diff options
Diffstat (limited to 'target/linux/adm5120/files/drivers/leds')
| -rw-r--r-- | target/linux/adm5120/files/drivers/leds/ledtrig-adm5120-switch.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/target/linux/adm5120/files/drivers/leds/ledtrig-adm5120-switch.c b/target/linux/adm5120/files/drivers/leds/ledtrig-adm5120-switch.c new file mode 100644 index 000000000..b4a5dbbea --- /dev/null +++ b/target/linux/adm5120/files/drivers/leds/ledtrig-adm5120-switch.c @@ -0,0 +1,149 @@ +/* + * 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"); |