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morse LED trigger cleanups 

SVN-Revision: 9054
owl
Gabor Juhos 2007-09-28 19:01:19 +00:00
parent c0b6f79730
commit e56807cce4
1 changed files with 30 additions and 20 deletions
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50
target/linux/adm5120/files/drivers/leds/ledtrig-morse.c
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@ -32,6 +32,15 @@
#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;
@ -64,17 +73,17 @@ static inline unsigned char tomorse(char c) {
static inline unsigned long dit_len(struct morse_trig_data *morse_data)
{
return morse_data->delay;
return MORSE_DIT_LEN*morse_data->delay;
}
static inline unsigned long dah_len(struct morse_trig_data *morse_data)
{
return 3*morse_data->delay;
return MORSE_DAH_LEN*morse_data->delay;
}
static inline unsigned long space_len(struct morse_trig_data *morse_data)
{
return 7*morse_data->delay;
return MORSE_SPACE_LEN*morse_data->delay;
}
static void morse_timer_function(unsigned long data)
@ -88,17 +97,17 @@ static void morse_timer_function(unsigned long data)
goto set_led;
switch (morse_data->state) {
case 0:
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 = 1;
morse_data->state = MORSE_STATE_BLINK_STOP;
morse_data->morse >>= 1;
break;
case 1:
case MORSE_STATE_BLINK_STOP:
/* Coming off of a blink. */
morse_data->state = 0;
morse_data->state = MORSE_STATE_BLINK_START;
if (morse_data->morse > 1) {
/* Not done yet, just a one-dit pause. */
@ -122,7 +131,8 @@ static void morse_timer_function(unsigned long data)
if (!(morse_data->morse = tomorse(*morse_data->msgpos))) {
delay = space_len(morse_data);
morse_data->state = 1; /* And get us back here */
/* And get us back here */
morse_data->state = MORSE_STATE_BLINK_STOP;
}
morse_data->msgpos++;
break;
@ -193,12 +203,12 @@ static ssize_t morse_msg_store(struct class_device *dev, const char *buf,
memcpy(m,buf,size);
m[size]='\0';
if (!morse_data->msg)
if (morse_data->msg)
kfree(morse_data->msg);
morse_data->msg = m;
morse_data->msgpos = NULL;
morse_data->state = 1;
morse_data->state = MORSE_STATE_BLINK_STOP;
mod_timer(&morse_data->timer, jiffies + 1);
@ -217,12 +227,10 @@ static void morse_trig_activate(struct led_classdev *led_cdev)
if (!morse_data)
return;
led_cdev->trigger_data = morse_data;
morse_data->delay = (HZ/2);
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;
morse_data->timer.data = (unsigned long)led_cdev;
rc = class_device_create_file(led_cdev->class_dev,
&class_device_attr_delay);
@ -232,13 +240,14 @@ static void morse_trig_activate(struct led_classdev *led_cdev)
&class_device_attr_message);
if (rc) goto err_delay;
led_cdev->trigger_data = morse_data;
return;
err_delay:
class_device_remove_file(led_cdev->class_dev,
&class_device_attr_delay);
err:
led_cdev->trigger_data = NULL;
kfree(morse_data);
}
@ -255,15 +264,16 @@ static void morse_trig_deactivate(struct led_classdev *led_cdev)
&class_device_attr_delay);
del_timer_sync(&morse_data->timer);
if (!morse_data->msg)
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,
.name = "morse",
.activate = morse_trig_activate,
.deactivate = morse_trig_deactivate,
};
static int __init morse_trig_init(void)
@ -279,6 +289,6 @@ static void __exit morse_trig_exit(void)
module_init(morse_trig_init);
module_exit(morse_trig_exit);
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
MODULE_DESCRIPTION("Morse LED trigger");
MODULE_LICENSE("GPL");