150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
/*
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* LED ADM5120 Switch Port State Trigger
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*
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* Copyright (C) 2007 Bernhard Held <bernhard at bernhardheld.de>
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This file was based on: drivers/leds/ledtrig-timer.c
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* Copyright 2005-2006 Openedhand Ltd.
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* Author: Richard Purdie
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/gpio.h>
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#include "leds.h"
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#define DRV_NAME "port_state"
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#define DRV_DESC "LED ADM5120 Switch Port State Trigger"
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struct port_state {
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char *name;
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unsigned int value;
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};
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#define PORT_STATE(n, v) {.name = (n), .value = (v)}
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static struct port_state port_states[] = {
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PORT_STATE("off", LED_OFF),
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PORT_STATE("on", LED_FULL),
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PORT_STATE("flash", ADM5120_GPIO_FLASH),
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PORT_STATE("link", ADM5120_GPIO_LINK),
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PORT_STATE("speed", ADM5120_GPIO_SPEED),
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PORT_STATE("duplex", ADM5120_GPIO_DUPLEX),
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PORT_STATE("act", ADM5120_GPIO_ACT),
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PORT_STATE("coll", ADM5120_GPIO_COLL),
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PORT_STATE("link_act", ADM5120_GPIO_LINK_ACT),
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PORT_STATE("duplex_coll", ADM5120_GPIO_DUPLEX_COLL),
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PORT_STATE("10M_act", ADM5120_GPIO_10M_ACT),
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PORT_STATE("100M_act", ADM5120_GPIO_100M_ACT),
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};
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static ssize_t led_port_state_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct led_classdev *led_cdev = dev_get_drvdata(dev);
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struct port_state *state = led_cdev->trigger_data;
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int len = 0;
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int i;
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*buf = '\0';
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for (i = 0; i < ARRAY_SIZE(port_states); i++) {
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if (&port_states[i] == state)
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len += sprintf(buf+len, "[%s] ", port_states[i].name);
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else
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len += sprintf(buf+len, "%s ", port_states[i].name);
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}
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len += sprintf(buf+len, "\n");
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return len;
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}
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static ssize_t led_port_state_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t size)
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{
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struct led_classdev *led_cdev = dev_get_drvdata(dev);
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size_t len;
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int i;
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for (i = 0; i < ARRAY_SIZE(port_states); i++) {
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len = strlen(port_states[i].name);
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if (strncmp(port_states[i].name, buf, len) != 0)
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continue;
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if (buf[len] != '\0' && buf[len] != '\n')
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continue;
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led_cdev->trigger_data = &port_states[i];
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led_set_brightness(led_cdev, port_states[i].value);
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return size;
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}
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return -EINVAL;
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}
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static DEVICE_ATTR(port_state, 0644, led_port_state_show,
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led_port_state_store);
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static void adm5120_switch_trig_activate(struct led_classdev *led_cdev)
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{
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struct port_state *state = port_states;
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int rc;
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led_cdev->trigger_data = state;
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rc = device_create_file(led_cdev->dev, &dev_attr_port_state);
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if (rc)
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goto err;
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led_set_brightness(led_cdev, state->value);
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return;
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err:
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led_cdev->trigger_data = NULL;
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}
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static void adm5120_switch_trig_deactivate(struct led_classdev *led_cdev)
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{
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struct port_state *state = led_cdev->trigger_data;
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if (!state)
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return;
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device_remove_file(led_cdev->dev, &dev_attr_port_state);
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}
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static struct led_trigger adm5120_switch_led_trigger = {
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.name = DRV_NAME,
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.activate = adm5120_switch_trig_activate,
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.deactivate = adm5120_switch_trig_deactivate,
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};
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static int __init adm5120_switch_trig_init(void)
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{
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led_trigger_register(&adm5120_switch_led_trigger);
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return 0;
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}
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static void __exit adm5120_switch_trig_exit(void)
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{
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led_trigger_unregister(&adm5120_switch_led_trigger);
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}
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module_init(adm5120_switch_trig_init);
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module_exit(adm5120_switch_trig_exit);
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MODULE_AUTHOR("Bernhard Held <bernhard at bernhardheld.de>, "
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"Gabor Juhos <juhosg@openwrt.org>");
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MODULE_DESCRIPTION(DRV_DESC);
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MODULE_LICENSE("GPL v2");
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