1 /* $NetBSD: intersil7170reg.h,v 1.2 2008/04/28 20:23:50 martin Exp $ */
2
3 /*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Adam Glass.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _INTERSIL7170REG_H_
33 #define _INTERSIL7170REG_H_
34
35 /*
36 * Driver support for the intersil7170 used in sun[34]s to provide
37 * real time clock and time-of-day support.
38 *
39 * Derived from: datasheet "ICM7170 a uP-Compatible Real-Time Clock"
40 * document #301680-005, Dec 85
41 *
42 * Note that this device provides both time-of-day and interval timer
43 * functionality. Both functions use the same control registers. On top
44 * of that, the command control register is write-only. Currently, this
45 * driver assumes that the interval timer is to be enabled, and hence
46 * always sets/restores the INTERSIL_CMD_IENABLE control bit when
47 * manipulating the TOD.
48 */
49
50 struct intersil_dt { /* from p. 7 of 10 */
51 uint8_t dt_csec;
52 uint8_t dt_hour;
53 uint8_t dt_min;
54 uint8_t dt_sec;
55 uint8_t dt_month;
56 uint8_t dt_day;
57 uint8_t dt_year;
58 uint8_t dt_dow;
59 };
60
61 struct intersil7170 {
62 struct intersil_dt counters;
63 struct intersil_dt clk_ram; /* should be ok as both are word aligned */
64 uint8_t clk_intr_reg;
65 uint8_t clk_cmd_reg;
66 };
67
68 /* Indices to time-of-day clock registers */
69 #define INTERSIL_ICSEC 0
70 #define INTERSIL_IHOUR 1
71 #define INTERSIL_IMIN 2
72 #define INTERSIL_ISEC 3
73 #define INTERSIL_IMON 4
74 #define INTERSIL_IDAY 5
75 #define INTERSIL_IYEAR 6
76 #define INTERSIL_IDOW 7
77
78 #define INTERSIL_IINTR 16
79 #define INTERSIL_ICMD 17
80
81 /* bit assignments for command register, p. 6 of 10, write-only */
82 #define INTERSIL_CMD_FREQ_32K 0x0
83 #define INTERSIL_CMD_FREQ_1M 0x1
84 #define INTERSIL_CMD_FREQ_2M 0x2
85 #define INTERSIL_CMD_FREQ_4M 0x3
86
87 #define INTERSIL_CMD_12HR_MODE 0x0
88 #define INTERSIL_CMD_24HR_MODE 0x4
89
90 #define INTERSIL_CMD_STOP 0x0
91 #define INTERSIL_CMD_RUN 0x8
92
93 #define INTERSIL_CMD_IDISABLE 0x0
94 #define INTERSIL_CMD_IENABLE 0x10
95
96 #define INTERSIL_CMD_TEST_MODE 0x20
97 #define INTERSIL_CMD_NORMAL_MODE 0x0
98
99 #define INTERSIL_COMMAND(run, interrupt) \
100 ((run) | (interrupt) | INTERSIL_CMD_FREQ_32K | \
101 INTERSIL_CMD_24HR_MODE | INTERSIL_CMD_NORMAL_MODE)
102
103 /* bit assignments for interrupt register r/w, p 7 of 10 */
104
105 #define INTERSIL_INTER_ALARM 0x1 /* r/w */
106 #define INTERSIL_INTER_CSECONDS 0x2 /* r/w */
107 #define INTERSIL_INTER_DSECONDS 0x4 /* r/w */
108 #define INTERSIL_INTER_SECONDS 0x8 /* r/w */
109 #define INTERSIL_INTER_MINUTES 0x10 /* r/w */
110 #define INTERSIL_INTER_HOURS 0x20 /* r/w */
111 #define INTERSIL_INTER_DAYS 0x40 /* r/w */
112 #define INTERSIL_INTER_PENDING 0x80 /* read-only */
113
114 #define INTERSIL_INTER_BITS \
115 "\2\10PENDING\7DAYS\6HRS\5MIN\4SCDS\3DSEC\2CSEC\1ALARM"
116
117 #endif /* _INTERSIL7170REG_H_ */
Cache object: c91be600a15e2ff1a98a253e0fc98bf9
|