--- /dev/null
+/* $OpenBSD: dp857xreg.h,v 1.1 1997/02/19 20:17:01 pefo Exp $ */
+
+/*
+ * Copyright (c) 1996 Per Fogelstrom
+ *
+ * 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 under OpenBSD by
+ * Per Fogelstrom.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
+ *
+ */
+
+#if !defined(_DP857X_H)
+#define _DP857X_H
+
+/*
+ * Definition of Real Time Clock address space.
+ *
+ * Clock is a National DP8570A RTC
+ */
+#define BSIZE 1 /* No of Bytes for Address Spacing */
+#define MAIN_STATUS 0x00 /* Main status register */
+/*
+ * Registers selected with BS=0 RS=0
+ */
+#define TIMER0_CTRL 0x01 /* Timer 0 control register */
+#define TIMER1_CTRL 0x02 /* Timer 0 control register */
+#define PERIODIC_FLAGS 0x03 /* Timer periodic flag register */
+#define INTERRUPT_ROUT 0x04 /* Interrupt routing register */
+/*
+ * Registers selected with BS=0 RS=1
+ */
+#define REAL_TIME_MODE 0x01 /* Real Time Mode register */
+#define OUTPUT_MODE 0x02 /* Output mode register */
+#define INTERRUPT_CTRL0 0x03 /* Interrupt control register 0 */
+#define INTERRUPT_CTRL1 0x04 /* Interrupt control register 1 */
+/*
+ * Clock and timer registers when BS=0
+ */
+#define CLK_SUBSECONDS 0x05 /* 1/100 seconds reister */
+#define CLK_SECONDS 0x06 /* Seconds */
+#define CLK_MINUTES 0x07 /* Minutes */
+#define CLK_HOURS 0x08 /* Hours */
+#define CLK_DAY 0x09 /* Day of month */
+#define CLK_MONTH 0x0a /* Month */
+#define CLK_YEAR 0x0b /* Year */
+#define CLK_JULIAN_L 0x0c /* Lsb of Julian date */
+#define CLK_JULIAN_H 0x0d /* Msb of Julian date */
+#define CLK_WEEKDAY 0x0e /* Day of week */
+#define TIMER0_LSB 0x0f /* Timer 0 lsb */
+#define TIMER0_MSB 0x10 /* Timer 0 msb */
+#define TIMER1_LSB 0x11 /* Timer 1 lsb */
+#define TIMER1_MSB 0x12 /* Timer 1 msb */
+#define CMP_SECONDS 0x13 /* Seconds compare */
+#define CMP_MINUTES 0x14 /* Minutes compare */
+#define CMP_HOUR 0x15 /* Hours compare */
+#define CMP_DAY 0x16 /* Day of month compare */
+#define CMP_MONTH 0x17 /* Month compare */
+#define CMP_WEEKDAY 0x18 /* Day of week compare */
+#define SAVE_SECONDS 0x19 /* Seconds time save */
+#define SAVE_MINUTES 0x1a /* Minutes time save */
+#define SAVE_HOUR 0x1b /* Hours time save */
+#define SAVE_DAY 0x1c /* Day of month time save */
+#define SAVE_MONTH 0x1d /* Month time save */
+#define RAM_1E 0x1e /* Ram location 1e */
+#define RAM_1F 0x1f /* Ram location 1f */
+#define SIZE_DP857X 0x20 /* Size of dp address map */
+
+#define DP_FIRSTTODREG CLK_SUBSECONDS
+#define DP_LASTTODREG CLK_WEEKDAY
+
+typedef u_int dp_todregs[SIZE_DP857X];
+u_int dp857x_read __P((void *sc, u_int reg));
+void dp857x_write __P((void *sc, u_int reg, u_int datum));
+
+/*
+ * Get all of the TOD/Alarm registers
+ * Must be called at splhigh(), and with the RTC properly set up.
+ */
+#define DP857X_GETTOD(sc, regs) \
+ do { \
+ int i; \
+ \
+ /* make sure clock regs are selected */ \
+ dp857x_write(sc, MAIN_STATUS, 0); \
+ /* try read until no rollover */ \
+ do { \
+ /* read all of the tod/alarm regs */ \
+ for (i = DP_FIRSTTODREG; i < SIZE_DP857X; i++) \
+ (*regs)[i] = dp857x_read(sc, i); \
+ } while(dp857x_read(sc, PERIODIC_FLAGS) & 7); \
+ } while (0);
+
+/*
+ * Set all of the TOD/Alarm registers
+ * Must be called at splhigh(), and with the RTC properly set up.
+ */
+#define DP857X_PUTTOD(sc, regs) \
+ do { \
+ int i; \
+ \
+ /* stop updates while setting, eg clear start bit */ \
+ dp857x_write(sc, MAIN_STATUS, 0x40); \
+ dp857x_write(sc, REAL_TIME_MODE, \
+ dp857x_read(sc, REAL_TIME_MODE) & 0xF7); \
+ \
+ /* write all of the tod/alarm regs */ \
+ for (i = DP_FIRSTTODREG; i <= DP_LASTTODREG; i++) \
+ dp857x_write(sc, i, (*regs)[i]); \
+ \
+ /* reenable updates, eg set clock start bit */ \
+ dp857x_write(sc, REAL_TIME_MODE, \
+ dp857x_read(sc, REAL_TIME_MODE) | 0x08); \
+ } while (0);
+
+#endif /*_DP857X_H*/
+
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