mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-05 05:20:37 +02:00
f2e8193802
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18927 3c298f89-4303-0410-b956-a3cf2f4a3e73
366 lines
8.9 KiB
C
366 lines
8.9 KiB
C
/*
|
|
* LED Morse Trigger
|
|
*
|
|
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
|
|
*
|
|
* This file was based on: drivers/led/ledtrig-timer.c
|
|
* Copyright 2005-2006 Openedhand Ltd.
|
|
* Author: Richard Purdie <rpurdie@openedhand.com>
|
|
*
|
|
* also based on the patch '[PATCH] 2.5.59 morse code panics' posted
|
|
* in the LKML by Tomas Szepe at Thu, 30 Jan 2003
|
|
* Copyright (C) 2002 Andrew Rodland <arodland@noln.com>
|
|
* Copyright (C) 2003 Tomas Szepe <szepe@pinerecords.com>
|
|
*
|
|
* 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/kernel.h>
|
|
#include <linux/version.h>
|
|
#include <linux/module.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/init.h>
|
|
#include <linux/list.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/device.h>
|
|
#include <linux/sysdev.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/leds.h>
|
|
|
|
#include "leds.h"
|
|
|
|
#define MORSE_DELAY_BASE (HZ/2)
|
|
|
|
#define MORSE_STATE_BLINK_START 0
|
|
#define MORSE_STATE_BLINK_STOP 1
|
|
|
|
#define MORSE_DIT_LEN 1
|
|
#define MORSE_DAH_LEN 3
|
|
#define MORSE_SPACE_LEN 7
|
|
|
|
struct morse_trig_data {
|
|
unsigned long delay;
|
|
char *msg;
|
|
|
|
unsigned char morse;
|
|
unsigned char state;
|
|
char *msgpos;
|
|
struct timer_list timer;
|
|
};
|
|
|
|
const unsigned char morsetable[] = {
|
|
0122, 0, 0310, 0, 0, 0163, /* "#$%&' */
|
|
055, 0155, 0, 0, 0163, 0141, 0152, 0051, /* ()*+,-./ */
|
|
077, 076, 074, 070, 060, 040, 041, 043, 047, 057, /* 0-9 */
|
|
0107, 0125, 0, 0061, 0, 0114, 0, /* :;<=>?@ */
|
|
006, 021, 025, 011, 002, 024, 013, 020, 004, /* A-I */
|
|
036, 015, 022, 007, 005, 017, 026, 033, 012, /* J-R */
|
|
010, 003, 014, 030, 016, 031, 035, 023, /* S-Z */
|
|
0, 0, 0, 0, 0154 /* [\]^_ */
|
|
};
|
|
|
|
static inline unsigned char tomorse(char c) {
|
|
if (c >= 'a' && c <= 'z')
|
|
c = c - 'a' + 'A';
|
|
if (c >= '"' && c <= '_') {
|
|
return morsetable[c - '"'];
|
|
} else
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned long dit_len(struct morse_trig_data *morse_data)
|
|
{
|
|
return MORSE_DIT_LEN*morse_data->delay;
|
|
}
|
|
|
|
static inline unsigned long dah_len(struct morse_trig_data *morse_data)
|
|
{
|
|
return MORSE_DAH_LEN*morse_data->delay;
|
|
}
|
|
|
|
static inline unsigned long space_len(struct morse_trig_data *morse_data)
|
|
{
|
|
return MORSE_SPACE_LEN*morse_data->delay;
|
|
}
|
|
|
|
static void morse_timer_function(unsigned long data)
|
|
{
|
|
struct led_classdev *led_cdev = (struct led_classdev *)data;
|
|
struct morse_trig_data *morse_data = led_cdev->trigger_data;
|
|
unsigned long brightness = LED_OFF;
|
|
unsigned long delay = 0;
|
|
|
|
if (!morse_data->msg)
|
|
goto set_led;
|
|
|
|
switch (morse_data->state) {
|
|
case MORSE_STATE_BLINK_START:
|
|
/* Starting a new blink. We have a valid code in morse. */
|
|
delay = (morse_data->morse & 001) ? dah_len(morse_data):
|
|
dit_len(morse_data);
|
|
brightness = LED_FULL;
|
|
morse_data->state = MORSE_STATE_BLINK_STOP;
|
|
morse_data->morse >>= 1;
|
|
break;
|
|
case MORSE_STATE_BLINK_STOP:
|
|
/* Coming off of a blink. */
|
|
morse_data->state = MORSE_STATE_BLINK_START;
|
|
|
|
if (morse_data->morse > 1) {
|
|
/* Not done yet, just a one-dit pause. */
|
|
delay = dit_len(morse_data);
|
|
break;
|
|
}
|
|
|
|
/* Get a new char, figure out how much space. */
|
|
/* First time through */
|
|
if (!morse_data->msgpos)
|
|
morse_data->msgpos = (char *)morse_data->msg;
|
|
|
|
if (!*morse_data->msgpos) {
|
|
/* Repeating */
|
|
morse_data->msgpos = (char *)morse_data->msg;
|
|
delay = space_len(morse_data);
|
|
} else {
|
|
/* Inter-letter space */
|
|
delay = dah_len(morse_data);
|
|
}
|
|
|
|
if (!(morse_data->morse = tomorse(*morse_data->msgpos))) {
|
|
delay = space_len(morse_data);
|
|
/* And get us back here */
|
|
morse_data->state = MORSE_STATE_BLINK_STOP;
|
|
}
|
|
morse_data->msgpos++;
|
|
break;
|
|
}
|
|
|
|
mod_timer(&morse_data->timer, jiffies + msecs_to_jiffies(delay));
|
|
|
|
set_led:
|
|
led_set_brightness(led_cdev, brightness);
|
|
}
|
|
|
|
static ssize_t _morse_delay_show(struct led_classdev *led_cdev, char *buf)
|
|
{
|
|
struct morse_trig_data *morse_data = led_cdev->trigger_data;
|
|
|
|
sprintf(buf, "%lu\n", morse_data->delay);
|
|
|
|
return strlen(buf) + 1;
|
|
}
|
|
|
|
static ssize_t _morse_delay_store(struct led_classdev *led_cdev,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct morse_trig_data *morse_data = led_cdev->trigger_data;
|
|
char *after;
|
|
unsigned long state = simple_strtoul(buf, &after, 10);
|
|
size_t count = after - buf;
|
|
int ret = -EINVAL;
|
|
|
|
if (*after && isspace(*after))
|
|
count++;
|
|
|
|
if (count == size) {
|
|
morse_data->delay = state;
|
|
mod_timer(&morse_data->timer, jiffies + 1);
|
|
ret = count;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t _morse_msg_show(struct led_classdev *led_cdev, char *buf)
|
|
{
|
|
struct morse_trig_data *morse_data = led_cdev->trigger_data;
|
|
|
|
if (!morse_data->msg)
|
|
sprintf(buf, "<none>\n");
|
|
else
|
|
sprintf(buf, "%s\n", morse_data->msg);
|
|
|
|
return strlen(buf) + 1;
|
|
}
|
|
|
|
static ssize_t _morse_msg_store(struct led_classdev *led_cdev,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct morse_trig_data *morse_data = led_cdev->trigger_data;
|
|
char *m;
|
|
|
|
m = kmalloc(size, GFP_KERNEL);
|
|
if (!m)
|
|
return -ENOMEM;
|
|
|
|
memcpy(m,buf,size);
|
|
m[size]='\0';
|
|
|
|
if (morse_data->msg)
|
|
kfree(morse_data->msg);
|
|
|
|
morse_data->msg = m;
|
|
morse_data->msgpos = NULL;
|
|
morse_data->state = MORSE_STATE_BLINK_STOP;
|
|
|
|
mod_timer(&morse_data->timer, jiffies + 1);
|
|
|
|
return size;
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
|
|
static ssize_t morse_delay_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct led_classdev *led_cdev = dev_get_drvdata(dev);
|
|
|
|
return _morse_delay_show(led_cdev, buf);
|
|
}
|
|
|
|
static ssize_t morse_delay_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
struct led_classdev *led_cdev = dev_get_drvdata(dev);
|
|
|
|
return _morse_delay_store(led_cdev, buf, size);
|
|
}
|
|
|
|
static ssize_t morse_msg_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct led_classdev *led_cdev = dev_get_drvdata(dev);
|
|
|
|
return _morse_msg_show(led_cdev, buf);
|
|
}
|
|
|
|
static ssize_t morse_msg_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t size)
|
|
{
|
|
struct led_classdev *led_cdev = dev_get_drvdata(dev);
|
|
|
|
return _morse_msg_store(led_cdev, buf, size);
|
|
}
|
|
|
|
static DEVICE_ATTR(delay, 0644, morse_delay_show, morse_delay_store);
|
|
static DEVICE_ATTR(message, 0644, morse_msg_show, morse_msg_store);
|
|
|
|
#define led_device_create_file(leddev, attr) \
|
|
device_create_file(leddev->dev, &dev_attr_ ## attr)
|
|
#define led_device_remove_file(leddev, attr) \
|
|
device_remove_file(leddev->dev, &dev_attr_ ## attr)
|
|
|
|
#else
|
|
static ssize_t morse_delay_show(struct class_device *dev, char *buf)
|
|
{
|
|
struct led_classdev *led_cdev = class_get_devdata(dev);
|
|
|
|
return _morse_delay_show(led_cdev, buf);
|
|
}
|
|
|
|
static ssize_t morse_delay_store(struct class_device *dev, const char *buf,
|
|
size_t size)
|
|
{
|
|
struct led_classdev *led_cdev = class_get_devdata(dev);
|
|
|
|
return _morse_delay_store(led_cdev, buf, size);
|
|
}
|
|
|
|
static ssize_t morse_msg_show(struct class_device *dev, char *buf)
|
|
{
|
|
struct led_classdev *led_cdev = class_get_devdata(dev);
|
|
|
|
return _morse_msg_show(led_cdev, buf);
|
|
}
|
|
|
|
static ssize_t morse_msg_store(struct class_device *dev, const char *buf,
|
|
size_t size)
|
|
{
|
|
struct led_classdev *led_cdev = class_get_devdata(dev);
|
|
|
|
return _morse_msg_store(led_cdev, buf, size);
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(delay, 0644, morse_delay_show, morse_delay_store);
|
|
static CLASS_DEVICE_ATTR(message, 0644, morse_msg_show, morse_msg_store);
|
|
|
|
#define led_device_create_file(leddev, attr) \
|
|
class_device_create_file(leddev->class_dev, &class_device_attr_ ## attr)
|
|
#define led_device_remove_file(leddev, attr) \
|
|
class_device_remove_file(leddev->class_dev, &class_device_attr_ ## attr)
|
|
|
|
#endif
|
|
|
|
static void morse_trig_activate(struct led_classdev *led_cdev)
|
|
{
|
|
struct morse_trig_data *morse_data;
|
|
int rc;
|
|
|
|
morse_data = kzalloc(sizeof(*morse_data), GFP_KERNEL);
|
|
if (!morse_data)
|
|
return;
|
|
|
|
morse_data->delay = MORSE_DELAY_BASE;
|
|
init_timer(&morse_data->timer);
|
|
morse_data->timer.function = morse_timer_function;
|
|
morse_data->timer.data = (unsigned long)led_cdev;
|
|
|
|
rc = led_device_create_file(led_cdev, delay);
|
|
if (rc) goto err;
|
|
|
|
rc = led_device_create_file(led_cdev, message);
|
|
if (rc) goto err_delay;
|
|
|
|
led_cdev->trigger_data = morse_data;
|
|
|
|
return;
|
|
|
|
err_delay:
|
|
led_device_remove_file(led_cdev, delay);
|
|
err:
|
|
kfree(morse_data);
|
|
}
|
|
|
|
static void morse_trig_deactivate(struct led_classdev *led_cdev)
|
|
{
|
|
struct morse_trig_data *morse_data = led_cdev->trigger_data;
|
|
|
|
if (!morse_data)
|
|
return;
|
|
|
|
led_device_remove_file(led_cdev, message);
|
|
led_device_remove_file(led_cdev, delay);
|
|
|
|
del_timer_sync(&morse_data->timer);
|
|
if (morse_data->msg)
|
|
kfree(morse_data->msg);
|
|
|
|
kfree(morse_data);
|
|
}
|
|
|
|
static struct led_trigger morse_led_trigger = {
|
|
.name = "morse",
|
|
.activate = morse_trig_activate,
|
|
.deactivate = morse_trig_deactivate,
|
|
};
|
|
|
|
static int __init morse_trig_init(void)
|
|
{
|
|
return led_trigger_register(&morse_led_trigger);
|
|
}
|
|
|
|
static void __exit morse_trig_exit(void)
|
|
{
|
|
led_trigger_unregister(&morse_led_trigger);
|
|
}
|
|
|
|
module_init(morse_trig_init);
|
|
module_exit(morse_trig_exit);
|
|
|
|
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
|
|
MODULE_DESCRIPTION("Morse LED trigger");
|
|
MODULE_LICENSE("GPL");
|