| Geert Uytterhoeven | 0b5f037 | 2009-02-24 14:04:20 +0100 | [diff] [blame] | 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 | |
| 29 | static 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 | |
| 41 | static 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 | |
| 47 | static 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 | |
| 56 | static const struct rtc_class_ops ps3_rtc_ops = { |
| 57 | .read_time = ps3_get_time, |
| 58 | .set_time = ps3_set_time, |
| 59 | }; |
| 60 | |
| 61 | static 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 | |
| 74 | static int __exit ps3_rtc_remove(struct platform_device *dev) |
| 75 | { |
| 76 | rtc_device_unregister(platform_get_drvdata(dev)); |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | static 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 | |
| 88 | static int __init ps3_rtc_init(void) |
| 89 | { |
| 90 | return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe); |
| 91 | } |
| 92 | |
| 93 | static void __exit ps3_rtc_fini(void) |
| 94 | { |
| 95 | platform_driver_unregister(&ps3_rtc_driver); |
| 96 | } |
| 97 | |
| 98 | module_init(ps3_rtc_init); |
| 99 | module_exit(ps3_rtc_fini); |
| 100 | |
| 101 | MODULE_AUTHOR("Sony Corporation"); |
| 102 | MODULE_LICENSE("GPL"); |
| 103 | MODULE_DESCRIPTION("ps3 RTC driver"); |
| 104 | MODULE_ALIAS("platform:rtc-ps3"); |