1 files changed, 470 insertions, 0 deletions

diff --git a/recipes-kernel/linux/linux-3.12.70/linux-3.12-ledtrig-netdev.patch b/recipes-kernel/linux/linux-3.12.70/linux-3.12-ledtrig-netdev.patch
new file mode 100644
index 0000000..ec5f114
--- /dev/null
+++ b/recipes-kernel/linux/linux-3.12.70/linux-3.12-ledtrig-netdev.patch
@@ -0,0 +1,470 @@
+diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
+index 49794b4..c049f00 100644
+--- a/drivers/leds/trigger/Kconfig
++++ b/drivers/leds/trigger/Kconfig
+@@ -108,4 +108,12 @@ config LEDS_TRIGGER_CAMERA
+ 	  This enables direct flash/torch on/off by the driver, kernel space.
+ 	  If unsure, say Y.
+ 
++config LEDS_TRIGGER_NETDEV
++	tristate "LED Netdev Trigger"
++	depends on NET
++	depends on LEDS_TRIGGERS
++	help
++	  This allows LEDs to be controlled by network device activity.
++	  If unsure, say Y.
++
+ endif # LEDS_TRIGGERS
+diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
+index 1abf48d..17c9937 100644
+--- a/drivers/leds/trigger/Makefile
++++ b/drivers/leds/trigger/Makefile
+@@ -8,3 +8,4 @@ obj-$(CONFIG_LEDS_TRIGGER_CPU)		+= ledtrig-cpu.o
+ obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON)	+= ledtrig-default-on.o
+ obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT)	+= ledtrig-transient.o
+ obj-$(CONFIG_LEDS_TRIGGER_CAMERA)	+= ledtrig-camera.o
++obj-$(CONFIG_LEDS_TRIGGER_NETDEV)	+= ledtrig-netdev.o
+diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/linux-3.12.27.mtr/drivers/leds/trigger/ledtrig-netdev.c
+new file mode 100644
+index 0000000..2150440
+--- /dev/null
++++ b/drivers/leds/trigger/ledtrig-netdev.c
+@@ -0,0 +1,438 @@
++/*
++ * LED Kernel Netdev Trigger
++ *
++ * Toggles the LED to reflect the link and traffic state of a named net device
++ *
++ * Copyright 2007 Oliver Jowett <oliver@opencloud.com>
++ *
++ * Derived from ledtrig-timer.c which is:
++ *  Copyright 2005-2006 Openedhand Ltd.
++ *  Author: Richard Purdie <rpurdie@openedhand.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/module.h>
++#include <linux/jiffies.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/list.h>
++#include <linux/spinlock.h>
++#include <linux/device.h>
++#include <linux/netdevice.h>
++#include <linux/timer.h>
++#include <linux/ctype.h>
++#include <linux/leds.h>
++
++#include "../leds.h"
++
++/*
++ * Configurable sysfs attributes:
++ *
++ * device_name - network device name to monitor
++ *
++ * interval - duration of LED blink, in milliseconds
++ *
++ * mode - either "none" (LED is off) or a space separated list of one or more of:
++ *   link: LED's normal state reflects whether the link is up (has carrier) or not
++ *   tx:   LED blinks on transmitted data
++ *   rx:   LED blinks on receive data
++ *
++ * Some suggestions:
++ *
++ *  Simple link status LED:
++ *  $ echo netdev >someled/trigger
++ *  $ echo eth0 >someled/device_name
++ *  $ echo link >someled/mode
++ *
++ *  Ethernet-style link/activity LED:
++ *  $ echo netdev >someled/trigger
++ *  $ echo eth0 >someled/device_name
++ *  $ echo "link tx rx" >someled/mode
++ *
++ *  Modem-style tx/rx LEDs:
++ *  $ echo netdev >led1/trigger
++ *  $ echo ppp0 >led1/device_name
++ *  $ echo tx >led1/mode
++ *  $ echo netdev >led2/trigger
++ *  $ echo ppp0 >led2/device_name
++ *  $ echo rx >led2/mode
++ *
++ */
++
++#define MODE_LINK 1
++#define MODE_TX   2
++#define MODE_RX   4
++
++struct led_netdev_data {
++	rwlock_t lock;
++
++	struct timer_list timer;
++	struct notifier_block notifier;
++
++	struct led_classdev *led_cdev;
++	struct net_device *net_dev;
++
++	char device_name[IFNAMSIZ];
++	unsigned interval;
++	unsigned mode;
++	unsigned link_up;
++	unsigned last_activity;
++};
++
++static void set_baseline_state(struct led_netdev_data *trigger_data)
++{
++	if ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up)
++		led_set_brightness(trigger_data->led_cdev, LED_FULL);
++	else
++		led_set_brightness(trigger_data->led_cdev, LED_OFF);
++
++	if ((trigger_data->mode & (MODE_TX | MODE_RX)) != 0 && trigger_data->link_up)
++		mod_timer(&trigger_data->timer, jiffies + trigger_data->interval);
++	else
++		del_timer(&trigger_data->timer);
++}
++
++static ssize_t led_device_name_show(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	read_lock(&trigger_data->lock);
++	sprintf(buf, "%s\n", trigger_data->device_name);
++	read_unlock(&trigger_data->lock);
++
++	return strlen(buf) + 1;
++}
++
++static ssize_t led_device_name_store(struct device *dev,
++		struct device_attribute *attr, const char *buf, size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	if (size < 0 || size >= IFNAMSIZ)
++		return -EINVAL;
++
++	write_lock(&trigger_data->lock);
++
++	strcpy(trigger_data->device_name, buf);
++	if (size > 0 && trigger_data->device_name[size-1] == '\n')
++		trigger_data->device_name[size-1] = 0;
++
++	if (trigger_data->device_name[0] != 0) {
++		/* check for existing device to update from */
++		trigger_data->net_dev = dev_get_by_name(&init_net, trigger_data->device_name);
++		if (trigger_data->net_dev != NULL)
++			trigger_data->link_up = (dev_get_flags(trigger_data->net_dev) & IFF_LOWER_UP) != 0;
++		set_baseline_state(trigger_data); /* updates LEDs, may start timers */
++	}
++
++	write_unlock(&trigger_data->lock);
++	return size;
++}
++
++static DEVICE_ATTR(device_name, 0644, led_device_name_show, led_device_name_store);
++
++static ssize_t led_mode_show(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	read_lock(&trigger_data->lock);
++
++	if (trigger_data->mode == 0) {
++		strcpy(buf, "none\n");
++	} else {
++		if (trigger_data->mode & MODE_LINK)
++			strcat(buf, "link ");
++		if (trigger_data->mode & MODE_TX)
++			strcat(buf, "tx ");
++		if (trigger_data->mode & MODE_RX)
++			strcat(buf, "rx ");
++		strcat(buf, "\n");
++	}
++
++	read_unlock(&trigger_data->lock);
++
++	return strlen(buf)+1;
++}
++
++static ssize_t led_mode_store(struct device *dev,
++		struct device_attribute *attr, const char *buf, size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	char copybuf[128];
++	int new_mode = -1;
++	char *p, *token;
++
++	/* take a copy since we don't want to trash the inbound buffer when using strsep */
++	strncpy(copybuf, buf, sizeof(copybuf));
++	copybuf[sizeof(copybuf) - 1] = 0;
++	p = copybuf;
++
++	while ((token = strsep(&p, " \t\n")) != NULL) {
++		if (!*token)
++			continue;
++
++		if (new_mode == -1)
++			new_mode = 0;
++
++		if (!strcmp(token, "none"))
++			new_mode = 0;
++		else if (!strcmp(token, "tx"))
++			new_mode |= MODE_TX;
++		else if (!strcmp(token, "rx"))
++			new_mode |= MODE_RX;
++		else if (!strcmp(token, "link"))
++			new_mode |= MODE_LINK;
++		else
++			return -EINVAL;
++	}
++
++	if (new_mode == -1)
++		return -EINVAL;
++
++	write_lock(&trigger_data->lock);
++	trigger_data->mode = new_mode;
++	set_baseline_state(trigger_data);
++	write_unlock(&trigger_data->lock);
++
++	return size;
++}
++
++static DEVICE_ATTR(mode, 0644, led_mode_show, led_mode_store);
++
++static ssize_t led_interval_show(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	read_lock(&trigger_data->lock);
++	sprintf(buf, "%u\n", jiffies_to_msecs(trigger_data->interval));
++	read_unlock(&trigger_data->lock);
++
++	return strlen(buf) + 1;
++}
++
++static ssize_t led_interval_store(struct device *dev,
++		struct device_attribute *attr, const char *buf, size_t size)
++{
++	struct led_classdev *led_cdev = dev_get_drvdata(dev);
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++	int ret = -EINVAL;
++	char *after;
++	unsigned long value = simple_strtoul(buf, &after, 10);
++	size_t count = after - buf;
++
++	if (isspace(*after))
++		count++;
++
++	/* impose some basic bounds on the timer interval */
++	if (count == size && value >= 5 && value <= 10000) {
++		write_lock(&trigger_data->lock);
++		trigger_data->interval = msecs_to_jiffies(value);
++		set_baseline_state(trigger_data); /* resets timer */
++		write_unlock(&trigger_data->lock);
++		ret = count;
++	}
++
++	return ret;
++}
++
++static DEVICE_ATTR(interval, 0644, led_interval_show, led_interval_store);
++
++static int netdev_trig_notify(struct notifier_block *nb,
++			      unsigned long evt,
++			      void *dv)
++{
++	struct net_device *dev = netdev_notifier_info_to_dev((struct netdev_notifier_info *) dv);
++	struct led_netdev_data *trigger_data = container_of(nb, struct led_netdev_data, notifier);
++
++	if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER)
++		return NOTIFY_DONE;
++
++	write_lock(&trigger_data->lock);
++
++	if (strcmp(dev->name, trigger_data->device_name))
++		goto done;
++
++	if (evt == NETDEV_REGISTER) {
++		if (trigger_data->net_dev != NULL)
++			dev_put(trigger_data->net_dev);
++		dev_hold(dev);
++		trigger_data->net_dev = dev;
++		trigger_data->link_up = 0;
++		goto done;
++	}
++
++	if (evt == NETDEV_UNREGISTER && trigger_data->net_dev != NULL) {
++		dev_put(trigger_data->net_dev);
++		trigger_data->net_dev = NULL;
++		goto done;
++	}
++
++	/* UP / DOWN / CHANGE */
++
++	trigger_data->link_up = (evt != NETDEV_DOWN && netif_carrier_ok(dev));
++	set_baseline_state(trigger_data);
++
++done:
++	write_unlock(&trigger_data->lock);
++	return NOTIFY_DONE;
++}
++
++/* here's the real work! */
++static void netdev_trig_timer(unsigned long arg)
++{
++	struct led_netdev_data *trigger_data = (struct led_netdev_data *)arg;
++	struct rtnl_link_stats64 *dev_stats;
++	unsigned new_activity;
++	struct rtnl_link_stats64 temp;
++
++	write_lock(&trigger_data->lock);
++
++	if (!trigger_data->link_up || !trigger_data->net_dev || (trigger_data->mode & (MODE_TX | MODE_RX)) == 0) {
++		/* we don't need to do timer work, just reflect link state. */
++		led_set_brightness(trigger_data->led_cdev, ((trigger_data->mode & MODE_LINK) != 0 && trigger_data->link_up) ? LED_FULL : LED_OFF);
++		goto no_restart;
++	}
++
++	dev_stats = dev_get_stats(trigger_data->net_dev, &temp);
++	new_activity =
++		((trigger_data->mode & MODE_TX) ? dev_stats->tx_packets : 0) +
++		((trigger_data->mode & MODE_RX) ? dev_stats->rx_packets : 0);
++
++	if (trigger_data->mode & MODE_LINK) {
++		/* base state is ON (link present) */
++		/* if there's no link, we don't get this far and the LED is off */
++
++		/* OFF -> ON always */
++		/* ON -> OFF on activity */
++		if (trigger_data->led_cdev->brightness == LED_OFF) {
++			led_set_brightness(trigger_data->led_cdev, LED_FULL);
++		} else if (trigger_data->last_activity != new_activity) {
++			led_set_brightness(trigger_data->led_cdev, LED_OFF);
++		}
++	} else {
++		/* base state is OFF */
++		/* ON -> OFF always */
++		/* OFF -> ON on activity */
++		if (trigger_data->led_cdev->brightness == LED_FULL) {
++			led_set_brightness(trigger_data->led_cdev, LED_OFF);
++		} else if (trigger_data->last_activity != new_activity) {
++			led_set_brightness(trigger_data->led_cdev, LED_FULL);
++		}
++	}
++
++	trigger_data->last_activity = new_activity;
++	mod_timer(&trigger_data->timer, jiffies + trigger_data->interval);
++
++no_restart:
++	write_unlock(&trigger_data->lock);
++}
++
++static void netdev_trig_activate(struct led_classdev *led_cdev)
++{
++	struct led_netdev_data *trigger_data;
++	int rc;
++
++	trigger_data = kzalloc(sizeof(struct led_netdev_data), GFP_KERNEL);
++	if (!trigger_data)
++		return;
++
++	rwlock_init(&trigger_data->lock);
++
++	trigger_data->notifier.notifier_call = netdev_trig_notify;
++	trigger_data->notifier.priority = 10;
++
++	setup_timer(&trigger_data->timer, netdev_trig_timer, (unsigned long) trigger_data);
++
++	trigger_data->led_cdev = led_cdev;
++	trigger_data->net_dev = NULL;
++	trigger_data->device_name[0] = 0;
++
++	trigger_data->mode = 0;
++	trigger_data->interval = msecs_to_jiffies(50);
++	trigger_data->link_up = 0;
++	trigger_data->last_activity = 0;
++
++	led_cdev->trigger_data = trigger_data;
++
++	rc = device_create_file(led_cdev->dev, &dev_attr_device_name);
++	if (rc)
++		goto err_out;
++	rc = device_create_file(led_cdev->dev, &dev_attr_mode);
++	if (rc)
++		goto err_out_device_name;
++	rc = device_create_file(led_cdev->dev, &dev_attr_interval);
++	if (rc)
++		goto err_out_mode;
++
++	register_netdevice_notifier(&trigger_data->notifier);
++	return;
++
++err_out_mode:
++	device_remove_file(led_cdev->dev, &dev_attr_mode);
++err_out_device_name:
++	device_remove_file(led_cdev->dev, &dev_attr_device_name);
++err_out:
++	led_cdev->trigger_data = NULL;
++	kfree(trigger_data);
++}
++
++static void netdev_trig_deactivate(struct led_classdev *led_cdev)
++{
++	struct led_netdev_data *trigger_data = led_cdev->trigger_data;
++
++	if (trigger_data) {
++		unregister_netdevice_notifier(&trigger_data->notifier);
++
++		device_remove_file(led_cdev->dev, &dev_attr_device_name);
++		device_remove_file(led_cdev->dev, &dev_attr_mode);
++		device_remove_file(led_cdev->dev, &dev_attr_interval);
++
++		write_lock(&trigger_data->lock);
++
++		if (trigger_data->net_dev) {
++			dev_put(trigger_data->net_dev);
++			trigger_data->net_dev = NULL;
++		}
++
++		write_unlock(&trigger_data->lock);
++
++		del_timer_sync(&trigger_data->timer);
++
++		kfree(trigger_data);
++	}
++}
++
++static struct led_trigger netdev_led_trigger = {
++	.name     = "netdev",
++	.activate = netdev_trig_activate,
++	.deactivate = netdev_trig_deactivate,
++};
++
++static int __init netdev_trig_init(void)
++{
++	return led_trigger_register(&netdev_led_trigger);
++}
++
++static void __exit netdev_trig_exit(void)
++{
++	led_trigger_unregister(&netdev_led_trigger);
++}
++
++module_init(netdev_trig_init);
++module_exit(netdev_trig_exit);
++
++MODULE_AUTHOR("Oliver Jowett <oliver@opencloud.com>");
++MODULE_DESCRIPTION("Netdev LED trigger");
++MODULE_LICENSE("GPL");