1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/* $Id: mostek.h,v 1.8 1996/11/04 00:45:30 ecd Exp $
* mostek.h: Describes the various Mostek time of day clock registers.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
*/
#ifndef _SPARC_MOSTEK_H
#define _SPARC_MOSTEK_H
#include <asm/idprom.h>
/* M48T02 Register Map (adapted from Sun NVRAM/Hostid FAQ)
*
* Data
* Address Function
* Bit 7 Bit 6 Bit 5 Bit 4Bit 3 Bit 2 Bit 1 Bit 0
* 7ff - - - - - - - - Year 00-99
* 7fe 0 0 0 - - - - - Month 01-12
* 7fd 0 0 - - - - - - Date 01-31
* 7fc 0 FT 0 0 0 - - - Day 01-07
* 7fb KS 0 - - - - - - Hours 00-23
* 7fa 0 - - - - - - - Minutes 00-59
* 7f9 ST - - - - - - - Seconds 00-59
* 7f8 W R S - - - - - Control
*
* * ST is STOP BIT
* * W is WRITE BIT
* * R is READ BIT
* * S is SIGN BIT
* * FT is FREQ TEST BIT
* * KS is KICK START BIT
*/
/* The Mostek 48t02 real time clock and NVRAM chip. The registers
* other than the control register are in binary coded decimal. Some
* control bits also live outside the control register.
*/
struct mostek48t02 {
volatile char eeprom[2008]; /* This is the eeprom, don't touch! */
struct idprom idprom; /* The idprom lives here. */
volatile unsigned char creg; /* Control register */
volatile unsigned char sec; /* Seconds (0-59) */
volatile unsigned char min; /* Minutes (0-59) */
volatile unsigned char hour; /* Hour (0-23) */
volatile unsigned char dow; /* Day of the week (1-7) */
volatile unsigned char dom; /* Day of the month (1-31) */
volatile unsigned char month; /* Month of year (1-12) */
volatile unsigned char year; /* Year (0-99) */
};
extern struct mostek48t02 *mstk48t02_regs;
/* Control register values. */
#define MSTK_CREG_WRITE 0x80 /* Must set this before placing values. */
#define MSTK_CREG_READ 0x40 /* Stop updates to allow a clean read. */
#define MSTK_CREG_SIGN 0x20 /* Slow/speed clock in calibration mode. */
/* Control bits that live in the other registers. */
#define MSTK_STOP 0x80 /* Stop the clock oscillator. (sec) */
#define MSTK_KICK_START 0x80 /* Kick start the clock chip. (hour) */
#define MSTK_FREQ_TEST 0x40 /* Frequency test mode. (day) */
#define MSTK_YEAR_ZERO 1968 /* If year reg has zero, it is 1968. */
#define MSTK_CVT_YEAR(yr) ((yr) + MSTK_YEAR_ZERO)
/* Masks that define how much space each value takes up. */
#define MSTK_SEC_MASK 0x7f
#define MSTK_MIN_MASK 0x7f
#define MSTK_HOUR_MASK 0x3f
#define MSTK_DOW_MASK 0x07
#define MSTK_DOM_MASK 0x3f
#define MSTK_MONTH_MASK 0x1f
#define MSTK_YEAR_MASK 0xff
/* Binary coded decimal conversion macros. */
#define MSTK_REGVAL_TO_DECIMAL(x) (((x) & 0x0F) + 0x0A * ((x) >> 0x04))
#define MSTK_DECIMAL_TO_REGVAL(x) ((((x) / 0x0A) << 0x04) + ((x) % 0x0A))
/* Generic register set and get macros for internal use. */
#define MSTK_GET(regs,var,mask) (MSTK_REGVAL_TO_DECIMAL(regs->var & MSTK_ ## mask ## _MASK))
#define MSTK_SET(regs,var,value,mask) do { regs->var &= ~(MSTK_ ## mask ## _MASK); regs->var |= MSTK_DECIMAL_TO_REGVAL(value) & (MSTK_ ## mask ## _MASK); } while (0)
/* Macros to make register access easier on our fingers. These give you
* the decimal value of the register requested if applicable. You pass
* the a pointer to a 'struct mostek48t02'.
*/
#define MSTK_REG_CREG(regs) (regs->creg)
#define MSTK_REG_SEC(regs) MSTK_GET(regs,sec,SEC)
#define MSTK_REG_MIN(regs) MSTK_GET(regs,min,MIN)
#define MSTK_REG_HOUR(regs) MSTK_GET(regs,hour,HOUR)
#define MSTK_REG_DOW(regs) MSTK_GET(regs,dow,DOW)
#define MSTK_REG_DOM(regs) MSTK_GET(regs,dom,DOM)
#define MSTK_REG_MONTH(regs) MSTK_GET(regs,month,MONTH)
#define MSTK_REG_YEAR(regs) MSTK_GET(regs,year,YEAR)
#define MSTK_SET_REG_SEC(regs,value) MSTK_SET(regs,sec,value,SEC)
#define MSTK_SET_REG_MIN(regs,value) MSTK_SET(regs,min,value,MIN)
#define MSTK_SET_REG_HOUR(regs,value) MSTK_SET(regs,hour,value,HOUR)
#define MSTK_SET_REG_DOW(regs,value) MSTK_SET(regs,dow,value,DOW)
#define MSTK_SET_REG_DOM(regs,value) MSTK_SET(regs,dom,value,DOM)
#define MSTK_SET_REG_MONTH(regs,value) MSTK_SET(regs,month,value,MONTH)
#define MSTK_SET_REG_YEAR(regs,value) MSTK_SET(regs,year,value,YEAR)
/* The Mostek 48t08 clock chip. Found on Sun4m's I think. It has the
* same (basically) layout of the 48t02 chip except for the extra
* NVRAM on board (8 KB against the 48t02's 2 KB).
*/
struct mostek48t08 {
char offset[6*1024]; /* Magic things may be here, who knows? */
struct mostek48t02 regs; /* Here is what we are interested in. */
};
extern struct mostek48t08 *mstk48t08_regs;
enum sparc_clock_type { MSTK48T02, MSTK48T08, MSTK_INVALID };
extern enum sparc_clock_type sp_clock_typ;
#endif /* !(_SPARC_MOSTEK_H) */
|
