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// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * PS3 RTC Driver
 4 *
 5 * Copyright 2009 Sony Corporation
 
 
 
 
 
 
 
 
 
 
 
 
 
 6 */
 7
 8#include <linux/kernel.h>
 9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/rtc.h>
12
13#include <asm/lv1call.h>
14#include <asm/ps3.h>
15
16
17static u64 read_rtc(void)
18{
19	int result;
20	u64 rtc_val;
21	u64 tb_val;
22
23	result = lv1_get_rtc(&rtc_val, &tb_val);
24	BUG_ON(result);
25
26	return rtc_val;
27}
28
29static int ps3_get_time(struct device *dev, struct rtc_time *tm)
30{
31	rtc_time64_to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
32	return 0;
33}
34
35static int ps3_set_time(struct device *dev, struct rtc_time *tm)
36{
37	ps3_os_area_set_rtc_diff(rtc_tm_to_time64(tm) - read_rtc());
 
 
 
38	return 0;
39}
40
41static const struct rtc_class_ops ps3_rtc_ops = {
42	.read_time = ps3_get_time,
43	.set_time = ps3_set_time,
44};
45
46static int __init ps3_rtc_probe(struct platform_device *dev)
47{
48	struct rtc_device *rtc;
49
50	rtc = devm_rtc_allocate_device(&dev->dev);
 
51	if (IS_ERR(rtc))
52		return PTR_ERR(rtc);
53
54	rtc->ops = &ps3_rtc_ops;
55	rtc->range_max = U64_MAX;
56
57	platform_set_drvdata(dev, rtc);
 
 
58
59	return rtc_register_device(rtc);
 
 
 
60}
61
62static struct platform_driver ps3_rtc_driver = {
63	.driver = {
64		.name = "rtc-ps3",
 
65	},
 
66};
67
68module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
 
 
 
 
 
 
 
 
 
 
 
69
70MODULE_AUTHOR("Sony Corporation");
71MODULE_LICENSE("GPL");
72MODULE_DESCRIPTION("ps3 RTC driver");
73MODULE_ALIAS("platform:rtc-ps3");