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1/*
2 * PS3 RTC Driver
3 *
4 * Copyright 2009 Sony Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program.
17 * If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/platform_device.h>
23#include <linux/rtc.h>
24
25#include <asm/lv1call.h>
26#include <asm/ps3.h>
27
28
29static u64 read_rtc(void)
30{
31 int result;
32 u64 rtc_val;
33 u64 tb_val;
34
35 result = lv1_get_rtc(&rtc_val, &tb_val);
36 BUG_ON(result);
37
38 return rtc_val;
39}
40
41static int ps3_get_time(struct device *dev, struct rtc_time *tm)
42{
43 rtc_time_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
44 return rtc_valid_tm(tm);
45}
46
47static int ps3_set_time(struct device *dev, struct rtc_time *tm)
48{
49 unsigned long now;
50
51 rtc_tm_to_time(tm, &now);
52 ps3_os_area_set_rtc_diff(now - read_rtc());
53 return 0;
54}
55
56static const struct rtc_class_ops ps3_rtc_ops = {
57 .read_time = ps3_get_time,
58 .set_time = ps3_set_time,
59};
60
61static int __init ps3_rtc_probe(struct platform_device *dev)
62{
63 struct rtc_device *rtc;
64
65 rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops,
66 THIS_MODULE);
67 if (IS_ERR(rtc))
68 return PTR_ERR(rtc);
69
70 platform_set_drvdata(dev, rtc);
71 return 0;
72}
73
74static int __exit ps3_rtc_remove(struct platform_device *dev)
75{
76 rtc_device_unregister(platform_get_drvdata(dev));
77 return 0;
78}
79
80static struct platform_driver ps3_rtc_driver = {
81 .driver = {
82 .name = "rtc-ps3",
83 .owner = THIS_MODULE,
84 },
85 .remove = __exit_p(ps3_rtc_remove),
86};
87
88static int __init ps3_rtc_init(void)
89{
90 return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe);
91}
92
93static void __exit ps3_rtc_fini(void)
94{
95 platform_driver_unregister(&ps3_rtc_driver);
96}
97
98module_init(ps3_rtc_init);
99module_exit(ps3_rtc_fini);
100
101MODULE_AUTHOR("Sony Corporation");
102MODULE_LICENSE("GPL");
103MODULE_DESCRIPTION("ps3 RTC driver");
104MODULE_ALIAS("platform:rtc-ps3");
1/*
2 * PS3 RTC Driver
3 *
4 * Copyright 2009 Sony Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program.
17 * If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/platform_device.h>
23#include <linux/rtc.h>
24
25#include <asm/lv1call.h>
26#include <asm/ps3.h>
27
28
29static u64 read_rtc(void)
30{
31 int result;
32 u64 rtc_val;
33 u64 tb_val;
34
35 result = lv1_get_rtc(&rtc_val, &tb_val);
36 BUG_ON(result);
37
38 return rtc_val;
39}
40
41static int ps3_get_time(struct device *dev, struct rtc_time *tm)
42{
43 rtc_time_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
44 return rtc_valid_tm(tm);
45}
46
47static int ps3_set_time(struct device *dev, struct rtc_time *tm)
48{
49 unsigned long now;
50
51 rtc_tm_to_time(tm, &now);
52 ps3_os_area_set_rtc_diff(now - read_rtc());
53 return 0;
54}
55
56static const struct rtc_class_ops ps3_rtc_ops = {
57 .read_time = ps3_get_time,
58 .set_time = ps3_set_time,
59};
60
61static int __init ps3_rtc_probe(struct platform_device *dev)
62{
63 struct rtc_device *rtc;
64
65 rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops,
66 THIS_MODULE);
67 if (IS_ERR(rtc))
68 return PTR_ERR(rtc);
69
70 platform_set_drvdata(dev, rtc);
71 return 0;
72}
73
74static int __exit ps3_rtc_remove(struct platform_device *dev)
75{
76 rtc_device_unregister(platform_get_drvdata(dev));
77 return 0;
78}
79
80static struct platform_driver ps3_rtc_driver = {
81 .driver = {
82 .name = "rtc-ps3",
83 .owner = THIS_MODULE,
84 },
85 .remove = __exit_p(ps3_rtc_remove),
86};
87
88static int __init ps3_rtc_init(void)
89{
90 return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe);
91}
92
93static void __exit ps3_rtc_fini(void)
94{
95 platform_driver_unregister(&ps3_rtc_driver);
96}
97
98module_init(ps3_rtc_init);
99module_exit(ps3_rtc_fini);
100
101MODULE_AUTHOR("Sony Corporation");
102MODULE_LICENSE("GPL");
103MODULE_DESCRIPTION("ps3 RTC driver");
104MODULE_ALIAS("platform:rtc-ps3");