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-rw-r--r--arch/sparc/include/asm/mostek_32.h171
1 files changed, 171 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/mostek_32.h b/arch/sparc/include/asm/mostek_32.h
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1/*
2 * mostek.h: Describes the various Mostek time of day clock registers.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
6 * Added intersil code 05/25/98 Chris Davis (cdavis@cois.on.ca)
7 */
8
9#ifndef _SPARC_MOSTEK_H
10#define _SPARC_MOSTEK_H
11
12#include <asm/idprom.h>
13#include <asm/io.h>
14
15/* M48T02 Register Map (adapted from Sun NVRAM/Hostid FAQ)
16 *
17 * Data
18 * Address Function
19 * Bit 7 Bit 6 Bit 5 Bit 4Bit 3 Bit 2 Bit 1 Bit 0
20 * 7ff - - - - - - - - Year 00-99
21 * 7fe 0 0 0 - - - - - Month 01-12
22 * 7fd 0 0 - - - - - - Date 01-31
23 * 7fc 0 FT 0 0 0 - - - Day 01-07
24 * 7fb KS 0 - - - - - - Hours 00-23
25 * 7fa 0 - - - - - - - Minutes 00-59
26 * 7f9 ST - - - - - - - Seconds 00-59
27 * 7f8 W R S - - - - - Control
28 *
29 * * ST is STOP BIT
30 * * W is WRITE BIT
31 * * R is READ BIT
32 * * S is SIGN BIT
33 * * FT is FREQ TEST BIT
34 * * KS is KICK START BIT
35 */
36
37/* The Mostek 48t02 real time clock and NVRAM chip. The registers
38 * other than the control register are in binary coded decimal. Some
39 * control bits also live outside the control register.
40 */
41#define mostek_read(_addr) readb(_addr)
42#define mostek_write(_addr,_val) writeb(_val, _addr)
43#define MOSTEK_EEPROM 0x0000UL
44#define MOSTEK_IDPROM 0x07d8UL
45#define MOSTEK_CREG 0x07f8UL
46#define MOSTEK_SEC 0x07f9UL
47#define MOSTEK_MIN 0x07faUL
48#define MOSTEK_HOUR 0x07fbUL
49#define MOSTEK_DOW 0x07fcUL
50#define MOSTEK_DOM 0x07fdUL
51#define MOSTEK_MONTH 0x07feUL
52#define MOSTEK_YEAR 0x07ffUL
53
54struct mostek48t02 {
55 volatile char eeprom[2008]; /* This is the eeprom, don't touch! */
56 struct idprom idprom; /* The idprom lives here. */
57 volatile unsigned char creg; /* Control register */
58 volatile unsigned char sec; /* Seconds (0-59) */
59 volatile unsigned char min; /* Minutes (0-59) */
60 volatile unsigned char hour; /* Hour (0-23) */
61 volatile unsigned char dow; /* Day of the week (1-7) */
62 volatile unsigned char dom; /* Day of the month (1-31) */
63 volatile unsigned char month; /* Month of year (1-12) */
64 volatile unsigned char year; /* Year (0-99) */
65};
66
67extern spinlock_t mostek_lock;
68extern void __iomem *mstk48t02_regs;
69
70/* Control register values. */
71#define MSTK_CREG_WRITE 0x80 /* Must set this before placing values. */
72#define MSTK_CREG_READ 0x40 /* Stop updates to allow a clean read. */
73#define MSTK_CREG_SIGN 0x20 /* Slow/speed clock in calibration mode. */
74
75/* Control bits that live in the other registers. */
76#define MSTK_STOP 0x80 /* Stop the clock oscillator. (sec) */
77#define MSTK_KICK_START 0x80 /* Kick start the clock chip. (hour) */
78#define MSTK_FREQ_TEST 0x40 /* Frequency test mode. (day) */
79
80#define MSTK_YEAR_ZERO 1968 /* If year reg has zero, it is 1968. */
81#define MSTK_CVT_YEAR(yr) ((yr) + MSTK_YEAR_ZERO)
82
83/* Masks that define how much space each value takes up. */
84#define MSTK_SEC_MASK 0x7f
85#define MSTK_MIN_MASK 0x7f
86#define MSTK_HOUR_MASK 0x3f
87#define MSTK_DOW_MASK 0x07
88#define MSTK_DOM_MASK 0x3f
89#define MSTK_MONTH_MASK 0x1f
90#define MSTK_YEAR_MASK 0xffU
91
92/* Binary coded decimal conversion macros. */
93#define MSTK_REGVAL_TO_DECIMAL(x) (((x) & 0x0F) + 0x0A * ((x) >> 0x04))
94#define MSTK_DECIMAL_TO_REGVAL(x) ((((x) / 0x0A) << 0x04) + ((x) % 0x0A))
95
96/* Generic register set and get macros for internal use. */
97#define MSTK_GET(regs,var,mask) (MSTK_REGVAL_TO_DECIMAL(((struct mostek48t02 *)regs)->var & MSTK_ ## mask ## _MASK))
98#define MSTK_SET(regs,var,value,mask) do { ((struct mostek48t02 *)regs)->var &= ~(MSTK_ ## mask ## _MASK); ((struct mostek48t02 *)regs)->var |= MSTK_DECIMAL_TO_REGVAL(value) & (MSTK_ ## mask ## _MASK); } while (0)
99
100/* Macros to make register access easier on our fingers. These give you
101 * the decimal value of the register requested if applicable. You pass
102 * the a pointer to a 'struct mostek48t02'.
103 */
104#define MSTK_REG_CREG(regs) (((struct mostek48t02 *)regs)->creg)
105#define MSTK_REG_SEC(regs) MSTK_GET(regs,sec,SEC)
106#define MSTK_REG_MIN(regs) MSTK_GET(regs,min,MIN)
107#define MSTK_REG_HOUR(regs) MSTK_GET(regs,hour,HOUR)
108#define MSTK_REG_DOW(regs) MSTK_GET(regs,dow,DOW)
109#define MSTK_REG_DOM(regs) MSTK_GET(regs,dom,DOM)
110#define MSTK_REG_MONTH(regs) MSTK_GET(regs,month,MONTH)
111#define MSTK_REG_YEAR(regs) MSTK_GET(regs,year,YEAR)
112
113#define MSTK_SET_REG_SEC(regs,value) MSTK_SET(regs,sec,value,SEC)
114#define MSTK_SET_REG_MIN(regs,value) MSTK_SET(regs,min,value,MIN)
115#define MSTK_SET_REG_HOUR(regs,value) MSTK_SET(regs,hour,value,HOUR)
116#define MSTK_SET_REG_DOW(regs,value) MSTK_SET(regs,dow,value,DOW)
117#define MSTK_SET_REG_DOM(regs,value) MSTK_SET(regs,dom,value,DOM)
118#define MSTK_SET_REG_MONTH(regs,value) MSTK_SET(regs,month,value,MONTH)
119#define MSTK_SET_REG_YEAR(regs,value) MSTK_SET(regs,year,value,YEAR)
120
121
122/* The Mostek 48t08 clock chip. Found on Sun4m's I think. It has the
123 * same (basically) layout of the 48t02 chip except for the extra
124 * NVRAM on board (8 KB against the 48t02's 2 KB).
125 */
126struct mostek48t08 {
127 char offset[6*1024]; /* Magic things may be here, who knows? */
128 struct mostek48t02 regs; /* Here is what we are interested in. */
129};
130
131#ifdef CONFIG_SUN4
132enum sparc_clock_type { MSTK48T02, MSTK48T08, \
133INTERSIL, MSTK_INVALID };
134#else
135enum sparc_clock_type { MSTK48T02, MSTK48T08, \
136MSTK_INVALID };
137#endif
138
139#ifdef CONFIG_SUN4
140/* intersil on a sun 4/260 code data from harris doc */
141struct intersil_dt {
142 volatile unsigned char int_csec;
143 volatile unsigned char int_hour;
144 volatile unsigned char int_min;
145 volatile unsigned char int_sec;
146 volatile unsigned char int_month;
147 volatile unsigned char int_day;
148 volatile unsigned char int_year;
149 volatile unsigned char int_dow;
150};
151
152struct intersil {
153 struct intersil_dt clk;
154 struct intersil_dt cmp;
155 volatile unsigned char int_intr_reg;
156 volatile unsigned char int_cmd_reg;
157};
158
159#define INTERSIL_STOP 0x0
160#define INTERSIL_START 0x8
161#define INTERSIL_INTR_DISABLE 0x0
162#define INTERSIL_INTR_ENABLE 0x10
163#define INTERSIL_32K 0x0
164#define INTERSIL_NORMAL 0x0
165#define INTERSIL_24H 0x4
166#define INTERSIL_INT_100HZ 0x2
167
168/* end of intersil info */
169#endif
170
171#endif /* !(_SPARC_MOSTEK_H) */
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