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