/* * 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");