DS1553 RTC module driver. On the MPC8555CDS system it hangs off of the LBC bus.

Obtained from:	Semihalf

1 files changed, 107 insertions, 0 deletions

diff --git a/sys/powerpc/mpc85xx/ds1553_reg.h b/sys/powerpc/mpc85xx/ds1553_reg.h
new file mode 100644
index 0000000..efe4264c
--- /dev/null
+++ b/sys/powerpc/mpc85xx/ds1553_reg.h
@@ -0,0 +1,107 @@
+/*-
+ * Copyright (C) 2006-2008 Semihalf, Grzegorz Bernacki
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _DEV_RTC_DS1553_H_
+#define _DEV_RTC_DS1553_H_
+
+/* DS1553 registers */
+#define DS1553_NVRAM_SIZE		0x1ff0
+#define DS1553_OFF_FLAGS		0x1ff0
+#define DS1553_OFF_ALARM_SECONDS	0x1ff2
+#define DS1553_OFF_ALARM_MINUTES	0x1ff3
+#define DS1553_OFF_ALARM_HOURS		0x1ff4
+#define DS1553_OFF_ALARM_DATE		0x1ff5
+#define DS1553_OFF_INTERRUPTS		0x1ff6
+#define DS1553_OFF_WATCHDOG		0x1ff7
+#define DS1553_OFF_CONTROL		0x1ff8
+#define DS1553_OFF_SECONDS		0x1ff9
+#define DS1553_OFF_MINUTES		0x1ffa
+#define DS1553_OFF_HOURS		0x1ffb
+#define DS1553_OFF_DAYOFWEEK		0x1ffc
+#define DS1553_OFF_DATE			0x1ffd
+#define DS1553_OFF_MONTH		0x1ffe
+#define DS1553_OFF_YEAR			0x1fff
+
+/* dayofweek register's bits */
+#define DS1553_BIT_FREQ_TEST		0x40 /* frequency test bit */
+
+/* seconds register's bit */
+#define DS1553_BIT_OSC			0x80 /* oscillator start/stop bit */
+
+/* control register's bits */
+#define DS1553_BIT_WRITE		0x80 /* write */
+#define DS1553_BIT_READ			0x40 /* read */
+
+/* watchdog register's bits */
+#define DS1553_BIT_WATCHDOG		0x80 /* watchdog steering bit */
+#define DS1553_BIT_BMB4			0x40 /* watchdog multiplier bit4 */
+#define DS1553_BIT_BMB3			0x20 /* watchdog multiplier bit3 */
+#define DS1553_BIT_BMB2			0x10 /* watchdog multiplier bit2 */
+#define DS1553_BIT_BMB1			0x8  /* watchdog multiplier bit1 */
+#define DS1553_BIT_BMB0			0x4  /* watchdog multiplier bit0 */
+#define DS1553_BIT_RB1			0x2  /* watchdog resolution bit1 */
+#define DS1553_BIT_RB0			0x1  /* watchdog resolution bit0 */
+
+/* alarm seconds/minutes/hours/date register's bit */
+#define DS1553_BIT_AM			0x80 /* alarm mask bit */
+
+/* flag register's bits */
+#define DS1553_BIT_BLF			0x10 /* battery flag */
+#define DS1553_BIT_WF			0x80 /* watchdog flag */
+
+/* register's mask */
+#define DS1553_MASK_MONTH		0x1f
+#define DS1553_MASK_DATE		0x3f
+#define DS1553_MASK_DAYOFWEEK		0x7
+#define DS1553_MASK_HOUR		0x3f
+#define DS1553_MASK_MINUTES		0x7f
+#define DS1553_MASK_SECONDS		0x7f
+
+struct ds1553_softc {
+
+	bus_space_tag_t		sc_bst;	/* bus space tag */
+	bus_space_handle_t	sc_bsh;	/* bus space handle */
+
+	int			rid;	/* resource id */
+	struct resource		*res;
+	struct mtx		sc_mtx;	/* hardware mutex */
+
+	uint32_t		year_offset;
+	/* read/write functions */
+	uint8_t			(*sc_read)(device_t, bus_size_t);
+	void			(*sc_write)(device_t, bus_size_t, uint8_t);
+};
+
+/* device interface */
+int ds1553_attach(device_t);
+
+/* clock interface */
+int ds1553_gettime(device_t, struct timespec *);
+int ds1553_settime(device_t, struct timespec *);
+
+#endif /* _DEV_RTC_DS1553_H_ */