Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/m68k/sun3x/time.c | |
4 | * | |
5 | * Sun3x-specific time handling | |
6 | */ | |
7 | ||
8 | #include <linux/types.h> | |
9 | #include <linux/kd.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/sched.h> | |
12 | #include <linux/kernel_stat.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/rtc.h> | |
15 | #include <linux/bcd.h> | |
16 | ||
17 | #include <asm/irq.h> | |
18 | #include <asm/io.h> | |
084b3600 | 19 | #include <asm/machdep.h> |
1da177e4 LT |
20 | #include <asm/traps.h> |
21 | #include <asm/sun3x.h> | |
22 | #include <asm/sun3ints.h> | |
1da177e4 LT |
23 | |
24 | #include "time.h" | |
25 | ||
26 | #define M_CONTROL 0xf8 | |
27 | #define M_SEC 0xf9 | |
28 | #define M_MIN 0xfa | |
29 | #define M_HOUR 0xfb | |
30 | #define M_DAY 0xfc | |
31 | #define M_DATE 0xfd | |
32 | #define M_MONTH 0xfe | |
33 | #define M_YEAR 0xff | |
34 | ||
35 | #define C_WRITE 0x80 | |
36 | #define C_READ 0x40 | |
37 | #define C_SIGN 0x20 | |
38 | #define C_CALIB 0x1f | |
39 | ||
40 | int sun3x_hwclk(int set, struct rtc_time *t) | |
41 | { | |
42 | volatile struct mostek_dt *h = | |
43 | (struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL); | |
44 | unsigned long flags; | |
45 | ||
46 | local_irq_save(flags); | |
47 | ||
48 | if(set) { | |
49 | h->csr |= C_WRITE; | |
5b1d5f95 AB |
50 | h->sec = bin2bcd(t->tm_sec); |
51 | h->min = bin2bcd(t->tm_min); | |
52 | h->hour = bin2bcd(t->tm_hour); | |
53 | h->wday = bin2bcd(t->tm_wday); | |
54 | h->mday = bin2bcd(t->tm_mday); | |
55 | h->month = bin2bcd(t->tm_mon); | |
56 | h->year = bin2bcd(t->tm_year); | |
1da177e4 LT |
57 | h->csr &= ~C_WRITE; |
58 | } else { | |
59 | h->csr |= C_READ; | |
5b1d5f95 AB |
60 | t->tm_sec = bcd2bin(h->sec); |
61 | t->tm_min = bcd2bin(h->min); | |
62 | t->tm_hour = bcd2bin(h->hour); | |
63 | t->tm_wday = bcd2bin(h->wday); | |
64 | t->tm_mday = bcd2bin(h->mday); | |
65 | t->tm_mon = bcd2bin(h->month); | |
66 | t->tm_year = bcd2bin(h->year); | |
1da177e4 LT |
67 | h->csr &= ~C_READ; |
68 | } | |
69 | ||
70 | local_irq_restore(flags); | |
71 | ||
72 | return 0; | |
73 | } | |
74 | /* Not much we can do here */ | |
c8d5ba18 | 75 | u32 sun3x_gettimeoffset(void) |
1da177e4 LT |
76 | { |
77 | return 0L; | |
78 | } | |
79 | ||
80 | #if 0 | |
81 | static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs) | |
82 | { | |
83 | void (*vector)(int, void *, struct pt_regs *) = dev_id; | |
84 | ||
85 | /* Clear the pending interrupt - pulse the enable line low */ | |
86 | disable_irq(5); | |
87 | enable_irq(5); | |
88 | ||
89 | vector(irq, NULL, regs); | |
90 | } | |
91 | #endif | |
92 | ||
40220c1a | 93 | void __init sun3x_sched_init(irq_handler_t vector) |
1da177e4 LT |
94 | { |
95 | ||
96 | sun3_disable_interrupts(); | |
97 | ||
98 | ||
99 | /* Pulse enable low to get the clock started */ | |
100 | sun3_disable_irq(5); | |
101 | sun3_enable_irq(5); | |
102 | sun3_enable_interrupts(); | |
103 | } |