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