[mirror_ubuntu-artful-kernel.git] / drivers / rtc / rtc-proc.c

/*
 * 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>

#include "rtc-core.h"

#define NAME_SIZE	10

#if defined(CONFIG_RTC_HCTOSYS_DEVICE)
static bool is_rtc_hctosys(struct rtc_device *rtc)
{
	int size;
	char name[NAME_SIZE];

	size = scnprintf(name, NAME_SIZE, "rtc%d", rtc->id);
	if (size > NAME_SIZE)
		return false;

	return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);
}
#else
static bool is_rtc_hctosys(struct rtc_device *rtc)
{
	return (rtc->id == 0);
}
#endif

static int rtc_proc_show(struct seq_file *seq, void *offset)
{
	int err;
	struct rtc_device *rtc = seq->private;
	const struct rtc_class_ops *ops = rtc->ops;
	struct rtc_wkalrm alrm;
	struct rtc_time tm;

	err = rtc_read_time(rtc, &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(rtc, &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 (alrm.time.tm_mday && (unsigned int)alrm.time.tm_mday <= 31)
			seq_printf(seq, "%02d\n", alrm.time.tm_mday);
		else
			seq_printf(seq, "**\n");
		seq_printf(seq, "alarm_IRQ\t: %s\n",
				alrm.enabled ? "yes" : "no");
		seq_printf(seq, "alrm_pending\t: %s\n",
				alrm.pending ? "yes" : "no");
		seq_printf(seq, "update IRQ enabled\t: %s\n",
			(rtc->uie_rtctimer.enabled) ? "yes" : "no");
		seq_printf(seq, "periodic IRQ enabled\t: %s\n",
			(rtc->pie_enabled) ? "yes" : "no");
		seq_printf(seq, "periodic IRQ frequency\t: %d\n",
			rtc->irq_freq);
		seq_printf(seq, "max user IRQ frequency\t: %d\n",
			rtc->max_user_freq);
	}

	seq_printf(seq, "24hr\t\t: yes\n");

	if (ops->proc)
		ops->proc(rtc->dev.parent, seq);

	return 0;
}

static int rtc_proc_open(struct inode *inode, struct file *file)
{
	int ret;
	struct rtc_device *rtc = PDE_DATA(inode);

	if (!try_module_get(rtc->owner))
		return -ENODEV;

	ret = single_open(file, rtc_proc_show, rtc);
	if (ret)
		module_put(rtc->owner);
	return ret;
}

static int rtc_proc_release(struct inode *inode, struct file *file)
{
	int res = single_release(inode, file);
	struct rtc_device *rtc = PDE_DATA(inode);

	module_put(rtc->owner);
	return res;
}

static const struct file_operations rtc_proc_fops = {
	.open		= rtc_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= rtc_proc_release,
};

void rtc_proc_add_device(struct rtc_device *rtc)
{
	if (is_rtc_hctosys(rtc))
		proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc);
}

void rtc_proc_del_device(struct rtc_device *rtc)
{
	if (is_rtc_hctosys(rtc))
		remove_proc_entry("driver/rtc", NULL);
}
Commit	Line	Data
728a2947 AZ	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
ab6a2d70 DB	19	#include "rtc-core.h"
ab6a2d70 DB	20
92589c98 KM	21	#define NAME_SIZE 10
	22
	23	#if defined(CONFIG_RTC_HCTOSYS_DEVICE)
	24	static bool is_rtc_hctosys(struct rtc_device *rtc)
	25	{
	26	int size;
	27	char name[NAME_SIZE];
	28
	29	size = scnprintf(name, NAME_SIZE, "rtc%d", rtc->id);
	30	if (size > NAME_SIZE)
	31	return false;
	32
	33	return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);
	34	}
	35	#else
	36	static bool is_rtc_hctosys(struct rtc_device *rtc)
	37	{
	38	return (rtc->id == 0);
	39	}
	40	#endif
ab6a2d70	41
728a2947 AZ	42	static int rtc_proc_show(struct seq_file seq, void offset)
	43	{
	44	int err;
ab6a2d70 DB	45	struct rtc_device *rtc = seq->private;
ab6a2d70 DB	46	const struct rtc_class_ops *ops = rtc->ops;
728a2947 AZ	47	struct rtc_wkalrm alrm;
	48	struct rtc_time tm;
	49
ab6a2d70	50	err = rtc_read_time(rtc, &tm);
728a2947 AZ	51	if (err == 0) {
	52	seq_printf(seq,
	53	"rtc_time\t: %02d:%02d:%02d\n"
	54	"rtc_date\t: %04d-%02d-%02d\n",
	55	tm.tm_hour, tm.tm_min, tm.tm_sec,
	56	tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
	57	}
	58
ab6a2d70	59	err = rtc_read_alarm(rtc, &alrm);
728a2947 AZ	60	if (err == 0) {
	61	seq_printf(seq, "alrm_time\t: ");
	62	if ((unsigned int)alrm.time.tm_hour <= 24)
	63	seq_printf(seq, "%02d:", alrm.time.tm_hour);
	64	else
	65	seq_printf(seq, "**:");
	66	if ((unsigned int)alrm.time.tm_min <= 59)
	67	seq_printf(seq, "%02d:", alrm.time.tm_min);
	68	else
	69	seq_printf(seq, "**:");
	70	if ((unsigned int)alrm.time.tm_sec <= 59)
	71	seq_printf(seq, "%02d\n", alrm.time.tm_sec);
	72	else
	73	seq_printf(seq, "**\n");
	74
	75	seq_printf(seq, "alrm_date\t: ");
	76	if ((unsigned int)alrm.time.tm_year <= 200)
	77	seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);
	78	else
	79	seq_printf(seq, "****-");
	80	if ((unsigned int)alrm.time.tm_mon <= 11)
	81	seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
	82	else
	83	seq_printf(seq, "**-");
db621f17	84	if (alrm.time.tm_mday && (unsigned int)alrm.time.tm_mday <= 31)
728a2947 AZ	85	seq_printf(seq, "%02d\n", alrm.time.tm_mday);
	86	else
	87	seq_printf(seq, "**\n");
a2db8dfc	88	seq_printf(seq, "alarm_IRQ\t: %s\n",
728a2947 AZ	89	alrm.enabled ? "yes" : "no");
	90	seq_printf(seq, "alrm_pending\t: %s\n",
	91	alrm.pending ? "yes" : "no");
bca8521c MRJ	92	seq_printf(seq, "update IRQ enabled\t: %s\n",
	93	(rtc->uie_rtctimer.enabled) ? "yes" : "no");
	94	seq_printf(seq, "periodic IRQ enabled\t: %s\n",
	95	(rtc->pie_enabled) ? "yes" : "no");
	96	seq_printf(seq, "periodic IRQ frequency\t: %d\n",
	97	rtc->irq_freq);
	98	seq_printf(seq, "max user IRQ frequency\t: %d\n",
	99	rtc->max_user_freq);
728a2947 AZ	100	}
728a2947 AZ	101
adfb4341 AZ	102	seq_printf(seq, "24hr\t\t: yes\n");
adfb4341 AZ	103
728a2947	104	if (ops->proc)
cd966209	105	ops->proc(rtc->dev.parent, seq);
728a2947 AZ	106
	107	return 0;
	108	}
	109
	110	static int rtc_proc_open(struct inode inode, struct file file)
	111	{
24a6f5b8	112	int ret;
d9dda78b	113	struct rtc_device *rtc = PDE_DATA(inode);
728a2947	114
b01079be	115	if (!try_module_get(rtc->owner))
728a2947 AZ	116	return -ENODEV;
728a2947 AZ	117
24a6f5b8 AS	118	ret = single_open(file, rtc_proc_show, rtc);
24a6f5b8 AS	119	if (ret)
b01079be	120	module_put(rtc->owner);
24a6f5b8	121	return ret;
728a2947 AZ	122	}
	123
	124	static int rtc_proc_release(struct inode inode, struct file file)
	125	{
	126	int res = single_release(inode, file);
b01079be GT	127	struct rtc_device *rtc = PDE_DATA(inode);
	128
	129	module_put(rtc->owner);
728a2947 AZ	130	return res;
	131	}
	132
d54b1fdb	133	static const struct file_operations rtc_proc_fops = {
728a2947 AZ	134	.open = rtc_proc_open,
	135	.read = seq_read,
	136	.llseek = seq_lseek,
	137	.release = rtc_proc_release,
	138	};
	139
7d9f99ec	140	void rtc_proc_add_device(struct rtc_device *rtc)
728a2947	141	{
92589c98	142	if (is_rtc_hctosys(rtc))
99b76233	143	proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc);
728a2947 AZ	144	}
728a2947 AZ	145
7d9f99ec	146	void rtc_proc_del_device(struct rtc_device *rtc)
728a2947	147	{
92589c98	148	if (is_rtc_hctosys(rtc))
728a2947	149	remove_proc_entry("driver/rtc", NULL);
728a2947	150	}