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1 | /* $Id: mostek.h,v 1.4 2001/01/11 15:07:09 davem Exp $ |
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 | */ | |
7 | ||
8 | #ifndef _SPARC64_MOSTEK_H | |
9 | #define _SPARC64_MOSTEK_H | |
10 | ||
11 | #include <asm/idprom.h> | |
12 | ||
13 | /* M48T02 Register Map (adapted from Sun NVRAM/Hostid FAQ) | |
14 | * | |
15 | * Data | |
16 | * Address Function | |
17 | * Bit 7 Bit 6 Bit 5 Bit 4Bit 3 Bit 2 Bit 1 Bit 0 | |
18 | * 7ff - - - - - - - - Year 00-99 | |
19 | * 7fe 0 0 0 - - - - - Month 01-12 | |
20 | * 7fd 0 0 - - - - - - Date 01-31 | |
21 | * 7fc 0 FT 0 0 0 - - - Day 01-07 | |
22 | * 7fb KS 0 - - - - - - Hours 00-23 | |
23 | * 7fa 0 - - - - - - - Minutes 00-59 | |
24 | * 7f9 ST - - - - - - - Seconds 00-59 | |
25 | * 7f8 W R S - - - - - Control | |
26 | * | |
27 | * * ST is STOP BIT | |
28 | * * W is WRITE BIT | |
29 | * * R is READ BIT | |
30 | * * S is SIGN BIT | |
31 | * * FT is FREQ TEST BIT | |
32 | * * KS is KICK START BIT | |
33 | */ | |
34 | ||
35 | /* The Mostek 48t02 real time clock and NVRAM chip. The registers | |
36 | * other than the control register are in binary coded decimal. Some | |
37 | * control bits also live outside the control register. | |
38 | * | |
39 | * We now deal with physical addresses for I/O to the chip. -DaveM | |
40 | */ | |
ef0299bf | 41 | static __inline__ u8 mostek_read(void __iomem *addr) |
1da177e4 LT |
42 | { |
43 | u8 ret; | |
44 | ||
45 | __asm__ __volatile__("lduba [%1] %2, %0" | |
46 | : "=r" (ret) | |
47 | : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)); | |
48 | return ret; | |
49 | } | |
50 | ||
ef0299bf | 51 | static __inline__ void mostek_write(void __iomem *addr, u8 val) |
1da177e4 LT |
52 | { |
53 | __asm__ __volatile__("stba %0, [%1] %2" | |
54 | : /* no outputs */ | |
55 | : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)); | |
56 | } | |
57 | ||
58 | #define MOSTEK_EEPROM 0x0000UL | |
59 | #define MOSTEK_IDPROM 0x07d8UL | |
60 | #define MOSTEK_CREG 0x07f8UL | |
61 | #define MOSTEK_SEC 0x07f9UL | |
62 | #define MOSTEK_MIN 0x07faUL | |
63 | #define MOSTEK_HOUR 0x07fbUL | |
64 | #define MOSTEK_DOW 0x07fcUL | |
65 | #define MOSTEK_DOM 0x07fdUL | |
66 | #define MOSTEK_MONTH 0x07feUL | |
67 | #define MOSTEK_YEAR 0x07ffUL | |
68 | ||
69 | extern spinlock_t mostek_lock; | |
ef0299bf | 70 | extern void __iomem *mstk48t02_regs; |
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71 | |
72 | /* Control register values. */ | |
73 | #define MSTK_CREG_WRITE 0x80 /* Must set this before placing values. */ | |
74 | #define MSTK_CREG_READ 0x40 /* Stop updates to allow a clean read. */ | |
75 | #define MSTK_CREG_SIGN 0x20 /* Slow/speed clock in calibration mode. */ | |
76 | ||
77 | /* Control bits that live in the other registers. */ | |
78 | #define MSTK_STOP 0x80 /* Stop the clock oscillator. (sec) */ | |
79 | #define MSTK_KICK_START 0x80 /* Kick start the clock chip. (hour) */ | |
80 | #define MSTK_FREQ_TEST 0x40 /* Frequency test mode. (day) */ | |
81 | ||
82 | #define MSTK_YEAR_ZERO 1968 /* If year reg has zero, it is 1968. */ | |
83 | #define MSTK_CVT_YEAR(yr) ((yr) + MSTK_YEAR_ZERO) | |
84 | ||
85 | /* Masks that define how much space each value takes up. */ | |
86 | #define MSTK_SEC_MASK 0x7f | |
87 | #define MSTK_MIN_MASK 0x7f | |
88 | #define MSTK_HOUR_MASK 0x3f | |
89 | #define MSTK_DOW_MASK 0x07 | |
90 | #define MSTK_DOM_MASK 0x3f | |
91 | #define MSTK_MONTH_MASK 0x1f | |
7945d562 | 92 | #define MSTK_YEAR_MASK 0xffU |
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93 | |
94 | /* Binary coded decimal conversion macros. */ | |
95 | #define MSTK_REGVAL_TO_DECIMAL(x) (((x) & 0x0F) + 0x0A * ((x) >> 0x04)) | |
96 | #define MSTK_DECIMAL_TO_REGVAL(x) ((((x) / 0x0A) << 0x04) + ((x) % 0x0A)) | |
97 | ||
98 | /* Generic register set and get macros for internal use. */ | |
99 | #define MSTK_GET(regs,name) \ | |
100 | (MSTK_REGVAL_TO_DECIMAL(mostek_read(regs + MOSTEK_ ## name) & MSTK_ ## name ## _MASK)) | |
101 | #define MSTK_SET(regs,name,value) \ | |
102 | do { u8 __val = mostek_read(regs + MOSTEK_ ## name); \ | |
103 | __val &= ~(MSTK_ ## name ## _MASK); \ | |
104 | __val |= (MSTK_DECIMAL_TO_REGVAL(value) & \ | |
105 | (MSTK_ ## name ## _MASK)); \ | |
106 | mostek_write(regs + MOSTEK_ ## name, __val); \ | |
107 | } while(0) | |
108 | ||
109 | /* Macros to make register access easier on our fingers. These give you | |
110 | * the decimal value of the register requested if applicable. You pass | |
111 | * the a pointer to a 'struct mostek48t02'. | |
112 | */ | |
113 | #define MSTK_REG_CREG(regs) (mostek_read((regs) + MOSTEK_CREG)) | |
114 | #define MSTK_REG_SEC(regs) MSTK_GET(regs,SEC) | |
115 | #define MSTK_REG_MIN(regs) MSTK_GET(regs,MIN) | |
116 | #define MSTK_REG_HOUR(regs) MSTK_GET(regs,HOUR) | |
117 | #define MSTK_REG_DOW(regs) MSTK_GET(regs,DOW) | |
118 | #define MSTK_REG_DOM(regs) MSTK_GET(regs,DOM) | |
119 | #define MSTK_REG_MONTH(regs) MSTK_GET(regs,MONTH) | |
120 | #define MSTK_REG_YEAR(regs) MSTK_GET(regs,YEAR) | |
121 | ||
122 | #define MSTK_SET_REG_SEC(regs,value) MSTK_SET(regs,SEC,value) | |
123 | #define MSTK_SET_REG_MIN(regs,value) MSTK_SET(regs,MIN,value) | |
124 | #define MSTK_SET_REG_HOUR(regs,value) MSTK_SET(regs,HOUR,value) | |
125 | #define MSTK_SET_REG_DOW(regs,value) MSTK_SET(regs,DOW,value) | |
126 | #define MSTK_SET_REG_DOM(regs,value) MSTK_SET(regs,DOM,value) | |
127 | #define MSTK_SET_REG_MONTH(regs,value) MSTK_SET(regs,MONTH,value) | |
128 | #define MSTK_SET_REG_YEAR(regs,value) MSTK_SET(regs,YEAR,value) | |
129 | ||
130 | ||
131 | /* The Mostek 48t08 clock chip. Found on Sun4m's I think. It has the | |
132 | * same (basically) layout of the 48t02 chip except for the extra | |
133 | * NVRAM on board (8 KB against the 48t02's 2 KB). | |
134 | */ | |
135 | #define MOSTEK_48T08_OFFSET 0x0000UL /* Lower NVRAM portions */ | |
136 | #define MOSTEK_48T08_48T02 0x1800UL /* Offset to 48T02 chip */ | |
137 | ||
138 | /* SUN5 systems usually have 48t59 model clock chipsets. But we keep the older | |
139 | * clock chip definitions around just in case. | |
140 | */ | |
141 | #define MOSTEK_48T59_OFFSET 0x0000UL /* Lower NVRAM portions */ | |
142 | #define MOSTEK_48T59_48T02 0x1800UL /* Offset to 48T02 chip */ | |
143 | ||
144 | #endif /* !(_SPARC64_MOSTEK_H) */ |