/* $NetBSD: mk48txxreg.h,v 1.11 2011/01/04 01:28:15 matt Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 NETBSD FOUNDATION, INC. 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 THE FOUNDATION 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.
*/
/*
* Mostek MK48Txx clocks.
*
* The MK48T02 has 2KB of non-volatile memory. The time-of-day clock
* registers start at offset 0x7f8.
*
* The MK48T08 and MK48T18 have 8KB of non-volatile memory
*
* The MK48T59 also has 8KB of non-volatile memory but in addition it
* has a battery low detection bit and a power supply wakeup alarm for
* power management. It's at offset 0x1ff0 in the NVRAM.
*/
/*
* Mostek MK48TXX register definitions
*/
/*
* The first bank of eight registers at offset (nvramsz - 16) is
* available only on more recent (which??) MK48Txx models.
*/
#define MK48TXX_IFLAGS 0 /* flags */
/* 1 unused on MK48T59 */
#define MK48TXX_IASEC 2 /* alarm seconds (0..59; BCD) */
#define MK48TXX_IAMIN 3 /* alarm minutes (0..59; BCD) */
#define MK48TXX_IAHOUR 4 /* alarm hour (0..23; BCD) */
#define MK48TXX_IADAY 5 /* alarm day (1..31; BCD) */
#define MK48TXX_IINTR 6 /* interrupts */
#define MK48TXX_IWDOG 7 /* watchdog */
#define MK48TXX_ICSR 8 /* control register / century (DS1553) */
#define MK48TXX_ISEC 9 /* seconds (0..59; BCD) */
#define MK48TXX_IMIN 10 /* minutes (0..59; BCD) */
#define MK48TXX_IHOUR 11 /* hour (0..23; BCD) */
#define MK48TXX_IWDAY 12 /* weekday (1..7) */
#define MK48TXX_IDAY 13 /* day in month (1..31; BCD) */
#define MK48TXX_IMON 14 /* month (1..12; BCD) */
#define MK48TXX_IYEAR 15 /* year (0..99; BCD) */
/* Bits in the flags register */
#define MK48TXX_FLAGS_WDF 0x80 /* watchdog flag */
#define MK48TXX_FLAGS_ALARM 0x40 /* alarm flag */
#define MK48TXX_FLAGS_BATTLOW 0x10 /* battery low */
/* Bits in the interrupt register */
#define MK48TXX_INTR_AFE 0x80 /* alarm flag enable */
#define MK48TXX_INTR_ABE 0x20 /* alarm in battery backup enable */
/* Bits in the control register */
#define MK48TXX_CSR_WRITE 0x80 /* want to write */
#define MK48TXX_CSR_READ 0x40 /* want to read (freeze clock) */
#define MK48TXX_CSR_CENT_MASK 0x3f /* century mask */
/* Bit in the weekday register */
#define MK48TXX_WDAY_FT 0x40 /* freq test: toggle sec[0] at 512Hz */
/* next two are on MK48T59 only */
#define MK48TXX_WDAY_CEB 0x20 /* century enable */
#define MK48TXX_WDAY_CB 0x10 /* century bit */
/* Bit in the seconds register */
#define MK48TXX_SEC_STOP 0x80 /* stop the oscillator */
