73a19e1	78	int rtc_get (struct rtc_time *tmp)
1df49e27 WD	79	{
	80	uchar save_ctrl_a;
	81	uchar sec, min, hour, mday, wday, mon, year;
	82
	83	/* Simple: freeze the clock, read it and allow updates again */
	84	save_ctrl_a = rtc_read(RTC_CONTROLA);
	85
	86	/* Set the register to read the value. */
	87	save_ctrl_a \|= RTC_CA_READ;
	88	rtc_write(RTC_CONTROLA, save_ctrl_a);
	89
	90	sec = rtc_read (RTC_SECONDS);
	91	min = rtc_read (RTC_MINUTES);
	92	hour = rtc_read (RTC_HOURS);
	93	mday = rtc_read (RTC_DAY_OF_MONTH);
	94	wday = rtc_read (RTC_DAY_OF_WEEK);
	95	mon = rtc_read (RTC_MONTH);
	96	year = rtc_read (RTC_YEAR);
	97
	98	/* re-enable update */
	99	save_ctrl_a &= ~RTC_CA_READ;
	100	rtc_write(RTC_CONTROLA, save_ctrl_a);
	101
	102	#ifdef RTC_DEBUG
	103	printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
	104	"hr: %02x min: %02x sec: %02x\n",
	105	year, mon, mday, wday,
	106	hour, min, sec );
	107	#endif
	108	tmp->tm_sec = bcd2bin (sec & 0x7F);
	109	tmp->tm_min = bcd2bin (min & 0x7F);
	110	tmp->tm_hour = bcd2bin (hour & 0x3F);
	111	tmp->tm_mday = bcd2bin (mday & 0x3F);
	112	tmp->tm_mon = bcd2bin (mon & 0x1F);
	113	tmp->tm_year = bcd2bin (year);
	114	tmp->tm_wday = bcd2bin (wday & 0x07);
	115	if(tmp->tm_year<70)
	116	tmp->tm_year+=2000;
	117	else
	118	tmp->tm_year+=1900;
	119	tmp->tm_yday = 0;
	120	tmp->tm_isdst= 0;
	121	#ifdef RTC_DEBUG
	122	printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	123	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	124	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	125	#endif
b73a19e1 YT	126
b73a19e1 YT	127	return 0;
1df49e27 WD	128	}
1df49e27 WD	129
d1e23194	130	int rtc_set (struct rtc_time *tmp)
1df49e27 WD	131	{
	132	uchar save_ctrl_a;
	133
	134	#ifdef RTC_DEBUG
	135	printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	136	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	137	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	138	#endif
	139	save_ctrl_a = rtc_read(RTC_CONTROLA);
	140
	141	save_ctrl_a \|= RTC_CA_WRITE;
	142	rtc_write(RTC_CONTROLA, save_ctrl_a); /* disables the RTC to update the regs */
	143
	144	rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
	145	rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
	146
	147	rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
	148	rtc_write (RTC_DAY_OF_MONTH, bin2bcd(tmp->tm_mday));
	149	rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
	150	rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
	151	rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));
	152
	153	save_ctrl_a &= ~RTC_CA_WRITE;
	154	rtc_write(RTC_CONTROLA, save_ctrl_a); /* enables the RTC to update the regs */
d1e23194 JCPV	155
d1e23194 JCPV	156	return 0;
1df49e27 WD	157	}
	158
	159	void rtc_reset (void)
	160	{
	161	uchar control_b;
	162
	163	/*
	164	* Start oscillator here.
	165	*/
	166	control_b = rtc_read(RTC_CONTROLB);
	167
	168	control_b &= ~RTC_CB_STOP;
	169	rtc_write(RTC_CONTROLB, control_b);
	170	}
	171
2c5e3cc4	172	void rtc_set_watchdog(short multi, short res)
1df49e27 WD	173	{
	174	uchar wd_value;
	175
	176	wd_value = RTC_WDS \| ((multi & 0x1F) << 2) \| (res & 0x3);
	177	rtc_write(RTC_WATCHDOG, wd_value);
	178	}
	179
a593814f	180	#endif