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 #include <linux/platform_device.h>
23
24 #include <asm/firmware.h>
25 #include <asm/rtc.h>
26 #include <asm/lv1call.h>
27 #include <asm/ps3.h>
28
29 #include "platform.h"
30
31 #define dump_tm(_a) _dump_tm(_a, __func__, __LINE__)
_dump_tm(const struct rtc_time * tm,const char * func,int line)32 static void _dump_tm(const struct rtc_time *tm, const char* func, int line)
33 {
34 pr_debug("%s:%d tm_sec %d\n", func, line, tm->tm_sec);
35 pr_debug("%s:%d tm_min %d\n", func, line, tm->tm_min);
36 pr_debug("%s:%d tm_hour %d\n", func, line, tm->tm_hour);
37 pr_debug("%s:%d tm_mday %d\n", func, line, tm->tm_mday);
38 pr_debug("%s:%d tm_mon %d\n", func, line, tm->tm_mon);
39 pr_debug("%s:%d tm_year %d\n", func, line, tm->tm_year);
40 pr_debug("%s:%d tm_wday %d\n", func, line, tm->tm_wday);
41 }
42
43 #define dump_time(_a) _dump_time(_a, __func__, __LINE__)
_dump_time(int time,const char * func,int line)44 static void __maybe_unused _dump_time(int time, const char *func,
45 int line)
46 {
47 struct rtc_time tm;
48
49 to_tm(time, &tm);
50
51 pr_debug("%s:%d time %d\n", func, line, time);
52 _dump_tm(&tm, func, line);
53 }
54
ps3_calibrate_decr(void)55 void __init ps3_calibrate_decr(void)
56 {
57 int result;
58 u64 tmp;
59
60 result = ps3_repository_read_be_tb_freq(0, &tmp);
61 BUG_ON(result);
62
63 ppc_tb_freq = tmp;
64 ppc_proc_freq = ppc_tb_freq * 40;
65 }
66
read_rtc(void)67 static u64 read_rtc(void)
68 {
69 int result;
70 u64 rtc_val;
71 u64 tb_val;
72
73 result = lv1_get_rtc(&rtc_val, &tb_val);
74 BUG_ON(result);
75
76 return rtc_val;
77 }
78
ps3_get_boot_time(void)79 unsigned long __init ps3_get_boot_time(void)
80 {
81 return read_rtc() + ps3_os_area_get_rtc_diff();
82 }
83
ps3_rtc_init(void)84 static int __init ps3_rtc_init(void)
85 {
86 struct platform_device *pdev;
87
88 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
89 return -ENODEV;
90
91 pdev = platform_device_register_simple("rtc-ps3", -1, NULL, 0);
92 if (IS_ERR(pdev))
93 return PTR_ERR(pdev);
94
95 return 0;
96 }
97
98 module_init(ps3_rtc_init);
99