diff options
| -rw-r--r-- | target/linux/adm5120/files/drivers/leds/ledtrig-morse.c | 50 |
1 files changed, 30 insertions, 20 deletions
diff --git a/target/linux/adm5120/files/drivers/leds/ledtrig-morse.c b/target/linux/adm5120/files/drivers/leds/ledtrig-morse.c index 1f215bc27..13998ea10 100644 --- a/target/linux/adm5120/files/drivers/leds/ledtrig-morse.c +++ b/target/linux/adm5120/files/drivers/leds/ledtrig-morse.c @@ -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"); |