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

/*
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 MK48T59 RTC
 */

#undef	RTC_DEBUG

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

#if defined(CONFIG_RTC_MK48T59)

#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_PCIPPC2)

#include "../board/pcippc2/pcippc2.h"

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

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

#elif defined(CONFIG_AMIGAONEG3SE)

#include "../board/MAI/AmigaOneG3SE/via686.h"
#include "../board/MAI/AmigaOneG3SE/memio.h"


static uchar rtc_read (short reg)
{
    out_byte(CMOS_ADDR, (uint8)reg);
    return in_byte(CMOS_DATA);
}

static void rtc_write (short reg, uchar val)
{
    out_byte(CMOS_ADDR, (uint8)reg);
    out_byte(CMOS_DATA, (uint8)val);
}

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

static unsigned bcd2bin (uchar n)
{
	return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F));
}

static unsigned char bin2bcd (unsigned int n)
{
	return (((n / 10) << 4) | (n % 10));
}

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

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 (CONFIG_COMMANDS & CFG_CMD_DATE)

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

void 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
}

void 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 */
}

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	/* (CONFIG_COMMANDS & CFG_CMD_DATE) */
#endif	/* CONFIG_RTC_MK48T59 */
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	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	/*
	25	* Date & Time support for the MK48T59 RTC
	26	*/
	27
	28	#undef RTC_DEBUG
	29
	30	#include <common.h>
	31	#include <command.h>
	32	#include <config.h>
	33	#include <rtc.h>
	34	#include <mk48t59.h>
	35
	36	#if defined(CONFIG_RTC_MK48T59)
	37
	38	#if defined(CONFIG_BAB7xx)
	39
	40	static uchar rtc_read (short reg)
	41	{
	42	out8(RTC_PORT_ADDR0, reg & 0xFF);
	43	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
	44	return in8(RTC_PORT_DATA);
	45	}
	46
	47	static void rtc_write (short reg, uchar val)
	48	{
	49	out8(RTC_PORT_ADDR0, reg & 0xFF);
	50	out8(RTC_PORT_ADDR1, (reg>>8) & 0xFF);
	51	out8(RTC_PORT_DATA, val);
	52	}
	53
	54	#elif defined(CONFIG_PCIPPC2)
	55
	56	#include "../board/pcippc2/pcippc2.h"
	57
	58	static uchar rtc_read (short reg)
	59	{
	60	return in8(RTC(reg));
	61	}
	62
	63	static void rtc_write (short reg, uchar val)
	64	{
65	out8(RTC(reg),val);
66	}
67
c7de829c WD	68	#elif defined(CONFIG_AMIGAONEG3SE)
	69
	70	#include "../board/MAI/AmigaOneG3SE/via686.h"
	71	#include "../board/MAI/AmigaOneG3SE/memio.h"
	72
	73
	74	static uchar rtc_read (short reg)
	75	{
	76	out_byte(CMOS_ADDR, (uint8)reg);
	77	return in_byte(CMOS_DATA);
	78	}
	79
	80	static void rtc_write (short reg, uchar val)
	81	{
	82	out_byte(CMOS_ADDR, (uint8)reg);
	83	out_byte(CMOS_DATA, (uint8)val);
	84	}
	85
1df49e27 WD	86	#else
	87	# error Board specific rtc access functions should be supplied
	88	#endif
	89
	90	static unsigned bcd2bin (uchar n)
	91	{
	92	return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F));
	93	}
	94
	95	static unsigned char bin2bcd (unsigned int n)
	96	{
	97	return (((n / 10) << 4) \| (n % 10));
	98	}
	99
	100	/* ------------------------------------------------------------------------- */
	101
	102	void nvram_read(void dest, const short src, size_t count)
	103	{
	104	uchar d = (uchar ) dest;
	105	short s = src;
	106
	107	while (count--)
	108	*d++ = rtc_read(s++);
	109
	110	return dest;
	111	}
	112
	113	void nvram_write(short dest, const void *src, size_t count)
	114	{
	115	short d = dest;
	116	uchar s = (uchar ) src;
	117
	118	while (count--)
	119	rtc_write(d++, *s++);
	120	}
	121
	122	#if (CONFIG_COMMANDS & CFG_CMD_DATE)
	123
	124	/* ------------------------------------------------------------------------- */
	125
	126	void rtc_get (struct rtc_time *tmp)
	127	{
	128	uchar save_ctrl_a;
	129	uchar sec, min, hour, mday, wday, mon, year;
	130
	131	/* Simple: freeze the clock, read it and allow updates again */
	132	save_ctrl_a = rtc_read(RTC_CONTROLA);
	133
	134	/* Set the register to read the value. */
	135	save_ctrl_a \|= RTC_CA_READ;
	136	rtc_write(RTC_CONTROLA, save_ctrl_a);
	137
	138	sec = rtc_read (RTC_SECONDS);
	139	min = rtc_read (RTC_MINUTES);
	140	hour = rtc_read (RTC_HOURS);
	141	mday = rtc_read (RTC_DAY_OF_MONTH);
	142	wday = rtc_read (RTC_DAY_OF_WEEK);
	143	mon = rtc_read (RTC_MONTH);
	144	year = rtc_read (RTC_YEAR);
	145
	146	/* re-enable update */
	147	save_ctrl_a &= ~RTC_CA_READ;
	148	rtc_write(RTC_CONTROLA, save_ctrl_a);
	149
150	#ifdef RTC_DEBUG
151	printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
152	"hr: %02x min: %02x sec: %02x\n",
153	year, mon, mday, wday,
154	hour, min, sec );
155	#endif
156	tmp->tm_sec = bcd2bin (sec & 0x7F);
157	tmp->tm_min = bcd2bin (min & 0x7F);
158	tmp->tm_hour = bcd2bin (hour & 0x3F);
159	tmp->tm_mday = bcd2bin (mday & 0x3F);
160	tmp->tm_mon = bcd2bin (mon & 0x1F);
161	tmp->tm_year = bcd2bin (year);
162	tmp->tm_wday = bcd2bin (wday & 0x07);
163	if(tmp->tm_year<70)
164	tmp->tm_year+=2000;
165	else
166	tmp->tm_year+=1900;
167	tmp->tm_yday = 0;
168	tmp->tm_isdst= 0;
169	#ifdef RTC_DEBUG
170	printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
171	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
172	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
173	#endif
174	}
175
176	void rtc_set (struct rtc_time *tmp)
177	{
178	uchar save_ctrl_a;
179
180	#ifdef RTC_DEBUG
181	printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
182	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
183	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
184	#endif
185	save_ctrl_a = rtc_read(RTC_CONTROLA);
186
187	save_ctrl_a \|= RTC_CA_WRITE;
188	rtc_write(RTC_CONTROLA, save_ctrl_a); /* disables the RTC to update the regs */
189
190	rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100));
191	rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon));
192
193	rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday));
194	rtc_write (RTC_DAY_OF_MONTH, bin2bcd(tmp->tm_mday));
195	rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour));
196	rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min ));
197	rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec ));
198
199	save_ctrl_a &= ~RTC_CA_WRITE;
200	rtc_write(RTC_CONTROLA, save_ctrl_a); /* enables the RTC to update the regs */
201	}
202
203	void rtc_reset (void)
204	{
205	uchar control_b;
206
207	/*
208	* Start oscillator here.
209	*/
210	control_b = rtc_read(RTC_CONTROLB);
211
212	control_b &= ~RTC_CB_STOP;
213	rtc_write(RTC_CONTROLB, control_b);
214	}
215
216	void rtc_set_watchdog(short multi, short res)
217	{
218	uchar wd_value;
219
220	wd_value = RTC_WDS \| ((multi & 0x1F) << 2) \| (res & 0x3);
221	rtc_write(RTC_WATCHDOG, wd_value);
222	}
223
224	#endif /* (CONFIG_COMMANDS & CFG_CMD_DATE) */
225	#endif /* CONFIG_RTC_MK48T59 */