1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/*
* RTC subsystem, proc interface
*
* Copyright (C) 2005-06 Tower Technologies
* Author: Alessandro Zummo <a.zummo@towertech.it>
*
* based on arch/arm/common/rtctime.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
static struct class_device *rtc_dev = NULL;
static DEFINE_MUTEX(rtc_lock);
static int rtc_proc_show(struct seq_file *seq, void *offset)
{
int err;
struct class_device *class_dev = seq->private;
struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
struct rtc_wkalrm alrm;
struct rtc_time tm;
err = rtc_read_time(class_dev, &tm);
if (err == 0) {
seq_printf(seq,
"rtc_time\t: %02d:%02d:%02d\n"
"rtc_date\t: %04d-%02d-%02d\n",
tm.tm_hour, tm.tm_min, tm.tm_sec,
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
}
err = rtc_read_alarm(class_dev, &alrm);
if (err == 0) {
seq_printf(seq, "alrm_time\t: ");
if ((unsigned int)alrm.time.tm_hour <= 24)
seq_printf(seq, "%02d:", alrm.time.tm_hour);
else
seq_printf(seq, "**:");
if ((unsigned int)alrm.time.tm_min <= 59)
seq_printf(seq, "%02d:", alrm.time.tm_min);
else
seq_printf(seq, "**:");
if ((unsigned int)alrm.time.tm_sec <= 59)
seq_printf(seq, "%02d\n", alrm.time.tm_sec);
else
seq_printf(seq, "**\n");
seq_printf(seq, "alrm_date\t: ");
if ((unsigned int)alrm.time.tm_year <= 200)
seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);
else
seq_printf(seq, "****-");
if ((unsigned int)alrm.time.tm_mon <= 11)
seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
else
seq_printf(seq, "**-");
if ((unsigned int)alrm.time.tm_mday <= 31)
seq_printf(seq, "%02d\n", alrm.time.tm_mday);
else
seq_printf(seq, "**\n");
seq_printf(seq, "alrm_wakeup\t: %s\n",
alrm.enabled ? "yes" : "no");
seq_printf(seq, "alrm_pending\t: %s\n",
alrm.pending ? "yes" : "no");
}
seq_printf(seq, "24hr\t\t: yes\n");
if (ops->proc)
ops->proc(class_dev->dev, seq);
return 0;
}
static int rtc_proc_open(struct inode *inode, struct file *file)
{
struct class_device *class_dev = PDE(inode)->data;
if (!try_module_get(THIS_MODULE))
return -ENODEV;
return single_open(file, rtc_proc_show, class_dev);
}
static int rtc_proc_release(struct inode *inode, struct file *file)
{
int res = single_release(inode, file);
module_put(THIS_MODULE);
return res;
}
static struct file_operations rtc_proc_fops = {
.open = rtc_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = rtc_proc_release,
};
static int rtc_proc_add_device(struct class_device *class_dev,
struct class_interface *class_intf)
{
mutex_lock(&rtc_lock);
if (rtc_dev == NULL) {
struct proc_dir_entry *ent;
rtc_dev = class_dev;
ent = create_proc_entry("driver/rtc", 0, NULL);
if (ent) {
struct rtc_device *rtc = to_rtc_device(class_dev);
ent->proc_fops = &rtc_proc_fops;
ent->owner = rtc->owner;
ent->data = class_dev;
dev_info(class_dev->dev, "rtc intf: proc\n");
}
else
rtc_dev = NULL;
}
mutex_unlock(&rtc_lock);
return 0;
}
static void rtc_proc_remove_device(struct class_device *class_dev,
struct class_interface *class_intf)
{
mutex_lock(&rtc_lock);
if (rtc_dev == class_dev) {
remove_proc_entry("driver/rtc", NULL);
rtc_dev = NULL;
}
mutex_unlock(&rtc_lock);
}
static struct class_interface rtc_proc_interface = {
.add = &rtc_proc_add_device,
.remove = &rtc_proc_remove_device,
};
static int __init rtc_proc_init(void)
{
return rtc_interface_register(&rtc_proc_interface);
}
static void __exit rtc_proc_exit(void)
{
class_interface_unregister(&rtc_proc_interface);
}
subsys_initcall(rtc_proc_init);
module_exit(rtc_proc_exit);
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("RTC class proc interface");
MODULE_LICENSE("GPL");
|
