Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 143 insertions, 0 deletions

diff --git a/arch/sh/boards/mach-sh03/rtc.c b/arch/sh/boards/mach-sh03/rtc.c
new file mode 100644
index 000000000..7fb474844
--- /dev/null
+++ b/arch/sh/boards/mach-sh03/rtc.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/arch/sh/boards/sh03/rtc.c -- CTP/PCI-SH03 on-chip RTC support
+ *
+ *  Copyright (C) 2004  Saito.K & Jeanne(ksaito@interface.co.jp)
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/bcd.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+
+#define RTC_BASE	0xb0000000
+#define RTC_SEC1	(RTC_BASE + 0)
+#define RTC_SEC10	(RTC_BASE + 1)
+#define RTC_MIN1	(RTC_BASE + 2)
+#define RTC_MIN10	(RTC_BASE + 3)
+#define RTC_HOU1	(RTC_BASE + 4)
+#define RTC_HOU10	(RTC_BASE + 5)
+#define RTC_WEE1	(RTC_BASE + 6)
+#define RTC_DAY1	(RTC_BASE + 7)
+#define RTC_DAY10	(RTC_BASE + 8)
+#define RTC_MON1	(RTC_BASE + 9)
+#define RTC_MON10	(RTC_BASE + 10)
+#define RTC_YEA1	(RTC_BASE + 11)
+#define RTC_YEA10	(RTC_BASE + 12)
+#define RTC_YEA100	(RTC_BASE + 13)
+#define RTC_YEA1000	(RTC_BASE + 14)
+#define RTC_CTL		(RTC_BASE + 15)
+#define RTC_BUSY	1
+#define RTC_STOP	2
+
+static DEFINE_SPINLOCK(sh03_rtc_lock);
+
+static int sh03_rtc_gettimeofday(struct device *dev, struct rtc_time *tm)
+{
+	unsigned int year, mon, day, hour, min, sec;
+
+	spin_lock(&sh03_rtc_lock);
+ again:
+	do {
+		sec  = (__raw_readb(RTC_SEC1) & 0xf) + (__raw_readb(RTC_SEC10) & 0x7) * 10;
+		min  = (__raw_readb(RTC_MIN1) & 0xf) + (__raw_readb(RTC_MIN10) & 0xf) * 10;
+		hour = (__raw_readb(RTC_HOU1) & 0xf) + (__raw_readb(RTC_HOU10) & 0xf) * 10;
+		day  = (__raw_readb(RTC_DAY1) & 0xf) + (__raw_readb(RTC_DAY10) & 0xf) * 10;
+		mon  = (__raw_readb(RTC_MON1) & 0xf) + (__raw_readb(RTC_MON10) & 0xf) * 10;
+		year = (__raw_readb(RTC_YEA1) & 0xf) + (__raw_readb(RTC_YEA10) & 0xf) * 10
+		     + (__raw_readb(RTC_YEA100 ) & 0xf) * 100
+		     + (__raw_readb(RTC_YEA1000) & 0xf) * 1000;
+	} while (sec != (__raw_readb(RTC_SEC1) & 0xf) + (__raw_readb(RTC_SEC10) & 0x7) * 10);
+	if (year == 0 || mon < 1 || mon > 12 || day > 31 || day < 1 ||
+	    hour > 23 || min > 59 || sec > 59) {
+		printk(KERN_ERR
+		       "SH-03 RTC: invalid value, resetting to 1 Jan 2000\n");
+		printk("year=%d, mon=%d, day=%d, hour=%d, min=%d, sec=%d\n",
+		       year, mon, day, hour, min, sec);
+
+		__raw_writeb(0, RTC_SEC1); __raw_writeb(0, RTC_SEC10);
+		__raw_writeb(0, RTC_MIN1); __raw_writeb(0, RTC_MIN10);
+		__raw_writeb(0, RTC_HOU1); __raw_writeb(0, RTC_HOU10);
+		__raw_writeb(6, RTC_WEE1);
+		__raw_writeb(1, RTC_DAY1); __raw_writeb(0, RTC_DAY10);
+		__raw_writeb(1, RTC_MON1); __raw_writeb(0, RTC_MON10);
+		__raw_writeb(0, RTC_YEA1); __raw_writeb(0, RTC_YEA10);
+		__raw_writeb(0, RTC_YEA100);
+		__raw_writeb(2, RTC_YEA1000);
+		__raw_writeb(0, RTC_CTL);
+		goto again;
+	}
+
+	spin_unlock(&sh03_rtc_lock);
+
+	tm->tm_sec  = sec;
+	tm->tm_min  = min;
+	tm->tm_hour = hour;
+	tm->tm_mday = day;
+	tm->tm_mon  = mon;
+	tm->tm_year = year - 1900;
+
+	return 0;
+}
+
+static int set_rtc_mmss(struct rtc_time *tm)
+{
+	int retval = 0;
+	int real_seconds, real_minutes, cmos_minutes;
+	int i;
+
+	/* gets recalled with irq locally disabled */
+	spin_lock(&sh03_rtc_lock);
+	for (i = 0 ; i < 1000000 ; i++)	/* may take up to 1 second... */
+		if (!(__raw_readb(RTC_CTL) & RTC_BUSY))
+			break;
+	cmos_minutes = (__raw_readb(RTC_MIN1) & 0xf) + (__raw_readb(RTC_MIN10) & 0xf) * 10;
+	real_seconds = tm->tm_sec;
+	real_minutes = tm->tm_min;
+	if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
+		real_minutes += 30;		/* correct for half hour time zone */
+	real_minutes %= 60;
+
+	if (abs(real_minutes - cmos_minutes) < 30) {
+		__raw_writeb(real_seconds % 10, RTC_SEC1);
+		__raw_writeb(real_seconds / 10, RTC_SEC10);
+		__raw_writeb(real_minutes % 10, RTC_MIN1);
+		__raw_writeb(real_minutes / 10, RTC_MIN10);
+	} else {
+		printk_once(KERN_NOTICE
+		       "set_rtc_mmss: can't update from %d to %d\n",
+		       cmos_minutes, real_minutes);
+		retval = -EINVAL;
+	}
+	spin_unlock(&sh03_rtc_lock);
+
+	return retval;
+}
+
+int sh03_rtc_settimeofday(struct device *dev, struct rtc_time *tm)
+{
+	return set_rtc_mmss(tm);
+}
+
+static const struct rtc_class_ops rtc_generic_ops = {
+	.read_time = sh03_rtc_gettimeofday,
+	.set_time = sh03_rtc_settimeofday,
+};
+
+static int __init sh03_time_init(void)
+{
+	struct platform_device *pdev;
+
+	pdev = platform_device_register_data(NULL, "rtc-generic", -1,
+					     &rtc_generic_ops,
+					     sizeof(rtc_generic_ops));
+
+	return PTR_ERR_OR_ZERO(pdev);
+}
+arch_initcall(sh03_time_init);