aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc64/kernel/pmac_time.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc64/kernel/pmac_time.c')
-rw-r--r--arch/ppc64/kernel/pmac_time.c174
1 files changed, 0 insertions, 174 deletions
diff --git a/arch/ppc64/kernel/pmac_time.c b/arch/ppc64/kernel/pmac_time.c
deleted file mode 100644
index 928bf213ec4e..000000000000
--- a/arch/ppc64/kernel/pmac_time.c
+++ /dev/null
@@ -1,174 +0,0 @@
1/*
2 * Support for periodic interrupts (100 per second) and for getting
3 * the current time from the RTC on Power Macintoshes.
4 *
5 * We use the decrementer register for our periodic interrupts.
6 *
7 * Paul Mackerras August 1996.
8 * Copyright (C) 1996 Paul Mackerras.
9 * Copyright (C) 2003-2005 Benjamin Herrenschmidt.
10 *
11 */
12#include <linux/config.h>
13#include <linux/errno.h>
14#include <linux/sched.h>
15#include <linux/kernel.h>
16#include <linux/param.h>
17#include <linux/string.h>
18#include <linux/mm.h>
19#include <linux/init.h>
20#include <linux/time.h>
21#include <linux/adb.h>
22#include <linux/pmu.h>
23#include <linux/interrupt.h>
24#include <linux/rtc.h>
25
26#include <asm/sections.h>
27#include <asm/prom.h>
28#include <asm/system.h>
29#include <asm/io.h>
30#include <asm/pgtable.h>
31#include <asm/machdep.h>
32#include <asm/time.h>
33#include <asm/nvram.h>
34#include <asm/smu.h>
35
36#undef DEBUG
37
38#ifdef DEBUG
39#define DBG(x...) printk(x)
40#else
41#define DBG(x...)
42#endif
43
44/* Apparently the RTC stores seconds since 1 Jan 1904 */
45#define RTC_OFFSET 2082844800
46
47/*
48 * Calibrate the decrementer frequency with the VIA timer 1.
49 */
50#define VIA_TIMER_FREQ_6 4700000 /* time 1 frequency * 6 */
51
52extern struct timezone sys_tz;
53extern void to_tm(int tim, struct rtc_time * tm);
54
55void pmac_get_rtc_time(struct rtc_time *tm)
56{
57 switch(sys_ctrler) {
58#ifdef CONFIG_ADB_PMU
59 case SYS_CTRLER_PMU: {
60 /* TODO: Move that to a function in the PMU driver */
61 struct adb_request req;
62 unsigned int now;
63
64 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
65 return;
66 pmu_wait_complete(&req);
67 if (req.reply_len != 4)
68 printk(KERN_ERR "pmac_get_rtc_time: PMU returned a %d"
69 " bytes reply\n", req.reply_len);
70 now = (req.reply[0] << 24) + (req.reply[1] << 16)
71 + (req.reply[2] << 8) + req.reply[3];
72 DBG("get: %u -> %u\n", (int)now, (int)(now - RTC_OFFSET));
73 now -= RTC_OFFSET;
74
75 to_tm(now, tm);
76 tm->tm_year -= 1900;
77 tm->tm_mon -= 1;
78
79 DBG("-> tm_mday: %d, tm_mon: %d, tm_year: %d, %d:%02d:%02d\n",
80 tm->tm_mday, tm->tm_mon, tm->tm_year,
81 tm->tm_hour, tm->tm_min, tm->tm_sec);
82 break;
83 }
84#endif /* CONFIG_ADB_PMU */
85
86#ifdef CONFIG_PMAC_SMU
87 case SYS_CTRLER_SMU:
88 smu_get_rtc_time(tm, 1);
89 break;
90#endif /* CONFIG_PMAC_SMU */
91 default:
92 ;
93 }
94}
95
96int pmac_set_rtc_time(struct rtc_time *tm)
97{
98 switch(sys_ctrler) {
99#ifdef CONFIG_ADB_PMU
100 case SYS_CTRLER_PMU: {
101 /* TODO: Move that to a function in the PMU driver */
102 struct adb_request req;
103 unsigned int nowtime;
104
105 DBG("set: tm_mday: %d, tm_mon: %d, tm_year: %d,"
106 " %d:%02d:%02d\n",
107 tm->tm_mday, tm->tm_mon, tm->tm_year,
108 tm->tm_hour, tm->tm_min, tm->tm_sec);
109
110 nowtime = mktime(tm->tm_year + 1900, tm->tm_mon + 1,
111 tm->tm_mday, tm->tm_hour, tm->tm_min,
112 tm->tm_sec);
113
114 DBG("-> %u -> %u\n", (int)nowtime,
115 (int)(nowtime + RTC_OFFSET));
116 nowtime += RTC_OFFSET;
117
118 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
119 nowtime >> 24, nowtime >> 16,
120 nowtime >> 8, nowtime) < 0)
121 return -ENXIO;
122 pmu_wait_complete(&req);
123 if (req.reply_len != 0)
124 printk(KERN_ERR "pmac_set_rtc_time: PMU returned a %d"
125 " bytes reply\n", req.reply_len);
126 return 0;
127 }
128#endif /* CONFIG_ADB_PMU */
129
130#ifdef CONFIG_PMAC_SMU
131 case SYS_CTRLER_SMU:
132 return smu_set_rtc_time(tm, 1);
133#endif /* CONFIG_PMAC_SMU */
134 default:
135 return -ENODEV;
136 }
137}
138
139unsigned long __init pmac_get_boot_time(void)
140{
141 struct rtc_time tm;
142
143 pmac_get_rtc_time(&tm);
144 return mktime(tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday,
145 tm.tm_hour, tm.tm_min, tm.tm_sec);
146}
147
148/*
149 * Query the OF and get the decr frequency.
150 * FIXME: merge this with generic_calibrate_decr
151 */
152void __init pmac_calibrate_decr(void)
153{
154 struct device_node *cpu;
155 unsigned int *fp;
156
157 /*
158 * The cpu node should have a timebase-frequency property
159 * to tell us the rate at which the decrementer counts.
160 */
161 cpu = find_type_devices("cpu");
162 if (cpu == 0)
163 panic("can't find cpu node in time_init");
164 fp = (unsigned int *) get_property(cpu, "timebase-frequency", NULL);
165 if (fp == 0)
166 panic("can't get cpu timebase frequency");
167 ppc_tb_freq = *fp;
168
169 fp = (unsigned int *)get_property(cpu, "clock-frequency", NULL);
170 if (fp == 0)
171 panic("can't get cpu processor frequency");
172 ppc_proc_freq = *fp;
173}
174
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 08:32:46 -0500