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/* $OpenBSD: mk48txxreg.h,v 1.4 2008/06/26 05:42:15 ray Exp $ */
/* $NetBSD: mk48txxreg.h,v 1.4 2000/11/11 11:59:42 pk 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 recenter (which??) MK48Txx models.
*/
#define MK48TXX_X0 0 /* find out later */
/* ... */
#define MK48TXX_X7 7 /* find out later */
#define MK48TXX_ICSR 8 /* control register */
#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 control register */
#define MK48TXX_CSR_WRITE 0x80 /* want to write */
#define MK48TXX_CSR_READ 0x40 /* want to read (freeze clock) */
#define MK48T02_CLKSZ 2048
#define MK48T02_CLKOFF 0x7f0
#define MK48T08_CLKSZ 8192
#define MK48T08_CLKOFF 0x1ff0
#define MK48T18_CLKSZ 8192
#define MK48T18_CLKOFF 0x1ff0
#define MK48T59_CLKSZ 8192
#define MK48T59_CLKOFF 0x1ff0
/* Chip attach function */
todr_chip_handle_t mk48txx_attach(bus_space_tag_t, bus_space_handle_t,
const char *, int);
/* Retrieve size of the on-chip NVRAM area */
int mk48txx_get_nvram_size(todr_chip_handle_t, bus_size_t *);
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