1 /* $NetBSD: mk48txxreg.h,v 1.6 2002/02/23 17:18:56 scw 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Mostek MK48Txx clocks. 40 * 41 * The MK48T02 has 2KB of non-volatile memory. The time-of-day clock 42 * registers start at offset 0x7f8. 43 * 44 * The MK48T08 and MK48T18 have 8KB of non-volatile memory 45 * 46 * The MK48T59 also has 8KB of non-volatile memory but in addition it 47 * has a battery low detection bit and a power supply wakeup alarm for 48 * power management. It's at offset 0x1ff0 in the NVRAM. 49 */ 50 51 /* 52 * Mostek MK48TXX register definitions 53 */ 54 55 /* 56 * The first bank of eight registers at offset (nvramsz - 16) is 57 * available only on recenter (which??) MK48Txx models. 58 */ 59 #define MK48TXX_X0 0 /* find out later */ 60 /* ... */ 61 #define MK48TXX_X7 7 /* find out later */ 62 #define MK48TXX_ICSR 8 /* control register */ 63 #define MK48TXX_ISEC 9 /* seconds (0..59; BCD) */ 64 #define MK48TXX_IMIN 10 /* minutes (0..59; BCD) */ 65 #define MK48TXX_IHOUR 11 /* hour (0..23; BCD) */ 66 #define MK48TXX_IWDAY 12 /* weekday (1..7) */ 67 #define MK48TXX_IDAY 13 /* day in month (1..31; BCD) */ 68 #define MK48TXX_IMON 14 /* month (1..12; BCD) */ 69 #define MK48TXX_IYEAR 15 /* year (0..99; BCD) */ 70 71 /* Bits in the control register */ 72 #define MK48TXX_CSR_WRITE 0x80 /* want to write */ 73 #define MK48TXX_CSR_READ 0x40 /* want to read (freeze clock) */ 74 75 #define MK48T02_CLKSZ 2048 76 #define MK48T02_CLKOFF 0x7f0 77 78 #define MK48T08_CLKSZ 8192 79 #define MK48T08_CLKOFF 0x1ff0 80 81 #define MK48T18_CLKSZ 8192 82 #define MK48T18_CLKOFF 0x1ff0 83 84 #define MK48T59_CLKSZ 8192 85 #define MK48T59_CLKOFF 0x1ff0 86 87 typedef u_int8_t (*mk48txx_nvrd_t)(bus_space_tag_t, bus_space_handle_t, int); 88 typedef void (*mk48txx_nvwr_t)(bus_space_tag_t, bus_space_handle_t, int, 89 u_int8_t); 90 91 /* Chip attach function */ 92 todr_chip_handle_t mk48txx_attach(bus_space_tag_t, bus_space_handle_t, 93 const char *, int, mk48txx_nvrd_t, mk48txx_nvwr_t); 94 95 /* Retrieve size of the on-chip NVRAM area */ 96 int mk48txx_get_nvram_size(todr_chip_handle_t, bus_size_t *); 97