diff options
Diffstat (limited to 'target/linux/generic/files/drivers/leds')
3 files changed, 1152 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/leds/ledtrig-morse.c b/target/linux/generic/files/drivers/leds/ledtrig-morse.c new file mode 100644 index 0000000..bc58afe --- /dev/null +++ b/target/linux/generic/files/drivers/leds/ledtrig-morse.c @@ -0,0 +1,366 @@ +/* + * LED Morse Trigger + * + * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org> + * + * This file was based on: drivers/led/ledtrig-timer.c + * Copyright 2005-2006 Openedhand Ltd. + * Author: Richard Purdie <rpurdie@openedhand.com> + * + * also based on the patch '[PATCH] 2.5.59 morse code panics' posted + * in the LKML by Tomas Szepe at Thu, 30 Jan 2003 + * Copyright (C) 2002 Andrew Rodland <arodland@noln.com> + * Copyright (C) 2003 Tomas Szepe <szepe@pinerecords.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/kernel.h> +#include <linux/version.h> +#include <linux/module.h> +#include <linux/jiffies.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/spinlock.h> +#include <linux/device.h> +#include <linux/sysdev.h> +#include <linux/timer.h> +#include <linux/ctype.h> +#include <linux/leds.h> +#include <linux/slab.h> + +#include "leds.h" + +#define MORSE_DELAY_BASE (HZ/2) + +#define MORSE_STATE_BLINK_START 0 +#define MORSE_STATE_BLINK_STOP 1 + +#define MORSE_DIT_LEN 1 +#define MORSE_DAH_LEN 3 +#define MORSE_SPACE_LEN 7 + +struct morse_trig_data { + unsigned long delay; + char *msg; + + unsigned char morse; + unsigned char state; + char *msgpos; + struct timer_list timer; +}; + +const unsigned char morsetable[] = { + 0122, 0, 0310, 0, 0, 0163, /* "#$%&' */ + 055, 0155, 0, 0, 0163, 0141, 0152, 0051, /* ()*+,-./ */ + 077, 076, 074, 070, 060, 040, 041, 043, 047, 057, /* 0-9 */ + 0107, 0125, 0, 0061, 0, 0114, 0, /* :;<=>?@ */ + 006, 021, 025, 011, 002, 024, 013, 020, 004, /* A-I */ + 036, 015, 022, 007, 005, 017, 026, 033, 012, /* J-R */ + 010, 003, 014, 030, 016, 031, 035, 023, /* S-Z */ + 0, 0, 0, 0, 0154 /* [\]^_ */ +}; + +static inline unsigned char tomorse(char c) { + if (c >= 'a' && c <= 'z') + c = c - 'a' + 'A'; + if (c >= '"' && c <= '_') { + return morsetable[c - '"']; + } else + return 0; +} + +static inline unsigned long dit_len(struct morse_trig_data *morse_data) +{ + return MORSE_DIT_LEN*morse_data->delay; +} + +static inline unsigned long dah_len(struct morse_trig_data *morse_data) +{ + return MORSE_DAH_LEN*morse_data->delay; +} + +static inline unsigned long space_len(struct morse_trig_data *morse_data) +{ + return MORSE_SPACE_LEN*morse_data->delay; +} + +static void morse_timer_function(unsigned long data) +{ + struct led_classdev *led_cdev = (struct led_classdev *)data; + struct morse_trig_data *morse_data = led_cdev->trigger_data; + unsigned long brightness = LED_OFF; + unsigned long delay = 0; + + if (!morse_data->msg) + goto set_led; + + switch (morse_data->state) { + case MORSE_STATE_BLINK_START: + /* Starting a new blink. We have a valid code in morse. */ + delay = (morse_data->morse & 001) ? dah_len(morse_data): + dit_len(morse_data); + brightness = LED_FULL; + morse_data->state = MORSE_STATE_BLINK_STOP; + morse_data->morse >>= 1; + break; + case MORSE_STATE_BLINK_STOP: + /* Coming off of a blink. */ + morse_data->state = MORSE_STATE_BLINK_START; + + if (morse_data->morse > 1) { + /* Not done yet, just a one-dit pause. */ + delay = dit_len(morse_data); + break; + } + + /* Get a new char, figure out how much space. */ + /* First time through */ + if (!morse_data->msgpos) + morse_data->msgpos = (char *)morse_data->msg; + + if (!*morse_data->msgpos) { + /* Repeating */ + morse_data->msgpos = (char *)morse_data->msg; + delay = space_len(morse_data); + } else { + /* Inter-letter space */ + delay = dah_len(morse_data); + } + + if (!(morse_data->morse = tomorse(*morse_data->msgpos))) { + delay = space_len(morse_data); + /* And get us back here */ + morse_data->state = MORSE_STATE_BLINK_STOP; + } + morse_data->msgpos++; + break; + } + + mod_timer(&morse_data->timer, jiffies + msecs_to_jiffies(delay)); + +set_led: + led_set_brightness(led_cdev, brightness); +} + +static ssize_t _morse_delay_show(struct led_classdev *led_cdev, char *buf) +{ + struct morse_trig_data *morse_data = led_cdev->trigger_data; + + sprintf(buf, "%lu\n", morse_data->delay); + + return strlen(buf) + 1; +} + +static ssize_t _morse_delay_store(struct led_classdev *led_cdev, + const char *buf, size_t size) +{ + struct morse_trig_data *morse_data = led_cdev->trigger_data; + char *after; + unsigned long state = simple_strtoul(buf, &after, 10); + size_t count = after - buf; + int ret = -EINVAL; + + if (*after && isspace(*after)) + count++; + + if (count == size) { + morse_data->delay = state; + mod_timer(&morse_data->timer, jiffies + 1); + ret = count; + } + + return ret; +} + +static ssize_t _morse_msg_show(struct led_classdev *led_cdev, char *buf) +{ + struct morse_trig_data *morse_data = led_cdev->trigger_data; + + if (!morse_data->msg) + sprintf(buf, "<none>\n"); + else + sprintf(buf, "%s\n", morse_data->msg); + + return strlen(buf) + 1; +} + +static ssize_t _morse_msg_store(struct led_classdev *led_cdev, + const char *buf, size_t size) +{ + struct morse_trig_data *morse_data = led_cdev->trigger_data; + char *m; + + m = kmalloc(size, GFP_KERNEL); + if (!m) + return -ENOMEM; + + memcpy(m,buf,size); + m[size]='\0'; + + if (morse_data->msg) + kfree(morse_data->msg); + + morse_data->msg = m; + morse_data->msgpos = NULL; + morse_data->state = MORSE_STATE_BLINK_STOP; + + mod_timer(&morse_data->timer, jiffies + 1); + + return size; +} + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) +static ssize_t morse_delay_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + + return _morse_delay_show(led_cdev, buf); +} + +static ssize_t morse_delay_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + + return _morse_delay_store(led_cdev, buf, size); +} + +static ssize_t morse_msg_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + + return _morse_msg_show(led_cdev, buf); +} + +static ssize_t morse_msg_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + + return _morse_msg_store(led_cdev, buf, size); +} + +static DEVICE_ATTR(delay, 0644, morse_delay_show, morse_delay_store); +static DEVICE_ATTR(message, 0644, morse_msg_show, morse_msg_store); + +#define led_device_create_file(leddev, attr) \ + device_create_file(leddev->dev, &dev_attr_ ## attr) +#define led_device_remove_file(leddev, attr) \ + device_remove_file(leddev->dev, &dev_attr_ ## attr) + +#else +static ssize_t morse_delay_show(struct class_device *dev, char *buf) +{ + struct led_classdev *led_cdev = class_get_devdata(dev); + + return _morse_delay_show(led_cdev, buf); +} + +static ssize_t morse_delay_store(struct class_device *dev, const char *buf, + size_t size) +{ + struct led_classdev *led_cdev = class_get_devdata(dev); + + return _morse_delay_store(led_cdev, buf, size); +} + +static ssize_t morse_msg_show(struct class_device *dev, char *buf) +{ + struct led_classdev *led_cdev = class_get_devdata(dev); + + return _morse_msg_show(led_cdev, buf); +} + +static ssize_t morse_msg_store(struct class_device *dev, const char *buf, + size_t size) +{ + struct led_classdev *led_cdev = class_get_devdata(dev); + + return _morse_msg_store(led_cdev, buf, size); +} + +static CLASS_DEVICE_ATTR(delay, 0644, morse_delay_show, morse_delay_store); +static CLASS_DEVICE_ATTR(message, 0644, morse_msg_show, morse_msg_store); + +#define led_device_create_file(leddev, attr) \ + class_device_create_file(leddev->class_dev, &class_device_attr_ ## attr) +#define led_device_remove_file(leddev, attr) \ + class_device_remove_file(leddev->class_dev, &class_device_attr_ ## attr) + +#endif + +static void morse_trig_activate(struct led_classdev *led_cdev) +{ + struct morse_trig_data *morse_data; + int rc; + + morse_data = kzalloc(sizeof(*morse_data), GFP_KERNEL); + if (!morse_data) + return; + + morse_data->delay = MORSE_DELAY_BASE; + init_timer(&morse_data->timer); + morse_data->timer.function = morse_timer_function; + morse_data->timer.data = (unsigned long)led_cdev; + + rc = led_device_create_file(led_cdev, delay); + if (rc) goto err; + + rc = led_device_create_file(led_cdev, message); + if (rc) goto err_delay; + + led_cdev->trigger_data = morse_data; + + return; + +err_delay: + led_device_remove_file(led_cdev, delay); +err: + kfree(morse_data); +} + +static void morse_trig_deactivate(struct led_classdev *led_cdev) +{ + struct morse_trig_data *morse_data = led_cdev->trigger_data; + + if (!morse_data) + return; + + led_device_remove_file(led_cdev, message); + led_device_remove_file(led_cdev, delay); + + del_timer_sync(&morse_data->timer); + if (morse_data->msg) + kfree(morse_data->msg); + + kfree(morse_data); +} + +static struct led_trigger morse_led_trigger = { + .name = "morse", + .activate = morse_trig_activate, + .deactivate = morse_trig_deactivate, +}; + +static int __init morse_trig_init(void) +{ + return led_trigger_register(&morse_led_trigger); +} + +static void __exit morse_trig_exit(void) +{ + led_trigger_unregister(&morse_led_trigger); +} + +module_init(morse_trig_init); +module_exit(morse_trig_exit); + +MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>"); +MODULE_DESCRIPTION("Morse LED trigger"); +MODULE_LICENSE("GPL"); diff --git a/target/linux/generic/files/drivers/leds/ledtrig-netdev.c b/target/linux/generic/files/drivers/leds/ledtrig-netdev.c new file mode 100644 index 0000000..4a20d7c --- /dev/null +++ b/target/linux/generic/files/drivers/leds/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/sysdev.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 = 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; + const struct net_device_stats *dev_stats; + unsigned new_activity; + + 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); + 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"); diff --git a/target/linux/generic/files/drivers/leds/ledtrig-usbdev.c b/target/linux/generic/files/drivers/leds/ledtrig-usbdev.c new file mode 100644 index 0000000..70b0e39 --- /dev/null +++ b/target/linux/generic/files/drivers/leds/ledtrig-usbdev.c @@ -0,0 +1,348 @@ +/* + * LED USB device Trigger + * + * Toggles the LED to reflect the presence and activity of an USB device + * Copyright (C) Gabor Juhos <juhosg@openwrt.org> + * + * derived from ledtrig-netdev.c: + * Copyright 2007 Oliver Jowett <oliver@opencloud.com> + * + * ledtrig-netdev.c derived from ledtrig-timer.c: + * 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/sysdev.h> +#include <linux/timer.h> +#include <linux/ctype.h> +#include <linux/slab.h> +#include <linux/leds.h> +#include <linux/usb.h> + +#include "leds.h" + +#define DEV_BUS_ID_SIZE 32 + +/* + * Configurable sysfs attributes: + * + * device_name - name of the USB device to monitor + * activity_interval - duration of LED blink, in milliseconds + */ + +struct usbdev_trig_data { + rwlock_t lock; + + struct timer_list timer; + struct notifier_block notifier; + + struct led_classdev *led_cdev; + struct usb_device *usb_dev; + + char device_name[DEV_BUS_ID_SIZE]; + unsigned interval; + int last_urbnum; +}; + +static void usbdev_trig_update_state(struct usbdev_trig_data *td) +{ + if (td->usb_dev) + led_set_brightness(td->led_cdev, LED_FULL); + else + led_set_brightness(td->led_cdev, LED_OFF); + + if (td->interval && td->usb_dev) + mod_timer(&td->timer, jiffies + td->interval); + else + del_timer(&td->timer); +} + +static ssize_t usbdev_trig_name_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct usbdev_trig_data *td = led_cdev->trigger_data; + + read_lock(&td->lock); + sprintf(buf, "%s\n", td->device_name); + read_unlock(&td->lock); + + return strlen(buf) + 1; +} + +static ssize_t usbdev_trig_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 usbdev_trig_data *td = led_cdev->trigger_data; + + if (size < 0 || size >= DEV_BUS_ID_SIZE) + return -EINVAL; + + write_lock(&td->lock); + + strcpy(td->device_name, buf); + if (size > 0 && td->device_name[size - 1] == '\n') + td->device_name[size - 1] = 0; + + if (td->device_name[0] != 0) { + struct usb_device *usb_dev; + + /* check for existing device to update from */ + usb_dev = usb_find_device_by_name(td->device_name); + if (usb_dev) { + if (td->usb_dev) + usb_put_dev(td->usb_dev); + + td->usb_dev = usb_dev; + td->last_urbnum = atomic_read(&usb_dev->urbnum); + } + + /* updates LEDs, may start timers */ + usbdev_trig_update_state(td); + } + + write_unlock(&td->lock); + return size; +} + +static DEVICE_ATTR(device_name, 0644, usbdev_trig_name_show, + usbdev_trig_name_store); + +static ssize_t usbdev_trig_interval_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct usbdev_trig_data *td = led_cdev->trigger_data; + + read_lock(&td->lock); + sprintf(buf, "%u\n", jiffies_to_msecs(td->interval)); + read_unlock(&td->lock); + + return strlen(buf) + 1; +} + +static ssize_t usbdev_trig_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 usbdev_trig_data *td = led_cdev->trigger_data; + int ret = -EINVAL; + char *after; + unsigned long value = simple_strtoul(buf, &after, 10); + size_t count = after - buf; + + if (*after && isspace(*after)) + count++; + + if (count == size && value <= 10000) { + write_lock(&td->lock); + td->interval = msecs_to_jiffies(value); + usbdev_trig_update_state(td); /* resets timer */ + write_unlock(&td->lock); + ret = count; + } + + return ret; +} + +static DEVICE_ATTR(activity_interval, 0644, usbdev_trig_interval_show, + usbdev_trig_interval_store); + +static int usbdev_trig_notify(struct notifier_block *nb, + unsigned long evt, + void *data) +{ + struct usb_device *usb_dev; + struct usbdev_trig_data *td; + + if (evt != USB_DEVICE_ADD && evt != USB_DEVICE_REMOVE) + return NOTIFY_DONE; + + usb_dev = data; + td = container_of(nb, struct usbdev_trig_data, notifier); + + write_lock(&td->lock); + + if (strcmp(dev_name(&usb_dev->dev), td->device_name)) + goto done; + + if (evt == USB_DEVICE_ADD) { + usb_get_dev(usb_dev); + if (td->usb_dev != NULL) + usb_put_dev(td->usb_dev); + td->usb_dev = usb_dev; + td->last_urbnum = atomic_read(&usb_dev->urbnum); + } else if (evt == USB_DEVICE_REMOVE) { + if (td->usb_dev != NULL) { + usb_put_dev(td->usb_dev); + td->usb_dev = NULL; + } + } + + usbdev_trig_update_state(td); + +done: + write_unlock(&td->lock); + return NOTIFY_DONE; +} + +/* here's the real work! */ +static void usbdev_trig_timer(unsigned long arg) +{ + struct usbdev_trig_data *td = (struct usbdev_trig_data *)arg; + int new_urbnum; + + write_lock(&td->lock); + + if (!td->usb_dev || td->interval == 0) { + /* + * we don't need to do timer work, just reflect device presence + */ + if (td->usb_dev) + led_set_brightness(td->led_cdev, LED_FULL); + else + led_set_brightness(td->led_cdev, LED_OFF); + + goto no_restart; + } + + if (td->interval) + new_urbnum = atomic_read(&td->usb_dev->urbnum); + else + new_urbnum = 0; + + if (td->usb_dev) { + /* + * Base state is ON (device is present). If there's no device, + * we don't get this far and the LED is off. + * OFF -> ON always + * ON -> OFF on activity + */ + if (td->led_cdev->brightness == LED_OFF) + led_set_brightness(td->led_cdev, LED_FULL); + else if (td->last_urbnum != new_urbnum) + led_set_brightness(td->led_cdev, LED_OFF); + } else { + /* + * base state is OFF + * ON -> OFF always + * OFF -> ON on activity + */ + if (td->led_cdev->brightness == LED_FULL) + led_set_brightness(td->led_cdev, LED_OFF); + else if (td->last_urbnum != new_urbnum) + led_set_brightness(td->led_cdev, LED_FULL); + } + + td->last_urbnum = new_urbnum; + mod_timer(&td->timer, jiffies + td->interval); + +no_restart: + write_unlock(&td->lock); +} + +static void usbdev_trig_activate(struct led_classdev *led_cdev) +{ + struct usbdev_trig_data *td; + int rc; + + td = kzalloc(sizeof(struct usbdev_trig_data), GFP_KERNEL); + if (!td) + return; + + rwlock_init(&td->lock); + + td->notifier.notifier_call = usbdev_trig_notify; + td->notifier.priority = 10; + + setup_timer(&td->timer, usbdev_trig_timer, (unsigned long) td); + + td->led_cdev = led_cdev; + td->interval = msecs_to_jiffies(50); + + led_cdev->trigger_data = td; + + 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_activity_interval); + if (rc) + goto err_out_device_name; + + usb_register_notify(&td->notifier); + return; + +err_out_device_name: + device_remove_file(led_cdev->dev, &dev_attr_device_name); +err_out: + led_cdev->trigger_data = NULL; + kfree(td); +} + +static void usbdev_trig_deactivate(struct led_classdev *led_cdev) +{ + struct usbdev_trig_data *td = led_cdev->trigger_data; + + if (td) { + usb_unregister_notify(&td->notifier); + + device_remove_file(led_cdev->dev, &dev_attr_device_name); + device_remove_file(led_cdev->dev, &dev_attr_activity_interval); + + write_lock(&td->lock); + + if (td->usb_dev) { + usb_put_dev(td->usb_dev); + td->usb_dev = NULL; + } + + write_unlock(&td->lock); + + del_timer_sync(&td->timer); + + kfree(td); + } +} + +static struct led_trigger usbdev_led_trigger = { + .name = "usbdev", + .activate = usbdev_trig_activate, + .deactivate = usbdev_trig_deactivate, +}; + +static int __init usbdev_trig_init(void) +{ + return led_trigger_register(&usbdev_led_trigger); +} + +static void __exit usbdev_trig_exit(void) +{ + led_trigger_unregister(&usbdev_led_trigger); +} + +module_init(usbdev_trig_init); +module_exit(usbdev_trig_exit); + +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION("USB device LED trigger"); +MODULE_LICENSE("GPL v2"); |