git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 0b5f037a GU |
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"); |