diff options
Diffstat (limited to 'target/linux/generic/files/drivers/leds/ledtrig-morse.c')
| -rw-r--r-- | target/linux/generic/files/drivers/leds/ledtrig-morse.c | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/target/linux/generic/files/drivers/leds/ledtrig-morse.c b/target/linux/generic/files/drivers/leds/ledtrig-morse.c deleted file mode 100644 index bc58afe4c6..0000000000 --- a/target/linux/generic/files/drivers/leds/ledtrig-morse.c +++ /dev/null @@ -1,366 +0,0 @@ -/* - * 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 <linux/slab.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"); |