Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 362 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/rtc/ds1307.c b/roms/u-boot/drivers/rtc/ds1307.c
new file mode 100644
index 000000000..2015ce9bb
--- /dev/null
+++ b/roms/u-boot/drivers/rtc/ds1307.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2001, 2002, 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * Keith Outwater, keith_outwater@mvis.com`
+ * Steven Scholz, steven.scholz@imc-berlin.de
+ */
+
+/*
+ * Date & Time support (no alarms) for Dallas Semiconductor (now Maxim)
+ * DS1307 and DS1338/9 Real Time Clock (RTC).
+ *
+ * based on ds1337.c
+ */
+
+#include <common.h>
+#include <command.h>
+#include <dm.h>
+#include <log.h>
+#include <rtc.h>
+#include <i2c.h>
+
+enum ds_type {
+	ds_1307,
+	ds_1337,
+	ds_1339,
+	ds_1340,
+	m41t11,
+	mcp794xx,
+};
+
+/*
+ * RTC register addresses
+ */
+#define RTC_SEC_REG_ADDR	0x00
+#define RTC_MIN_REG_ADDR	0x01
+#define RTC_HR_REG_ADDR		0x02
+#define RTC_DAY_REG_ADDR	0x03
+#define RTC_DATE_REG_ADDR	0x04
+#define RTC_MON_REG_ADDR	0x05
+#define RTC_YR_REG_ADDR		0x06
+#define RTC_CTL_REG_ADDR	0x07
+
+#define RTC_SEC_BIT_CH		0x80	/* Clock Halt (in Register 0)   */
+
+#define RTC_CTL_BIT_RS0		0x01	/* Rate select 0                */
+#define RTC_CTL_BIT_RS1		0x02	/* Rate select 1                */
+#define RTC_CTL_BIT_SQWE	0x10	/* Square Wave Enable           */
+#define RTC_CTL_BIT_OUT		0x80	/* Output Control               */
+
+/* MCP7941X-specific bits */
+#define MCP7941X_BIT_ST		0x80
+#define MCP7941X_BIT_VBATEN	0x08
+
+#ifndef CONFIG_DM_RTC
+
+/*---------------------------------------------------------------------*/
+#undef DEBUG_RTC
+
+#ifdef DEBUG_RTC
+#define DEBUGR(fmt, args...) printf(fmt, ##args)
+#else
+#define DEBUGR(fmt, args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+#ifndef CONFIG_SYS_I2C_RTC_ADDR
+# define CONFIG_SYS_I2C_RTC_ADDR	0x68
+#endif
+
+#if defined(CONFIG_RTC_DS1307) && (CONFIG_SYS_I2C_SPEED > 100000)
+# error The DS1307 is specified only up to 100kHz!
+#endif
+
+static uchar rtc_read (uchar reg);
+static void rtc_write (uchar reg, uchar val);
+
+/*
+ * Get the current time from the RTC
+ */
+int rtc_get (struct rtc_time *tmp)
+{
+	int rel = 0;
+	uchar sec, min, hour, mday, wday, mon, year;
+
+#ifdef CONFIG_RTC_MCP79411
+read_rtc:
+#endif
+	sec = rtc_read (RTC_SEC_REG_ADDR);
+	min = rtc_read (RTC_MIN_REG_ADDR);
+	hour = rtc_read (RTC_HR_REG_ADDR);
+	wday = rtc_read (RTC_DAY_REG_ADDR);
+	mday = rtc_read (RTC_DATE_REG_ADDR);
+	mon = rtc_read (RTC_MON_REG_ADDR);
+	year = rtc_read (RTC_YR_REG_ADDR);
+
+	DEBUGR ("Get RTC year: %02x mon: %02x mday: %02x wday: %02x "
+		"hr: %02x min: %02x sec: %02x\n",
+		year, mon, mday, wday, hour, min, sec);
+
+#ifdef CONFIG_RTC_DS1307
+	if (sec & RTC_SEC_BIT_CH) {
+		printf ("### Warning: RTC oscillator has stopped\n");
+		/* clear the CH flag */
+		rtc_write (RTC_SEC_REG_ADDR,
+			   rtc_read (RTC_SEC_REG_ADDR) & ~RTC_SEC_BIT_CH);
+		rel = -1;
+	}
+#endif
+
+#ifdef CONFIG_RTC_MCP79411
+	/* make sure that the backup battery is enabled */
+	if (!(wday & MCP7941X_BIT_VBATEN)) {
+		rtc_write(RTC_DAY_REG_ADDR,
+			  wday | MCP7941X_BIT_VBATEN);
+	}
+
+	/* clock halted?  turn it on, so clock can tick. */
+	if (!(sec & MCP7941X_BIT_ST)) {
+		rtc_write(RTC_SEC_REG_ADDR, MCP7941X_BIT_ST);
+		printf("Started RTC\n");
+		goto read_rtc;
+	}
+#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) + ( bcd2bin (year) >= 70 ? 1900 : 2000);
+	tmp->tm_wday = bcd2bin ((wday - 1) & 0x07);
+	tmp->tm_yday = 0;
+	tmp->tm_isdst= 0;
+
+	DEBUGR ("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;
+}
+
+
+/*
+ * Set the RTC
+ */
+int rtc_set (struct rtc_time *tmp)
+{
+	DEBUGR ("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);
+
+	if (tmp->tm_year < 1970 || tmp->tm_year > 2069)
+		printf("WARNING: year should be between 1970 and 2069!\n");
+
+	rtc_write (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100));
+	rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon));
+#ifdef CONFIG_RTC_MCP79411
+	rtc_write (RTC_DAY_REG_ADDR,
+		   bin2bcd (tmp->tm_wday + 1) | MCP7941X_BIT_VBATEN);
+#else
+	rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday + 1));
+#endif
+	rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday));
+	rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
+	rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
+#ifdef CONFIG_RTC_MCP79411
+	rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec) | MCP7941X_BIT_ST);
+#else
+	rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));
+#endif
+
+	return 0;
+}
+
+
+/*
+ * Reset the RTC. We setting the date back to 1970-01-01.
+ * We also enable the oscillator output on the SQW/OUT pin and program
+ * it for 32,768 Hz output. Note that according to the datasheet, turning
+ * on the square wave output increases the current drain on the backup
+ * battery to something between 480nA and 800nA.
+ */
+void rtc_reset (void)
+{
+	rtc_write (RTC_SEC_REG_ADDR, 0x00);	/* clearing Clock Halt	*/
+	rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_SQWE | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS0);
+}
+
+
+/*
+ * Helper functions
+ */
+
+static
+uchar rtc_read (uchar reg)
+{
+	return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
+}
+
+
+static void rtc_write (uchar reg, uchar val)
+{
+	i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
+}
+
+#endif /* !CONFIG_DM_RTC */
+
+#ifdef CONFIG_DM_RTC
+static int ds1307_rtc_set(struct udevice *dev, const struct rtc_time *tm)
+{
+	int ret;
+	uchar buf[7];
+	enum ds_type type = dev_get_driver_data(dev);
+
+	debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+	      tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
+	      tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	if (tm->tm_year < 1970 || tm->tm_year > 2069)
+		printf("WARNING: year should be between 1970 and 2069!\n");
+
+	buf[RTC_YR_REG_ADDR] = bin2bcd(tm->tm_year % 100);
+	buf[RTC_MON_REG_ADDR] = bin2bcd(tm->tm_mon);
+	buf[RTC_DAY_REG_ADDR] = bin2bcd(tm->tm_wday + 1);
+	buf[RTC_DATE_REG_ADDR] = bin2bcd(tm->tm_mday);
+	buf[RTC_HR_REG_ADDR] = bin2bcd(tm->tm_hour);
+	buf[RTC_MIN_REG_ADDR] = bin2bcd(tm->tm_min);
+	buf[RTC_SEC_REG_ADDR] = bin2bcd(tm->tm_sec);
+
+	if (type == mcp794xx) {
+		buf[RTC_DAY_REG_ADDR] |= MCP7941X_BIT_VBATEN;
+		buf[RTC_SEC_REG_ADDR] |= MCP7941X_BIT_ST;
+	}
+
+	ret = dm_i2c_write(dev, 0, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int ds1307_rtc_get(struct udevice *dev, struct rtc_time *tm)
+{
+	int ret;
+	uchar buf[7];
+	enum ds_type type = dev_get_driver_data(dev);
+
+read_rtc:
+	ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	if (type == ds_1307) {
+		if (buf[RTC_SEC_REG_ADDR] & RTC_SEC_BIT_CH) {
+			printf("### Warning: RTC oscillator has stopped\n");
+			/* clear the CH flag */
+			buf[RTC_SEC_REG_ADDR] &= ~RTC_SEC_BIT_CH;
+			dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
+					 buf[RTC_SEC_REG_ADDR]);
+			return -1;
+		}
+	}
+
+	if (type == m41t11) {
+		/* clock halted?  turn it on, so clock can tick. */
+		if (buf[RTC_SEC_REG_ADDR] & RTC_SEC_BIT_CH) {
+			buf[RTC_SEC_REG_ADDR] &= ~RTC_SEC_BIT_CH;
+			dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
+					 MCP7941X_BIT_ST);
+			dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
+					 buf[RTC_SEC_REG_ADDR]);
+			goto read_rtc;
+		}
+	}
+
+	if (type == mcp794xx) {
+		/* make sure that the backup battery is enabled */
+		if (!(buf[RTC_DAY_REG_ADDR] & MCP7941X_BIT_VBATEN)) {
+			dm_i2c_reg_write(dev, RTC_DAY_REG_ADDR,
+					 buf[RTC_DAY_REG_ADDR] |
+					 MCP7941X_BIT_VBATEN);
+		}
+
+		/* clock halted?  turn it on, so clock can tick. */
+		if (!(buf[RTC_SEC_REG_ADDR] & MCP7941X_BIT_ST)) {
+			dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
+					 MCP7941X_BIT_ST);
+			printf("Started RTC\n");
+			goto read_rtc;
+		}
+	}
+
+	tm->tm_sec  = bcd2bin(buf[RTC_SEC_REG_ADDR] & 0x7F);
+	tm->tm_min  = bcd2bin(buf[RTC_MIN_REG_ADDR] & 0x7F);
+	tm->tm_hour = bcd2bin(buf[RTC_HR_REG_ADDR] & 0x3F);
+	tm->tm_mday = bcd2bin(buf[RTC_DATE_REG_ADDR] & 0x3F);
+	tm->tm_mon  = bcd2bin(buf[RTC_MON_REG_ADDR] & 0x1F);
+	tm->tm_year = bcd2bin(buf[RTC_YR_REG_ADDR]) +
+			      (bcd2bin(buf[RTC_YR_REG_ADDR]) >= 70 ?
+			       1900 : 2000);
+	tm->tm_wday = bcd2bin((buf[RTC_DAY_REG_ADDR] - 1) & 0x07);
+	tm->tm_yday = 0;
+	tm->tm_isdst = 0;
+
+	debug("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+	      tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
+	      tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+	return 0;
+}
+
+static int ds1307_rtc_reset(struct udevice *dev)
+{
+	int ret;
+
+	/* clear Clock Halt */
+	ret = dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR, 0x00);
+	if (ret < 0)
+		return ret;
+	ret = dm_i2c_reg_write(dev, RTC_CTL_REG_ADDR,
+			       RTC_CTL_BIT_SQWE | RTC_CTL_BIT_RS1 |
+			       RTC_CTL_BIT_RS0);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int ds1307_probe(struct udevice *dev)
+{
+	i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS |
+			   DM_I2C_CHIP_WR_ADDRESS);
+
+	return 0;
+}
+
+static const struct rtc_ops ds1307_rtc_ops = {
+	.get = ds1307_rtc_get,
+	.set = ds1307_rtc_set,
+	.reset = ds1307_rtc_reset,
+};
+
+static const struct udevice_id ds1307_rtc_ids[] = {
+	{ .compatible = "dallas,ds1307", .data = ds_1307 },
+	{ .compatible = "dallas,ds1337", .data = ds_1337 },
+	{ .compatible = "dallas,ds1339", .data = ds_1339 },
+	{ .compatible = "dallas,ds1340", .data = ds_1340 },
+	{ .compatible = "microchip,mcp7941x", .data = mcp794xx },
+	{ .compatible = "st,m41t11", .data = m41t11 },
+	{ }
+};
+
+U_BOOT_DRIVER(rtc_ds1307) = {
+	.name	= "rtc-ds1307",
+	.id	= UCLASS_RTC,
+	.probe	= ds1307_probe,
+	.of_match = ds1307_rtc_ids,
+	.ops	= &ds1307_rtc_ops,
+};
+#endif /* CONFIG_DM_RTC */