[people/ms/u-boot.git] / drivers / rtc / ds12887.c

/*
 * (C) Copyright 2003
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Date & Time support for the DS12887 RTC
 */

#undef	RTC_DEBUG

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

#if defined(CONFIG_CMD_DATE)

#define RTC_SECONDS			0x00
#define RTC_SECONDS_ALARM		0x01
#define RTC_MINUTES			0x02
#define RTC_MINUTES_ALARM		0x03
#define RTC_HOURS			0x04
#define RTC_HOURS_ALARM			0x05
#define RTC_DAY_OF_WEEK			0x06
#define RTC_DATE_OF_MONTH		0x07
#define RTC_MONTH			0x08
#define RTC_YEAR			0x09
#define RTC_CONTROL_A			0x0A
#define RTC_CONTROL_B			0x0B
#define RTC_CONTROL_C			0x0C
#define RTC_CONTROL_D			0x0D

#define RTC_CA_UIP			0x80
#define RTC_CB_DM			0x04
#define RTC_CB_24_12			0x02
#define RTC_CB_SET			0x80

#if defined(CONFIG_ATC)

static uchar rtc_read (uchar reg)
{
	uchar val;

	*(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
	__asm__ __volatile__ ("sync");

	val = *(volatile unsigned char*)(RTC_PORT_DATA);
	return (val);
}

static void rtc_write (uchar reg, uchar val)
{
	*(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
	__asm__ __volatile__ ("sync");

	*(volatile unsigned char*)(RTC_PORT_DATA) = val;
	__asm__ __volatile__ ("sync");
}

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

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

	/* check if rtc is available for access */
	while( rtc_read(RTC_CONTROL_A) & RTC_CA_UIP)
		;

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

#ifdef RTC_DEBUG
	printf( "Get RTC year: %d; mon: %d; mday: %d; wday: %d; "
		"hr: %d; min: %d; sec: %d\n",
		year, mon, mday, wday, hour, min, sec );

	printf ( "Alarms: hour: %02x min: %02x sec: %02x\n",
		 rtc_read (RTC_HOURS_ALARM),
		 rtc_read (RTC_MINUTES_ALARM),
		 rtc_read (RTC_SECONDS_ALARM) );
#endif

	if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
	{	    /* Information is in BCD format */
printf(" Get: Convert BSD to BIN\n");
		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);
	}
else
	{
		tmp->tm_sec  = sec  & 0x7F;
		tmp->tm_min  = min  & 0x7F;
		tmp->tm_hour = hour & 0x3F;
		tmp->tm_mday = mday & 0x3F;
		tmp->tm_mon  = mon & 0x1F;
		tmp->tm_year = year;
		tmp->tm_wday = 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_b;
	uchar sec, min, hour, mday, wday, mon, year;

#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

	if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
	{	    /* Information is in BCD format */
		year = bin2bcd(tmp->tm_year % 100);
		mon  = bin2bcd(tmp->tm_mon);
		wday = bin2bcd(tmp->tm_wday);
		mday = bin2bcd(tmp->tm_mday);
		hour = bin2bcd(tmp->tm_hour);
		min  = bin2bcd(tmp->tm_min);
		sec  = bin2bcd(tmp->tm_sec);
	}
	else
	{
		year = tmp->tm_year % 100;
		mon  = tmp->tm_mon;
		wday = tmp->tm_wday;
		mday = tmp->tm_mday;
		hour = tmp->tm_hour;
		min  = tmp->tm_min;
		sec  = tmp->tm_sec;
	}

	/* disables the RTC to update the regs */
	save_ctrl_b = rtc_read(RTC_CONTROL_B);
	save_ctrl_b |= RTC_CB_SET;
	rtc_write(RTC_CONTROL_B, save_ctrl_b);

	rtc_write (RTC_YEAR, year);
	rtc_write (RTC_MONTH, mon);
	rtc_write (RTC_DAY_OF_WEEK, wday);
	rtc_write (RTC_DATE_OF_MONTH, mday);
	rtc_write (RTC_HOURS, hour);
	rtc_write (RTC_MINUTES, min);
	rtc_write (RTC_SECONDS, sec);

	/* enables the RTC to update the regs */
	save_ctrl_b &= ~RTC_CB_SET;
	rtc_write(RTC_CONTROL_B, save_ctrl_b);

	return 0;
}

void rtc_reset (void)
{
	struct rtc_time tmp;
	uchar ctrl_rg;

	ctrl_rg = RTC_CB_SET;
	rtc_write(RTC_CONTROL_B,ctrl_rg);

	tmp.tm_year = 1970 % 100;
	tmp.tm_mon = 1;
	tmp.tm_mday= 1;
	tmp.tm_hour = 0;
	tmp.tm_min = 0;
	tmp.tm_sec = 0;

#ifdef RTC_DEBUG
	printf ( "RTC:   %4d-%02d-%02d %2d:%02d:%02d UTC\n",
		    tmp.tm_year, tmp.tm_mon, tmp.tm_mday,
		    tmp.tm_hour, tmp.tm_min, tmp.tm_sec);
#endif

	ctrl_rg = RTC_CB_SET | RTC_CB_24_12 | RTC_CB_DM;
	rtc_write(RTC_CONTROL_B,ctrl_rg);
	rtc_set(&tmp);

	rtc_write(RTC_HOURS_ALARM, 0),
	rtc_write(RTC_MINUTES_ALARM, 0),
	rtc_write(RTC_SECONDS_ALARM, 0);

	ctrl_rg = RTC_CB_24_12 | RTC_CB_DM;
	rtc_write(RTC_CONTROL_B,ctrl_rg);
}

#endif
Commit	Line	Data
15ef8a5d WD	1	/*
	2	* (C) Copyright 2003
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation; either version 2 of
	7	* the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	17	* MA 02111-1307 USA
	18	*/
	19
	20	/*
	21	* Date & Time support for the DS12887 RTC
	22	*/
	23
	24	#undef RTC_DEBUG
	25
	26	#include <common.h>
	27	#include <command.h>
	28	#include <config.h>
	29	#include <rtc.h>
	30
871c18dd	31	#if defined(CONFIG_CMD_DATE)
15ef8a5d WD	32
	33	#define RTC_SECONDS 0x00
	34	#define RTC_SECONDS_ALARM 0x01
	35	#define RTC_MINUTES 0x02
	36	#define RTC_MINUTES_ALARM 0x03
	37	#define RTC_HOURS 0x04
53677ef1 WD	38	#define RTC_HOURS_ALARM 0x05
53677ef1 WD	39	#define RTC_DAY_OF_WEEK 0x06
15ef8a5d WD	40	#define RTC_DATE_OF_MONTH 0x07
	41	#define RTC_MONTH 0x08
	42	#define RTC_YEAR 0x09
53677ef1 WD	43	#define RTC_CONTROL_A 0x0A
	44	#define RTC_CONTROL_B 0x0B
	45	#define RTC_CONTROL_C 0x0C
15ef8a5d WD	46	#define RTC_CONTROL_D 0x0D
15ef8a5d WD	47
993cad93	48	#define RTC_CA_UIP 0x80
15ef8a5d WD	49	#define RTC_CB_DM 0x04
	50	#define RTC_CB_24_12 0x02
	51	#define RTC_CB_SET 0x80
	52
	53	#if defined(CONFIG_ATC)
	54
	55	static uchar rtc_read (uchar reg)
	56	{
	57	uchar val;
993cad93	58
8bde7f77	59	(volatile unsigned char)(RTC_PORT_ADDR) = reg;
15ef8a5d	60	__asm__ __volatile__ ("sync");
993cad93	61
15ef8a5d WD	62	val = (volatile unsigned char)(RTC_PORT_DATA);
	63	return (val);
	64	}
	65
	66	static void rtc_write (uchar reg, uchar val)
	67	{
8bde7f77	68	(volatile unsigned char)(RTC_PORT_ADDR) = reg;
15ef8a5d WD	69	__asm__ __volatile__ ("sync");
	70
	71	(volatile unsigned char)(RTC_PORT_DATA) = val;
	72	__asm__ __volatile__ ("sync");
	73	}
	74
	75	#else
	76	# error Board specific rtc access functions should be supplied
	77	#endif
	78
b73a19e1	79	int rtc_get (struct rtc_time *tmp)
15ef8a5d WD	80	{
	81	uchar sec, min, hour, mday, wday, mon, year;
	82
	83	/* check if rtc is available for access */
	84	while( rtc_read(RTC_CONTROL_A) & RTC_CA_UIP)
	85	;
993cad93	86
15ef8a5d WD	87	sec = rtc_read(RTC_SECONDS);
	88	min = rtc_read(RTC_MINUTES);
	89	hour = rtc_read(RTC_HOURS);
	90	mday = rtc_read(RTC_DATE_OF_MONTH);
	91	wday = rtc_read(RTC_DAY_OF_WEEK);
	92	mon = rtc_read(RTC_MONTH);
	93	year = rtc_read(RTC_YEAR);
	94
	95	#ifdef RTC_DEBUG
	96	printf( "Get RTC year: %d; mon: %d; mday: %d; wday: %d; "
	97	"hr: %d; min: %d; sec: %d\n",
	98	year, mon, mday, wday, hour, min, sec );
	99
	100	printf ( "Alarms: hour: %02x min: %02x sec: %02x\n",
	101	rtc_read (RTC_HOURS_ALARM),
	102	rtc_read (RTC_MINUTES_ALARM),
	103	rtc_read (RTC_SECONDS_ALARM) );
	104	#endif
	105
	106	if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
	107	{ /* Information is in BCD format */
	108	printf(" Get: Convert BSD to BIN\n");
	109	tmp->tm_sec = bcd2bin (sec & 0x7F);
	110	tmp->tm_min = bcd2bin (min & 0x7F);
	111	tmp->tm_hour = bcd2bin (hour & 0x3F);
	112	tmp->tm_mday = bcd2bin (mday & 0x3F);
	113	tmp->tm_mon = bcd2bin (mon & 0x1F);
	114	tmp->tm_year = bcd2bin (year);
	115	tmp->tm_wday = bcd2bin (wday & 0x07);
	116	}
	117	else
	118	{
	119	tmp->tm_sec = sec & 0x7F;
	120	tmp->tm_min = min & 0x7F;
	121	tmp->tm_hour = hour & 0x3F;
	122	tmp->tm_mday = mday & 0x3F;
	123	tmp->tm_mon = mon & 0x1F;
	124	tmp->tm_year = year;
	125	tmp->tm_wday = wday & 0x07;
	126	}
	127
	128
	129	if(tmp->tm_year<70)
	130	tmp->tm_year+=2000;
	131	else
	132	tmp->tm_year+=1900;
	133
	134	tmp->tm_yday = 0;
	135	tmp->tm_isdst= 0;
	136	#ifdef RTC_DEBUG
	137	printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	138	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	139	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	140	#endif
b73a19e1 YT	141
b73a19e1 YT	142	return 0;
15ef8a5d WD	143	}
15ef8a5d WD	144
d1e23194	145	int rtc_set (struct rtc_time *tmp)
15ef8a5d WD	146	{
	147	uchar save_ctrl_b;
	148	uchar sec, min, hour, mday, wday, mon, year;
	149
	150	#ifdef RTC_DEBUG
	151	printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	152	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	153	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	154	#endif
	155
	156	if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
	157	{ /* Information is in BCD format */
	158	year = bin2bcd(tmp->tm_year % 100);
	159	mon = bin2bcd(tmp->tm_mon);
	160	wday = bin2bcd(tmp->tm_wday);
	161	mday = bin2bcd(tmp->tm_mday);
	162	hour = bin2bcd(tmp->tm_hour);
	163	min = bin2bcd(tmp->tm_min);
	164	sec = bin2bcd(tmp->tm_sec);
	165	}
	166	else
	167	{
	168	year = tmp->tm_year % 100;
	169	mon = tmp->tm_mon;
	170	wday = tmp->tm_wday;
	171	mday = tmp->tm_mday;
	172	hour = tmp->tm_hour;
	173	min = tmp->tm_min;
	174	sec = tmp->tm_sec;
	175	}
993cad93	176
15ef8a5d WD	177	/* disables the RTC to update the regs */
	178	save_ctrl_b = rtc_read(RTC_CONTROL_B);
	179	save_ctrl_b \|= RTC_CB_SET;
993cad93	180	rtc_write(RTC_CONTROL_B, save_ctrl_b);
15ef8a5d WD	181
	182	rtc_write (RTC_YEAR, year);
	183	rtc_write (RTC_MONTH, mon);
	184	rtc_write (RTC_DAY_OF_WEEK, wday);
	185	rtc_write (RTC_DATE_OF_MONTH, mday);
	186	rtc_write (RTC_HOURS, hour);
	187	rtc_write (RTC_MINUTES, min);
	188	rtc_write (RTC_SECONDS, sec);
	189
	190	/* enables the RTC to update the regs */
	191	save_ctrl_b &= ~RTC_CB_SET;
993cad93	192	rtc_write(RTC_CONTROL_B, save_ctrl_b);
d1e23194 JCPV	193
d1e23194 JCPV	194	return 0;
15ef8a5d WD	195	}
	196
	197	void rtc_reset (void)
	198	{
	199	struct rtc_time tmp;
	200	uchar ctrl_rg;
993cad93	201
15ef8a5d	202	ctrl_rg = RTC_CB_SET;
993cad93 WD	203	rtc_write(RTC_CONTROL_B,ctrl_rg);
993cad93 WD	204
15ef8a5d WD	205	tmp.tm_year = 1970 % 100;
	206	tmp.tm_mon = 1;
	207	tmp.tm_mday= 1;
	208	tmp.tm_hour = 0;
	209	tmp.tm_min = 0;
	210	tmp.tm_sec = 0;
993cad93	211
15ef8a5d	212	#ifdef RTC_DEBUG
8bde7f77 WD	213	printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n",
8bde7f77 WD	214	tmp.tm_year, tmp.tm_mon, tmp.tm_mday,
15ef8a5d WD	215	tmp.tm_hour, tmp.tm_min, tmp.tm_sec);
	216	#endif
	217
	218	ctrl_rg = RTC_CB_SET \| RTC_CB_24_12 \| RTC_CB_DM;
993cad93	219	rtc_write(RTC_CONTROL_B,ctrl_rg);
8bde7f77	220	rtc_set(&tmp);
15ef8a5d WD	221
15ef8a5d WD	222	rtc_write(RTC_HOURS_ALARM, 0),
993cad93	223	rtc_write(RTC_MINUTES_ALARM, 0),
15ef8a5d	224	rtc_write(RTC_SECONDS_ALARM, 0);
993cad93	225
15ef8a5d	226	ctrl_rg = RTC_CB_24_12 \| RTC_CB_DM;
993cad93	227	rtc_write(RTC_CONTROL_B,ctrl_rg);
15ef8a5d WD	228	}
15ef8a5d WD	229
a593814f	230	#endif