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      1 /*	$NetBSD: mk48txxreg.h,v 1.11 2011/01/04 01:28:15 matt Exp $ */
      2 /*-
      3  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Paul Kranenburg.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 /*
     32  * Mostek MK48Txx clocks.
     33  *
     34  * The MK48T02 has 2KB of non-volatile memory. The time-of-day clock
     35  * registers start at offset 0x7f8.
     36  *
     37  * The MK48T08 and MK48T18 have 8KB of non-volatile memory
     38  *
     39  * The MK48T59 also has 8KB of non-volatile memory but in addition it
     40  * has a battery low detection bit and a power supply wakeup alarm for
     41  * power management.  It's at offset 0x1ff0 in the NVRAM.
     42  */
     43 
     44 /*
     45  * Mostek MK48TXX register definitions
     46  */
     47 
     48 /*
     49  * The first bank of eight registers at offset (nvramsz - 16) is
     50  * available only on more recent (which??) MK48Txx models.
     51  */
     52 #define MK48TXX_IFLAGS	0	/* flags */
     53 /*			1	   unused on MK48T59 */
     54 #define MK48TXX_IASEC	2	/* alarm seconds (0..59; BCD) */
     55 #define MK48TXX_IAMIN	3	/* alarm minutes (0..59; BCD) */
     56 #define MK48TXX_IAHOUR	4	/* alarm hour (0..23; BCD) */
     57 #define MK48TXX_IADAY	5	/* alarm day (1..31; BCD) */
     58 #define MK48TXX_IINTR	6	/* interrupts */
     59 #define MK48TXX_IWDOG	7	/* watchdog */
     60 #define MK48TXX_ICSR	8	/* control register / century (DS1553) */
     61 #define MK48TXX_ISEC	9	/* seconds (0..59; BCD) */
     62 #define MK48TXX_IMIN	10	/* minutes (0..59; BCD) */
     63 #define MK48TXX_IHOUR	11	/* hour (0..23; BCD) */
     64 #define MK48TXX_IWDAY	12	/* weekday (1..7) */
     65 #define MK48TXX_IDAY	13	/* day in month (1..31; BCD) */
     66 #define MK48TXX_IMON	14	/* month (1..12; BCD) */
     67 #define MK48TXX_IYEAR	15	/* year (0..99; BCD) */
     68 
     69 /* Bits in the flags register */
     70 #define MK48TXX_FLAGS_WDF	0x80	/* watchdog flag */
     71 #define MK48TXX_FLAGS_ALARM	0x40	/* alarm flag */
     72 #define MK48TXX_FLAGS_BATTLOW	0x10	/* battery low */
     73 
     74 /* Bits in the interrupt register */
     75 #define MK48TXX_INTR_AFE	0x80	/* alarm flag enable */
     76 #define MK48TXX_INTR_ABE	0x20	/* alarm in battery backup enable */
     77 
     78 /* Bits in the watchdog register */
     79 #define MK48TXX_WDOG_WDS	0x80	/* watchdog steering */
     80 #define MK48TXX_WDOG_BMB_MASK	0x7c	/* watchdog multiplier bits */
     81 #define MK48TXX_WDOG_BMB_SHIFT	2
     82 #define MK48TXX_WDOG_RES_MASK	0x03	/* watchdog resolution bits */
     83 #define MK48TXX_WDOG_RES_1_16S	0x00	/*   1/16 seconds */
     84 #define MK48TXX_WDOG_RES_1_4S	0x01	/*   1/4 seconds */
     85 #define MK48TXX_WDOG_RES_1S	0x02	/*   1 second */
     86 #define MK48TXX_WDOG_RES_4S	0x03	/*   4 seconds */
     87 
     88 /* Bits in the control register */
     89 #define MK48TXX_CSR_WRITE	0x80	/* want to write */
     90 #define MK48TXX_CSR_READ	0x40	/* want to read (freeze clock) */
     91 #define MK48TXX_CSR_CENT_MASK	0x3f	/* century mask */
     92 
     93 /* Bit in the weekday register */
     94 #define MK48TXX_WDAY_FT		0x40	/* freq test: toggle sec[0] at 512Hz */
     95 					/* next two are on MK48T59 only */
     96 #define MK48TXX_WDAY_CEB	0x20	/* century enable */
     97 #define MK48TXX_WDAY_CB		0x10	/* century bit */
     98 
     99 /* Bit in the seconds register */
    100 #define MK48TXX_SEC_STOP	0x80	/* stop the oscillator */
    101 
    102 #define MK48T02_CLKSZ		2048
    103 #define MK48T02_CLKOFF		0x7f0
    104 
    105 #define MK48T08_CLKSZ		8192
    106 #define MK48T08_CLKOFF		0x1ff0
    107 
    108 #define MK48T18_CLKSZ		8192
    109 #define MK48T18_CLKOFF		0x1ff0
    110 
    111 #define MK48T59_CLKSZ		8192
    112 #define MK48T59_CLKOFF		0x1ff0
    113 
    114 #define	DS1553_CLKSZ		8192
    115 #define	DS1553_CLKOFF		0x1ff0
    116