1 /* $OpenBSD: mk48txxreg.h,v 1.3 2002/03/19 01:48:47 jason Exp $ */
2 /* $NetBSD: mk48txxreg.h,v 1.4 2000/11/11 11:59:42 pk Exp $ */
3 /*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 /*
40 * Mostek MK48Txx clocks.
41 *
42 * The MK48T02 has 2KB of non-volatile memory. The time-of-day clock
43 * registers start at offset 0x7f8.
44 *
45 * The MK48T08 and MK48T18 have 8KB of non-volatile memory
46 *
47 * The MK48T59 also has 8KB of non-volatile memory but in addition it
48 * has a battery low detection bit and a power supply wakeup alarm for
49 * power management. It's at offset 0x1ff0 in the NVRAM.
50 */
51
52 /*
53 * Mostek MK48TXX register definitions
54 */
55
56 /*
57 * The first bank of eight registers at offset (nvramsz - 16) is
58 * available only on recenter (which??) MK48Txx models.
59 */
60 #define MK48TXX_X0 0 /* find out later */
61 /* ... */
62 #define MK48TXX_X7 7 /* find out later */
63 #define MK48TXX_ICSR 8 /* control register */
64 #define MK48TXX_ISEC 9 /* seconds (0..59; BCD) */
65 #define MK48TXX_IMIN 10 /* minutes (0..59; BCD) */
66 #define MK48TXX_IHOUR 11 /* hour (0..23; BCD) */
67 #define MK48TXX_IWDAY 12 /* weekday (1..7) */
68 #define MK48TXX_IDAY 13 /* day in month (1..31; BCD) */
69 #define MK48TXX_IMON 14 /* month (1..12; BCD) */
70 #define MK48TXX_IYEAR 15 /* year (0..99; BCD) */
71
72 /* Bits in the control register */
73 #define MK48TXX_CSR_WRITE 0x80 /* want to write */
74 #define MK48TXX_CSR_READ 0x40 /* want to read (freeze clock) */
75
76 #define MK48T02_CLKSZ 2048
77 #define MK48T02_CLKOFF 0x7f0
78
79 #define MK48T08_CLKSZ 8192
80 #define MK48T08_CLKOFF 0x1ff0
81
82 #define MK48T18_CLKSZ 8192
83 #define MK48T18_CLKOFF 0x1ff0
84
85 #define MK48T59_CLKSZ 8192
86 #define MK48T59_CLKOFF 0x1ff0
87
88 /* Chip attach function */
89 todr_chip_handle_t mk48txx_attach(bus_space_tag_t, bus_space_handle_t,
90 const char *, int);
91
92 /* Retrieve size of the on-chip NVRAM area */
93 int mk48txx_get_nvram_size(todr_chip_handle_t, bus_size_t *);