1/*
2 *  PS3 time and rtc routines.
3 *
4 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
5 *  Copyright 2006 Sony Corp.
6 *
7 *  This program is free software; you can redistribute it and/or modify
8 *  it under the terms of the GNU General Public License as published by
9 *  the Free Software Foundation; version 2 of the License.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19 */
20
21#include <linux/kernel.h>
22
23#include <asm/rtc.h>
24#include <asm/lv1call.h>
25#include <asm/ps3.h>
26
27#include "platform.h"
28
29#define dump_tm(_a) _dump_tm(_a, __func__, __LINE__)
30static void _dump_tm(const struct rtc_time *tm, const char* func, int line)
31{
32	pr_debug("%s:%d tm_sec  %d\n", func, line, tm->tm_sec);
33	pr_debug("%s:%d tm_min  %d\n", func, line, tm->tm_min);
34	pr_debug("%s:%d tm_hour %d\n", func, line, tm->tm_hour);
35	pr_debug("%s:%d tm_mday %d\n", func, line, tm->tm_mday);
36	pr_debug("%s:%d tm_mon  %d\n", func, line, tm->tm_mon);
37	pr_debug("%s:%d tm_year %d\n", func, line, tm->tm_year);
38	pr_debug("%s:%d tm_wday %d\n", func, line, tm->tm_wday);
39}
40
41#define dump_time(_a) _dump_time(_a, __func__, __LINE__)
42static void __attribute__ ((unused)) _dump_time(int time, const char* func,
43	int line)
44{
45	struct rtc_time tm;
46
47	to_tm(time, &tm);
48
49	pr_debug("%s:%d time    %d\n", func, line, time);
50	_dump_tm(&tm, func, line);
51}
52
53/**
54 * rtc_shift - Difference in seconds between 1970 and the ps3 rtc value.
55 */
56
57static s64 rtc_shift;
58
59void __init ps3_calibrate_decr(void)
60{
61	int result;
62	u64 tmp;
63
64	result = ps3_repository_read_be_tb_freq(0, &tmp);
65	BUG_ON(result);
66
67	ppc_tb_freq = tmp;
68	ppc_proc_freq = ppc_tb_freq * 40;
69
70	rtc_shift = ps3_os_area_rtc_diff();
71}
72
73static u64 read_rtc(void)
74{
75	int result;
76	u64 rtc_val;
77	u64 tb_val;
78
79	result = lv1_get_rtc(&rtc_val, &tb_val);
80	BUG_ON(result);
81
82	return rtc_val;
83}
84
85int ps3_set_rtc_time(struct rtc_time *tm)
86{
87	u64 now = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
88		tm->tm_hour, tm->tm_min, tm->tm_sec);
89
90	rtc_shift = now - read_rtc();
91	return 0;
92}
93
94void ps3_get_rtc_time(struct rtc_time *tm)
95{
96	to_tm(read_rtc() + rtc_shift, tm);
97	tm->tm_year -= 1900;
98	tm->tm_mon -= 1;
99}
100
101unsigned long __init ps3_get_boot_time(void)
102{
103	return read_rtc() + rtc_shift;
104}
105