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| 1 | /* |
| 2 | * RTC subsystem, proc interface |
| 3 | * |
| 4 | * Copyright (C) 2005-06 Tower Technologies |
| 5 | * Author: Alessandro Zummo <a.zummo@towertech.it> |
| 6 | * |
| 7 | * based on arch/arm/common/rtctime.c |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/rtc.h> |
| 16 | #include <linux/proc_fs.h> |
| 17 | #include <linux/seq_file.h> |
| 18 | |
| 19 | #include "rtc-core.h" |
| 20 | |
| 21 | |
| 22 | static int rtc_proc_show(struct seq_file *seq, void *offset) |
| 23 | { |
| 24 | int err; |
| 25 | struct rtc_device *rtc = seq->private; |
| 26 | const struct rtc_class_ops *ops = rtc->ops; |
| 27 | struct rtc_wkalrm alrm; |
| 28 | struct rtc_time tm; |
| 29 | |
| 30 | err = rtc_read_time(rtc, &tm); |
| 31 | if (err == 0) { |
| 32 | seq_printf(seq, |
| 33 | "rtc_time\t: %02d:%02d:%02d\n" |
| 34 | "rtc_date\t: %04d-%02d-%02d\n", |
| 35 | tm.tm_hour, tm.tm_min, tm.tm_sec, |
| 36 | tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); |
| 37 | } |
| 38 | |
| 39 | err = rtc_read_alarm(rtc, &alrm); |
| 40 | if (err == 0) { |
| 41 | seq_printf(seq, "alrm_time\t: "); |
| 42 | if ((unsigned int)alrm.time.tm_hour <= 24) |
| 43 | seq_printf(seq, "%02d:", alrm.time.tm_hour); |
| 44 | else |
| 45 | seq_printf(seq, "**:"); |
| 46 | if ((unsigned int)alrm.time.tm_min <= 59) |
| 47 | seq_printf(seq, "%02d:", alrm.time.tm_min); |
| 48 | else |
| 49 | seq_printf(seq, "**:"); |
| 50 | if ((unsigned int)alrm.time.tm_sec <= 59) |
| 51 | seq_printf(seq, "%02d\n", alrm.time.tm_sec); |
| 52 | else |
| 53 | seq_printf(seq, "**\n"); |
| 54 | |
| 55 | seq_printf(seq, "alrm_date\t: "); |
| 56 | if ((unsigned int)alrm.time.tm_year <= 200) |
| 57 | seq_printf(seq, "%04d-", alrm.time.tm_year + 1900); |
| 58 | else |
| 59 | seq_printf(seq, "****-"); |
| 60 | if ((unsigned int)alrm.time.tm_mon <= 11) |
| 61 | seq_printf(seq, "%02d-", alrm.time.tm_mon + 1); |
| 62 | else |
| 63 | seq_printf(seq, "**-"); |
| 64 | if (alrm.time.tm_mday && (unsigned int)alrm.time.tm_mday <= 31) |
| 65 | seq_printf(seq, "%02d\n", alrm.time.tm_mday); |
| 66 | else |
| 67 | seq_printf(seq, "**\n"); |
| 68 | seq_printf(seq, "alarm_IRQ\t: %s\n", |
| 69 | alrm.enabled ? "yes" : "no"); |
| 70 | seq_printf(seq, "alrm_pending\t: %s\n", |
| 71 | alrm.pending ? "yes" : "no"); |
| 72 | seq_printf(seq, "update IRQ enabled\t: %s\n", |
| 73 | (rtc->uie_rtctimer.enabled) ? "yes" : "no"); |
| 74 | seq_printf(seq, "periodic IRQ enabled\t: %s\n", |
| 75 | (rtc->pie_enabled) ? "yes" : "no"); |
| 76 | seq_printf(seq, "periodic IRQ frequency\t: %d\n", |
| 77 | rtc->irq_freq); |
| 78 | seq_printf(seq, "max user IRQ frequency\t: %d\n", |
| 79 | rtc->max_user_freq); |
| 80 | } |
| 81 | |
| 82 | seq_printf(seq, "24hr\t\t: yes\n"); |
| 83 | |
| 84 | if (ops->proc) |
| 85 | ops->proc(rtc->dev.parent, seq); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static int rtc_proc_open(struct inode *inode, struct file *file) |
| 91 | { |
| 92 | int ret; |
| 93 | struct rtc_device *rtc = PDE(inode)->data; |
| 94 | |
| 95 | if (!try_module_get(THIS_MODULE)) |
| 96 | return -ENODEV; |
| 97 | |
| 98 | ret = single_open(file, rtc_proc_show, rtc); |
| 99 | if (ret) |
| 100 | module_put(THIS_MODULE); |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | static int rtc_proc_release(struct inode *inode, struct file *file) |
| 105 | { |
| 106 | int res = single_release(inode, file); |
| 107 | module_put(THIS_MODULE); |
| 108 | return res; |
| 109 | } |
| 110 | |
| 111 | static const struct file_operations rtc_proc_fops = { |
| 112 | .open = rtc_proc_open, |
| 113 | .read = seq_read, |
| 114 | .llseek = seq_lseek, |
| 115 | .release = rtc_proc_release, |
| 116 | }; |
| 117 | |
| 118 | void rtc_proc_add_device(struct rtc_device *rtc) |
| 119 | { |
| 120 | if (rtc->id == 0) |
| 121 | proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc); |
| 122 | } |
| 123 | |
| 124 | void rtc_proc_del_device(struct rtc_device *rtc) |
| 125 | { |
| 126 | if (rtc->id == 0) |
| 127 | remove_proc_entry("driver/rtc", NULL); |
| 128 | } |
| 129 |
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