Linux Kernel  3.7.1
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time.c
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1 /*
2  * linux/arch/m68k/sun3x/time.c
3  *
4  * Sun3x-specific time handling
5  */
6 
7 #include <linux/types.h>
8 #include <linux/kd.h>
9 #include <linux/init.h>
10 #include <linux/sched.h>
11 #include <linux/kernel_stat.h>
12 #include <linux/interrupt.h>
13 #include <linux/rtc.h>
14 #include <linux/bcd.h>
15 
16 #include <asm/irq.h>
17 #include <asm/io.h>
18 #include <asm/traps.h>
19 #include <asm/sun3x.h>
20 #include <asm/sun3ints.h>
21 #include <asm/rtc.h>
22 
23 #include "time.h"
24 
25 #define M_CONTROL 0xf8
26 #define M_SEC 0xf9
27 #define M_MIN 0xfa
28 #define M_HOUR 0xfb
29 #define M_DAY 0xfc
30 #define M_DATE 0xfd
31 #define M_MONTH 0xfe
32 #define M_YEAR 0xff
33 
34 #define C_WRITE 0x80
35 #define C_READ 0x40
36 #define C_SIGN 0x20
37 #define C_CALIB 0x1f
38 
39 int sun3x_hwclk(int set, struct rtc_time *t)
40 {
41  volatile struct mostek_dt *h =
42  (struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL);
43  unsigned long flags;
44 
45  local_irq_save(flags);
46 
47  if(set) {
48  h->csr |= C_WRITE;
49  h->sec = bin2bcd(t->tm_sec);
50  h->min = bin2bcd(t->tm_min);
51  h->hour = bin2bcd(t->tm_hour);
52  h->wday = bin2bcd(t->tm_wday);
53  h->mday = bin2bcd(t->tm_mday);
54  h->month = bin2bcd(t->tm_mon);
55  h->year = bin2bcd(t->tm_year);
56  h->csr &= ~C_WRITE;
57  } else {
58  h->csr |= C_READ;
59  t->tm_sec = bcd2bin(h->sec);
60  t->tm_min = bcd2bin(h->min);
61  t->tm_hour = bcd2bin(h->hour);
62  t->tm_wday = bcd2bin(h->wday);
63  t->tm_mday = bcd2bin(h->mday);
64  t->tm_mon = bcd2bin(h->month);
65  t->tm_year = bcd2bin(h->year);
66  h->csr &= ~C_READ;
67  }
68 
69  local_irq_restore(flags);
70 
71  return 0;
72 }
73 /* Not much we can do here */
74 unsigned long sun3x_gettimeoffset (void)
75 {
76  return 0L;
77 }
78 
79 #if 0
80 static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs)
81 {
82  void (*vector)(int, void *, struct pt_regs *) = dev_id;
83 
84  /* Clear the pending interrupt - pulse the enable line low */
85  disable_irq(5);
86  enable_irq(5);
87 
88  vector(irq, NULL, regs);
89 }
90 #endif
91 
93 {
94 
96 
97 
98  /* Pulse enable low to get the clock started */
100  sun3_enable_irq(5);
102 }