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add missing file from [9055]
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9056 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
parent
838cafeae2
commit
b7a77f6732
294
target/linux/generic-2.6/files/drivers/leds/ledtrig-morse.c
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294
target/linux/generic-2.6/files/drivers/leds/ledtrig-morse.c
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@ -0,0 +1,294 @@
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/*
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* LED Morse Trigger
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*
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* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
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*
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* This file was based on: drivers/led/ledtrig-timer.c
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* Copyright 2005-2006 Openedhand Ltd.
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* Author: Richard Purdie <rpurdie@openedhand.com>
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*
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* also based on the patch '[PATCH] 2.5.59 morse code panics' posted
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* in the LKML by Tomas Szepe at Thu, 30 Jan 2003
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* Copyright (C) 2002 Andrew Rodland <arodland@noln.com>
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* Copyright (C) 2003 Tomas Szepe <szepe@pinerecords.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/device.h>
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#include <linux/sysdev.h>
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#include <linux/timer.h>
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#include <linux/ctype.h>
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#include <linux/leds.h>
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#include "leds.h"
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#define MORSE_DELAY_BASE (HZ/2)
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#define MORSE_STATE_BLINK_START 0
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#define MORSE_STATE_BLINK_STOP 1
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#define MORSE_DIT_LEN 1
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#define MORSE_DAH_LEN 3
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#define MORSE_SPACE_LEN 7
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struct morse_trig_data {
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unsigned long delay;
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char *msg;
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unsigned char morse;
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unsigned char state;
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char *msgpos;
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struct timer_list timer;
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};
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const unsigned char morsetable[] = {
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0122, 0, 0310, 0, 0, 0163, /* "#$%&' */
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055, 0155, 0, 0, 0163, 0141, 0152, 0051, /* ()*+,-./ */
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077, 076, 074, 070, 060, 040, 041, 043, 047, 057, /* 0-9 */
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0107, 0125, 0, 0061, 0, 0114, 0, /* :;<=>?@ */
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006, 021, 025, 011, 002, 024, 013, 020, 004, /* A-I */
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036, 015, 022, 007, 005, 017, 026, 033, 012, /* J-R */
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010, 003, 014, 030, 016, 031, 035, 023, /* S-Z */
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0, 0, 0, 0, 0154 /* [\]^_ */
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};
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static inline unsigned char tomorse(char c) {
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if (c >= 'a' && c <= 'z')
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c = c - 'a' + 'A';
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if (c >= '"' && c <= '_') {
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return morsetable[c - '"'];
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} else
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return 0;
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}
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static inline unsigned long dit_len(struct morse_trig_data *morse_data)
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{
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return MORSE_DIT_LEN*morse_data->delay;
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}
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static inline unsigned long dah_len(struct morse_trig_data *morse_data)
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{
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return MORSE_DAH_LEN*morse_data->delay;
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}
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static inline unsigned long space_len(struct morse_trig_data *morse_data)
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{
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return MORSE_SPACE_LEN*morse_data->delay;
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}
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static void morse_timer_function(unsigned long data)
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{
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struct led_classdev *led_cdev = (struct led_classdev *) data;
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struct morse_trig_data *morse_data = led_cdev->trigger_data;
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unsigned long brightness = LED_OFF;
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unsigned long delay = 0;
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if (!morse_data->msg)
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goto set_led;
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switch (morse_data->state) {
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case MORSE_STATE_BLINK_START:
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/* Starting a new blink. We have a valid code in morse. */
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delay = (morse_data->morse & 001) ? dah_len(morse_data):
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dit_len(morse_data);
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brightness = LED_FULL;
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morse_data->state = MORSE_STATE_BLINK_STOP;
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morse_data->morse >>= 1;
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break;
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case MORSE_STATE_BLINK_STOP:
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/* Coming off of a blink. */
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morse_data->state = MORSE_STATE_BLINK_START;
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if (morse_data->morse > 1) {
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/* Not done yet, just a one-dit pause. */
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delay = dit_len(morse_data);
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break;
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}
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/* Get a new char, figure out how much space. */
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/* First time through */
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if (!morse_data->msgpos)
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morse_data->msgpos = (char *)morse_data->msg;
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if (!*morse_data->msgpos) {
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/* Repeating */
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morse_data->msgpos = (char *)morse_data->msg;
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delay = space_len(morse_data);
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} else {
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/* Inter-letter space */
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delay = dah_len(morse_data);
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}
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if (!(morse_data->morse = tomorse(*morse_data->msgpos))) {
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delay = space_len(morse_data);
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/* And get us back here */
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morse_data->state = MORSE_STATE_BLINK_STOP;
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}
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morse_data->msgpos++;
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break;
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}
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mod_timer(&morse_data->timer, jiffies + msecs_to_jiffies(delay));
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set_led:
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led_set_brightness(led_cdev, brightness);
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}
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static ssize_t morse_delay_show(struct class_device *dev, char *buf)
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{
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struct led_classdev *led_cdev = class_get_devdata(dev);
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struct morse_trig_data *morse_data = led_cdev->trigger_data;
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sprintf(buf, "%lu\n", morse_data->delay);
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return strlen(buf) + 1;
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}
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static ssize_t morse_delay_store(struct class_device *dev, const char *buf,
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size_t size)
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{
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struct led_classdev *led_cdev = class_get_devdata(dev);
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struct morse_trig_data *morse_data = led_cdev->trigger_data;
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char *after;
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unsigned long state = simple_strtoul(buf, &after, 10);
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size_t count = after - buf;
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int ret = -EINVAL;
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if (*after && isspace(*after))
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count++;
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if (count == size) {
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morse_data->delay = state;
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mod_timer(&morse_data->timer, jiffies + 1);
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ret = count;
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}
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return ret;
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}
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static ssize_t morse_msg_show(struct class_device *dev, char *buf)
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{
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struct led_classdev *led_cdev = class_get_devdata(dev);
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struct morse_trig_data *morse_data = led_cdev->trigger_data;
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if (!morse_data->msg)
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sprintf(buf, "<none>\n");
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else
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sprintf(buf, "%s\n", morse_data->msg);
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return strlen(buf) + 1;
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}
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static ssize_t morse_msg_store(struct class_device *dev, const char *buf,
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size_t size)
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{
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struct led_classdev *led_cdev = class_get_devdata(dev);
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struct morse_trig_data *morse_data = led_cdev->trigger_data;
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char *m;
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m = kmalloc(size, GFP_KERNEL);
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if (!m)
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return -ENOMEM;
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memcpy(m,buf,size);
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m[size]='\0';
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if (morse_data->msg)
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kfree(morse_data->msg);
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morse_data->msg = m;
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morse_data->msgpos = NULL;
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morse_data->state = MORSE_STATE_BLINK_STOP;
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mod_timer(&morse_data->timer, jiffies + 1);
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return size;
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}
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static CLASS_DEVICE_ATTR(delay, 0644, morse_delay_show, morse_delay_store);
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static CLASS_DEVICE_ATTR(message, 0644, morse_msg_show, morse_msg_store);
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static void morse_trig_activate(struct led_classdev *led_cdev)
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{
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struct morse_trig_data *morse_data;
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int rc;
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morse_data = kzalloc(sizeof(*morse_data), GFP_KERNEL);
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if (!morse_data)
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return;
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morse_data->delay = MORSE_DELAY_BASE;
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init_timer(&morse_data->timer);
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morse_data->timer.function = morse_timer_function;
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morse_data->timer.data = (unsigned long)led_cdev;
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rc = class_device_create_file(led_cdev->class_dev,
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&class_device_attr_delay);
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if (rc) goto err;
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rc = class_device_create_file(led_cdev->class_dev,
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&class_device_attr_message);
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if (rc) goto err_delay;
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led_cdev->trigger_data = morse_data;
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return;
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err_delay:
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class_device_remove_file(led_cdev->class_dev,
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&class_device_attr_delay);
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err:
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kfree(morse_data);
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}
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static void morse_trig_deactivate(struct led_classdev *led_cdev)
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{
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struct morse_trig_data *morse_data = led_cdev->trigger_data;
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if (!morse_data)
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return;
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class_device_remove_file(led_cdev->class_dev,
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&class_device_attr_message);
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class_device_remove_file(led_cdev->class_dev,
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&class_device_attr_delay);
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del_timer_sync(&morse_data->timer);
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if (morse_data->msg)
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kfree(morse_data->msg);
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kfree(morse_data);
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}
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static struct led_trigger morse_led_trigger = {
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.name = "morse",
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.activate = morse_trig_activate,
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.deactivate = morse_trig_deactivate,
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};
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static int __init morse_trig_init(void)
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{
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return led_trigger_register(&morse_led_trigger);
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}
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static void __exit morse_trig_exit(void)
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{
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led_trigger_unregister(&morse_led_trigger);
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}
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module_init(morse_trig_init);
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module_exit(morse_trig_exit);
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MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
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MODULE_DESCRIPTION("Morse LED trigger");
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MODULE_LICENSE("GPL");
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