Annotation of sys/dev/ic/mk48txxreg.h, Revision 1.1.1.1
1.1 nbrk 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 *);
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