[thirdparty/u-boot.git] / drivers / rtc / pcf8563.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 */

/*
 * Date & Time support for Philips PCF8563 RTC
 */

/* #define	DEBUG	*/

#include <common.h>
#include <command.h>
#include <dm.h>
#include <log.h>
#include <rtc.h>
#include <i2c.h>

#if !CONFIG_IS_ENABLED(DM_RTC)
static uchar rtc_read  (uchar reg);
static void  rtc_write (uchar reg, uchar val);

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

int rtc_get (struct rtc_time *tmp)
{
	int rel = 0;
	uchar sec, min, hour, mday, wday, mon_cent, year;

	sec	= rtc_read (0x02);
	min	= rtc_read (0x03);
	hour	= rtc_read (0x04);
	mday	= rtc_read (0x05);
	wday	= rtc_read (0x06);
	mon_cent= rtc_read (0x07);
	year	= rtc_read (0x08);

	debug ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
		"hr: %02x min: %02x sec: %02x\n",
		year, mon_cent, mday, wday,
		hour, min, sec );
	debug ( "Alarms: wday: %02x day: %02x hour: %02x min: %02x\n",
		rtc_read (0x0C),
		rtc_read (0x0B),
		rtc_read (0x0A),
		rtc_read (0x09) );

	if (sec & 0x80) {
		puts ("### Warning: RTC Low Voltage - date/time not reliable\n");
		rel = -1;
	}

	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_cent & 0x1F);
	tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 1900 : 2000);
	tmp->tm_wday = bcd2bin (wday & 0x07);
	tmp->tm_yday = 0;
	tmp->tm_isdst= 0;

	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 rel;
}

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

	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);

	rtc_write (0x08, bin2bcd(tmp->tm_year % 100));

	century = (tmp->tm_year >= 2000) ? 0 : 0x80;
	rtc_write (0x07, bin2bcd(tmp->tm_mon) | century);

	rtc_write (0x06, bin2bcd(tmp->tm_wday));
	rtc_write (0x05, bin2bcd(tmp->tm_mday));
	rtc_write (0x04, bin2bcd(tmp->tm_hour));
	rtc_write (0x03, bin2bcd(tmp->tm_min ));
	rtc_write (0x02, bin2bcd(tmp->tm_sec ));

	return 0;
}

void rtc_reset (void)
{
	/* clear all control & status registers */
	rtc_write (0x00, 0x00);
	rtc_write (0x01, 0x00);
	rtc_write (0x0D, 0x00);

	/* clear Voltage Low bit */
	rtc_write (0x02, rtc_read (0x02) & 0x7F);

	/* reset all alarms */
	rtc_write (0x09, 0x00);
	rtc_write (0x0A, 0x00);
	rtc_write (0x0B, 0x00);
	rtc_write (0x0C, 0x00);
}

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

static uchar rtc_read (uchar reg)
{
	return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
}

static void rtc_write (uchar reg, uchar val)
{
	i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
}
#else
static int pcf8563_rtc_get(struct udevice *dev, struct rtc_time *tmp)
{
	int rel = 0;
	uchar sec, min, hour, mday, wday, mon_cent, year;

	sec	= dm_i2c_reg_read(dev, 0x02);
	min	= dm_i2c_reg_read(dev, 0x03);
	hour	= dm_i2c_reg_read(dev, 0x04);
	mday	= dm_i2c_reg_read(dev, 0x05);
	wday	= dm_i2c_reg_read(dev, 0x06);
	mon_cent = dm_i2c_reg_read(dev, 0x07);
	year	= dm_i2c_reg_read(dev, 0x08);

	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x ",
	      year, mon_cent, mday, wday);
	debug("hr: %02x min: %02x sec: %02x\n",
	      hour, min, sec);
	debug("Alarms: wday: %02x day: %02x hour: %02x min: %02x\n",
	      dm_i2c_reg_read(dev, 0x0C),
	      dm_i2c_reg_read(dev, 0x0B),
	      dm_i2c_reg_read(dev, 0x0A),
	      dm_i2c_reg_read(dev, 0x09));

	if (sec & 0x80) {
		puts("### Warning: RTC Low Voltage - date/time not reliable\n");
		rel = -1;
	}

	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_cent & 0x1F);
	tmp->tm_year = bcd2bin(year) + ((mon_cent & 0x80) ? 1900 : 2000);
	tmp->tm_wday = bcd2bin(wday & 0x07);
	tmp->tm_yday = 0;
	tmp->tm_isdst = 0;

	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 rel;
}

static int pcf8563_rtc_set(struct udevice *dev, const struct rtc_time *tmp)
{
	uchar century;

	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);

	dm_i2c_reg_write(dev, 0x08, bin2bcd(tmp->tm_year % 100));

	century = (tmp->tm_year >= 2000) ? 0 : 0x80;
	dm_i2c_reg_write(dev, 0x07, bin2bcd(tmp->tm_mon) | century);

	dm_i2c_reg_write(dev, 0x06, bin2bcd(tmp->tm_wday));
	dm_i2c_reg_write(dev, 0x05, bin2bcd(tmp->tm_mday));
	dm_i2c_reg_write(dev, 0x04, bin2bcd(tmp->tm_hour));
	dm_i2c_reg_write(dev, 0x03, bin2bcd(tmp->tm_min));
	dm_i2c_reg_write(dev, 0x02, bin2bcd(tmp->tm_sec));

	return 0;
}

static int pcf8563_rtc_reset(struct udevice *dev)
{
	/* clear all control & status registers */
	dm_i2c_reg_write(dev, 0x00, 0x00);
	dm_i2c_reg_write(dev, 0x01, 0x00);
	dm_i2c_reg_write(dev, 0x0D, 0x00);

	/* clear Voltage Low bit */
	dm_i2c_reg_write(dev, 0x02, dm_i2c_reg_read(dev, 0x02) & 0x7F);

	/* reset all alarms */
	dm_i2c_reg_write(dev, 0x09, 0x00);
	dm_i2c_reg_write(dev, 0x0A, 0x00);
	dm_i2c_reg_write(dev, 0x0B, 0x00);
	dm_i2c_reg_write(dev, 0x0C, 0x00);

	return 0;
}

static const struct rtc_ops pcf8563_rtc_ops = {
	.get = pcf8563_rtc_get,
	.set = pcf8563_rtc_set,
	.reset = pcf8563_rtc_reset,
};

static const struct udevice_id pcf8563_rtc_ids[] = {
	{ .compatible = "nxp,pcf8563" },
	{ }
};

U_BOOT_DRIVER(rtc_pcf8563) = {
	.name   = "rtc-pcf8563",
	.id     = UCLASS_RTC,
	.of_match = pcf8563_rtc_ids,
	.ops    = &pcf8563_rtc_ops,
};
#endif
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
fe8c2806 WD	2	/*
	3	* (C) Copyright 2001
	4	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
fe8c2806 WD	5	*/
	6
	7	/*
	8	* Date & Time support for Philips PCF8563 RTC
	9	*/
	10
	11	/* #define DEBUG */
	12
d678a59d	13	#include <common.h>
fe8c2806	14	#include <command.h>
42cd5cbc	15	#include <dm.h>
f7ae49fc	16	#include <log.h>
fe8c2806 WD	17	#include <rtc.h>
	18	#include <i2c.h>
	19
42cd5cbc	20	#if !CONFIG_IS_ENABLED(DM_RTC)
fe8c2806 WD	21	static uchar rtc_read (uchar reg);
fe8c2806 WD	22	static void rtc_write (uchar reg, uchar val);
fe8c2806 WD	23
	24	/* ------------------------------------------------------------------------- */
	25
b73a19e1	26	int rtc_get (struct rtc_time *tmp)
fe8c2806	27	{
b73a19e1	28	int rel = 0;
fe8c2806 WD	29	uchar sec, min, hour, mday, wday, mon_cent, year;
	30
	31	sec = rtc_read (0x02);
	32	min = rtc_read (0x03);
	33	hour = rtc_read (0x04);
	34	mday = rtc_read (0x05);
	35	wday = rtc_read (0x06);
	36	mon_cent= rtc_read (0x07);
	37	year = rtc_read (0x08);
	38
	39	debug ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
	40	"hr: %02x min: %02x sec: %02x\n",
	41	year, mon_cent, mday, wday,
	42	hour, min, sec );
	43	debug ( "Alarms: wday: %02x day: %02x hour: %02x min: %02x\n",
	44	rtc_read (0x0C),
	45	rtc_read (0x0B),
	46	rtc_read (0x0A),
	47	rtc_read (0x09) );
	48
	49	if (sec & 0x80) {
4b9206ed	50	puts ("### Warning: RTC Low Voltage - date/time not reliable\n");
b73a19e1	51	rel = -1;
fe8c2806 WD	52	}
	53
	54	tmp->tm_sec = bcd2bin (sec & 0x7F);
	55	tmp->tm_min = bcd2bin (min & 0x7F);
	56	tmp->tm_hour = bcd2bin (hour & 0x3F);
	57	tmp->tm_mday = bcd2bin (mday & 0x3F);
	58	tmp->tm_mon = bcd2bin (mon_cent & 0x1F);
df930e9b	59	tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 1900 : 2000);
fe8c2806 WD	60	tmp->tm_wday = bcd2bin (wday & 0x07);
	61	tmp->tm_yday = 0;
	62	tmp->tm_isdst= 0;
	63
	64	debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	65	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	66	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
b73a19e1 YT	67
b73a19e1 YT	68	return rel;
fe8c2806 WD	69	}
fe8c2806 WD	70
d1e23194	71	int rtc_set (struct rtc_time *tmp)
fe8c2806 WD	72	{
	73	uchar century;
	74
	75	debug ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	76	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	77	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	78
	79	rtc_write (0x08, bin2bcd(tmp->tm_year % 100));
	80
df930e9b	81	century = (tmp->tm_year >= 2000) ? 0 : 0x80;
fe8c2806 WD	82	rtc_write (0x07, bin2bcd(tmp->tm_mon) \| century);
	83
	84	rtc_write (0x06, bin2bcd(tmp->tm_wday));
	85	rtc_write (0x05, bin2bcd(tmp->tm_mday));
	86	rtc_write (0x04, bin2bcd(tmp->tm_hour));
	87	rtc_write (0x03, bin2bcd(tmp->tm_min ));
	88	rtc_write (0x02, bin2bcd(tmp->tm_sec ));
d1e23194 JCPV	89
d1e23194 JCPV	90	return 0;
fe8c2806 WD	91	}
	92
	93	void rtc_reset (void)
	94	{
	95	/* clear all control & status registers */
	96	rtc_write (0x00, 0x00);
	97	rtc_write (0x01, 0x00);
	98	rtc_write (0x0D, 0x00);
	99
	100	/* clear Voltage Low bit */
	101	rtc_write (0x02, rtc_read (0x02) & 0x7F);
	102
	103	/* reset all alarms */
	104	rtc_write (0x09, 0x00);
	105	rtc_write (0x0A, 0x00);
	106	rtc_write (0x0B, 0x00);
	107	rtc_write (0x0C, 0x00);
	108	}
	109
	110	/* ------------------------------------------------------------------------- */
	111
	112	static uchar rtc_read (uchar reg)
	113	{
65cc0e2a	114	return (i2c_reg_read (CFG_SYS_I2C_RTC_ADDR, reg));
fe8c2806 WD	115	}
	116
	117	static void rtc_write (uchar reg, uchar val)
	118	{
65cc0e2a	119	i2c_reg_write (CFG_SYS_I2C_RTC_ADDR, reg, val);
fe8c2806	120	}
42cd5cbc BL	121	#else
	122	static int pcf8563_rtc_get(struct udevice dev, struct rtc_time tmp)
	123	{
	124	int rel = 0;
	125	uchar sec, min, hour, mday, wday, mon_cent, year;
	126
	127	sec = dm_i2c_reg_read(dev, 0x02);
	128	min = dm_i2c_reg_read(dev, 0x03);
	129	hour = dm_i2c_reg_read(dev, 0x04);
	130	mday = dm_i2c_reg_read(dev, 0x05);
	131	wday = dm_i2c_reg_read(dev, 0x06);
	132	mon_cent = dm_i2c_reg_read(dev, 0x07);
	133	year = dm_i2c_reg_read(dev, 0x08);
	134
	135	debug("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x ",
	136	year, mon_cent, mday, wday);
	137	debug("hr: %02x min: %02x sec: %02x\n",
	138	hour, min, sec);
	139	debug("Alarms: wday: %02x day: %02x hour: %02x min: %02x\n",
	140	dm_i2c_reg_read(dev, 0x0C),
	141	dm_i2c_reg_read(dev, 0x0B),
	142	dm_i2c_reg_read(dev, 0x0A),
	143	dm_i2c_reg_read(dev, 0x09));
	144
	145	if (sec & 0x80) {
	146	puts("### Warning: RTC Low Voltage - date/time not reliable\n");
	147	rel = -1;
	148	}
	149
	150	tmp->tm_sec = bcd2bin(sec & 0x7F);
	151	tmp->tm_min = bcd2bin(min & 0x7F);
	152	tmp->tm_hour = bcd2bin(hour & 0x3F);
	153	tmp->tm_mday = bcd2bin(mday & 0x3F);
	154	tmp->tm_mon = bcd2bin(mon_cent & 0x1F);
	155	tmp->tm_year = bcd2bin(year) + ((mon_cent & 0x80) ? 1900 : 2000);
	156	tmp->tm_wday = bcd2bin(wday & 0x07);
	157	tmp->tm_yday = 0;
	158	tmp->tm_isdst = 0;
	159
	160	debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	161	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	162	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	163
	164	return rel;
	165	}
	166
	167	static int pcf8563_rtc_set(struct udevice dev, const struct rtc_time tmp)
	168	{
	169	uchar century;
	170
	171	debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
	172	tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
	173	tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
	174
	175	dm_i2c_reg_write(dev, 0x08, bin2bcd(tmp->tm_year % 100));
	176
	177	century = (tmp->tm_year >= 2000) ? 0 : 0x80;
	178	dm_i2c_reg_write(dev, 0x07, bin2bcd(tmp->tm_mon) \| century);
	179
	180	dm_i2c_reg_write(dev, 0x06, bin2bcd(tmp->tm_wday));
	181	dm_i2c_reg_write(dev, 0x05, bin2bcd(tmp->tm_mday));
	182	dm_i2c_reg_write(dev, 0x04, bin2bcd(tmp->tm_hour));
	183	dm_i2c_reg_write(dev, 0x03, bin2bcd(tmp->tm_min));
	184	dm_i2c_reg_write(dev, 0x02, bin2bcd(tmp->tm_sec));
185
186	return 0;
187	}
188
189	static int pcf8563_rtc_reset(struct udevice *dev)
190	{
191	/* clear all control & status registers */
192	dm_i2c_reg_write(dev, 0x00, 0x00);
193	dm_i2c_reg_write(dev, 0x01, 0x00);
194	dm_i2c_reg_write(dev, 0x0D, 0x00);
195
196	/* clear Voltage Low bit */
197	dm_i2c_reg_write(dev, 0x02, dm_i2c_reg_read(dev, 0x02) & 0x7F);
198
199	/* reset all alarms */
200	dm_i2c_reg_write(dev, 0x09, 0x00);
201	dm_i2c_reg_write(dev, 0x0A, 0x00);
202	dm_i2c_reg_write(dev, 0x0B, 0x00);
203	dm_i2c_reg_write(dev, 0x0C, 0x00);
204
205	return 0;
206	}
207
208	static const struct rtc_ops pcf8563_rtc_ops = {
209	.get = pcf8563_rtc_get,
210	.set = pcf8563_rtc_set,
211	.reset = pcf8563_rtc_reset,
212	};
213
214	static const struct udevice_id pcf8563_rtc_ids[] = {
215	{ .compatible = "nxp,pcf8563" },
216	{ }
217	};
218
219	U_BOOT_DRIVER(rtc_pcf8563) = {
220	.name = "rtc-pcf8563",
221	.id = UCLASS_RTC,
222	.of_match = pcf8563_rtc_ids,
223	.ops = &pcf8563_rtc_ops,
224	};
225	#endif