FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/mk48txxreg.h

     /*      $OpenBSD: mk48txxreg.h,v 1.5 2009/05/15 23:02:25 miod 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
    
    #define MK48T35_CLKSZ           0x8000
    #define MK48T35_CLKOFF          0x7ff0
    
    /* 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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