Add Real time clock support code.

sys/arch/powerpc/conf/files.ibm405gp

@@ -1,4 +1,4 @@
-#	$NetBSD: files.ibm405gp,v 1.2 2003/10/06 16:15:46 scw Exp $
+#	$NetBSD: files.ibm405gp,v 1.3 2003/10/06 18:15:08 shige Exp $
 #
 # IBM 405GPx specific configuration info
 
@@ -19,3 +19,6 @@ file	arch/powerpc/ibm4xx/dev/ibm405gp.c
 device	gpiic: i2cbus, i2c_bitbang
 attach	gpiic at opb
 file	arch/powerpc/ibm4xx/dev/gpiic_opb.c	gpiic
+
+# Real time clock support
+file	arch/powerpc/ibm4xx/dev/rtc.c

sys/arch/powerpc/ibm4xx/dev/rtc.c

@@ -0,0 +1,107 @@
+/*	$NetBSD: rtc.c,v 1.1 2003/10/06 18:15:08 shige Exp $	*/
+/*	Original:	src/sys/arch/acorn26/ioc/rtc.c	*/
+/*	Original Tag:	rtc.c,v 1.7 2003/09/30 00:35:30 thorpej Exp	*/
+
+/*
+ * Copyright (c) 2000 Ben Harris
+ * Copyright (c) 1994-1996 Mark Brinicombe.
+ * Copyright (c) 1994 Brini.
+ * All rights reserved.
+ *
+ * This code is derived from software written for Brini by Mark Brinicombe
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Brini.
+ * 4. The name of the company nor the name of the author may be used to
+ *    endorse or promote products derived from this software without specific
+ *    prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: rtc.c,v 1.1 2003/10/06 18:15:08 shige Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+#include <dev/clock_subr.h>
+
+todr_chip_handle_t todr_handle;
+
+void
+todr_attach(todr_chip_handle_t todr)
+{
+
+	if (todr_handle)
+		panic("todr_attach: rtc already configured");
+	todr_handle = todr;
+}
+
+void
+inittodr(time_t base)
+{
+	int check;
+	struct timeval todrtime;
+
+	check = 0;
+	if (todr_handle == NULL) {
+		printf("inittodr: rtc not present");
+		time.tv_sec = base;
+		time.tv_usec = 0;
+		check = 1;
+	} else {
+		if (todr_gettime(todr_handle, &todrtime) != 0) {
+			printf("inittodr: Error reading clock");
+			time.tv_sec = base;
+			time.tv_usec = 0;
+			check = 1;
+		} else {
+			time = todrtime;
+			if (time.tv_sec > base + 3 * SECDAY) {
+				printf("inittodr: Clock has gained %ld days",
+				       (time.tv_sec - base) / SECDAY);
+				check = 1;
+			} else if (time.tv_sec + SECDAY < base) {
+				printf("inittodr: Clock has lost %ld day(s)",
+				       (base - time.tv_sec) / SECDAY);
+				check = 1;
+			}
+		}
+	}
+	if (check)
+		printf(" - CHECK AND RESET THE DATE.\n");
+}
+
+void
+resettodr(void)
+{
+
+	if (time.tv_sec == 0)
+		return;
+
+	if (todr_handle != NULL &&
+	    todr_settime(todr_handle, (struct timeval *)&time) != 0)
+		printf("resettodr: failed to set time\n");
+}