2007-05-07 07:34:20 +00:00
|
|
|
/*
|
2007-09-27 21:57:05 +00:00
|
|
|
* Copyright (C) 2006 - 2007 Ivo van Doorn
|
2007-05-07 07:34:20 +00:00
|
|
|
* Copyright (C) 2007 Dmitry Torokhov
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License as published by
|
|
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
|
|
* (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the
|
|
|
|
* Free Software Foundation, Inc.,
|
|
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <linux/capability.h>
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/mutex.h>
|
|
|
|
#include <linux/rfkill.h>
|
|
|
|
|
2007-11-02 19:18:11 +00:00
|
|
|
/* Get declaration of rfkill_switch_all() to shut up sparse. */
|
|
|
|
#include "rfkill-input.h"
|
|
|
|
|
|
|
|
|
2007-05-07 07:34:20 +00:00
|
|
|
MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
|
|
|
|
MODULE_VERSION("1.0");
|
|
|
|
MODULE_DESCRIPTION("RF switch support");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
static LIST_HEAD(rfkill_list); /* list of registered rf switches */
|
|
|
|
static DEFINE_MUTEX(rfkill_mutex);
|
|
|
|
|
|
|
|
static enum rfkill_state rfkill_states[RFKILL_TYPE_MAX];
|
|
|
|
|
2007-09-27 19:33:12 +00:00
|
|
|
|
|
|
|
static void rfkill_led_trigger(struct rfkill *rfkill,
|
|
|
|
enum rfkill_state state)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_RFKILL_LEDS
|
|
|
|
struct led_trigger *led = &rfkill->led_trigger;
|
|
|
|
|
|
|
|
if (!led->name)
|
|
|
|
return;
|
|
|
|
if (state == RFKILL_STATE_OFF)
|
|
|
|
led_trigger_event(led, LED_OFF);
|
|
|
|
else
|
|
|
|
led_trigger_event(led, LED_FULL);
|
|
|
|
#endif /* CONFIG_RFKILL_LEDS */
|
|
|
|
}
|
|
|
|
|
2007-05-07 07:34:20 +00:00
|
|
|
static int rfkill_toggle_radio(struct rfkill *rfkill,
|
|
|
|
enum rfkill_state state)
|
|
|
|
{
|
2007-11-28 16:49:34 +00:00
|
|
|
int retval = 0;
|
2007-05-07 07:34:20 +00:00
|
|
|
|
|
|
|
if (state != rfkill->state) {
|
|
|
|
retval = rfkill->toggle_radio(rfkill->data, state);
|
2007-09-27 19:33:12 +00:00
|
|
|
if (!retval) {
|
2007-05-07 07:34:20 +00:00
|
|
|
rfkill->state = state;
|
2007-09-27 19:33:12 +00:00
|
|
|
rfkill_led_trigger(rfkill, state);
|
|
|
|
}
|
2007-05-07 07:34:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rfkill_switch_all - Toggle state of all switches of given type
|
|
|
|
* @type: type of interfaces to be affeceted
|
|
|
|
* @state: the new state
|
|
|
|
*
|
|
|
|
* This function toggles state of all switches of given type unless
|
|
|
|
* a specific switch is claimed by userspace in which case it is
|
|
|
|
* left alone.
|
|
|
|
*/
|
|
|
|
|
|
|
|
void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill;
|
|
|
|
|
|
|
|
mutex_lock(&rfkill_mutex);
|
|
|
|
|
|
|
|
rfkill_states[type] = state;
|
|
|
|
|
|
|
|
list_for_each_entry(rfkill, &rfkill_list, node) {
|
|
|
|
if (!rfkill->user_claim)
|
|
|
|
rfkill_toggle_radio(rfkill, state);
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&rfkill_mutex);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(rfkill_switch_all);
|
|
|
|
|
|
|
|
static ssize_t rfkill_name_show(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
|
|
|
|
return sprintf(buf, "%s\n", rfkill->name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t rfkill_type_show(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
const char *type;
|
|
|
|
|
|
|
|
switch (rfkill->type) {
|
|
|
|
case RFKILL_TYPE_WLAN:
|
|
|
|
type = "wlan";
|
|
|
|
break;
|
|
|
|
case RFKILL_TYPE_BLUETOOTH:
|
|
|
|
type = "bluetooth";
|
|
|
|
break;
|
2007-09-13 07:21:31 +00:00
|
|
|
case RFKILL_TYPE_UWB:
|
|
|
|
type = "ultrawideband";
|
|
|
|
break;
|
2008-01-23 21:40:27 +00:00
|
|
|
case RFKILL_TYPE_WIMAX:
|
|
|
|
type = "wimax";
|
|
|
|
break;
|
2007-05-07 07:34:20 +00:00
|
|
|
default:
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
|
|
|
|
return sprintf(buf, "%s\n", type);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t rfkill_state_show(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
|
|
|
|
return sprintf(buf, "%d\n", rfkill->state);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t rfkill_state_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
unsigned int state = simple_strtoul(buf, NULL, 0);
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
|
|
return -EPERM;
|
|
|
|
|
2007-11-28 16:49:34 +00:00
|
|
|
if (mutex_lock_interruptible(&rfkill->mutex))
|
|
|
|
return -ERESTARTSYS;
|
2007-05-07 07:34:20 +00:00
|
|
|
error = rfkill_toggle_radio(rfkill,
|
|
|
|
state ? RFKILL_STATE_ON : RFKILL_STATE_OFF);
|
2007-11-28 16:49:34 +00:00
|
|
|
mutex_unlock(&rfkill->mutex);
|
2007-05-07 07:34:20 +00:00
|
|
|
|
2007-11-28 16:49:34 +00:00
|
|
|
return error ? error : count;
|
2007-05-07 07:34:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t rfkill_claim_show(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
char *buf)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
|
|
|
|
return sprintf(buf, "%d", rfkill->user_claim);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t rfkill_claim_store(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
bool claim = !!simple_strtoul(buf, NULL, 0);
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Take the global lock to make sure the kernel is not in
|
|
|
|
* the middle of rfkill_switch_all
|
|
|
|
*/
|
|
|
|
error = mutex_lock_interruptible(&rfkill_mutex);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
|
2007-09-27 19:34:23 +00:00
|
|
|
if (rfkill->user_claim_unsupported) {
|
|
|
|
error = -EOPNOTSUPP;
|
|
|
|
goto out_unlock;
|
|
|
|
}
|
2007-05-07 07:34:20 +00:00
|
|
|
if (rfkill->user_claim != claim) {
|
|
|
|
if (!claim)
|
|
|
|
rfkill_toggle_radio(rfkill,
|
|
|
|
rfkill_states[rfkill->type]);
|
|
|
|
rfkill->user_claim = claim;
|
|
|
|
}
|
|
|
|
|
2007-09-27 19:34:23 +00:00
|
|
|
out_unlock:
|
2007-05-07 07:34:20 +00:00
|
|
|
mutex_unlock(&rfkill_mutex);
|
|
|
|
|
2007-09-27 19:34:23 +00:00
|
|
|
return error ? error : count;
|
2007-05-07 07:34:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct device_attribute rfkill_dev_attrs[] = {
|
|
|
|
__ATTR(name, S_IRUGO, rfkill_name_show, NULL),
|
|
|
|
__ATTR(type, S_IRUGO, rfkill_type_show, NULL),
|
2007-07-18 22:38:03 +00:00
|
|
|
__ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store),
|
2007-05-07 07:34:20 +00:00
|
|
|
__ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store),
|
|
|
|
__ATTR_NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static void rfkill_release(struct device *dev)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
|
|
|
|
kfree(rfkill);
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int rfkill_suspend(struct device *dev, pm_message_t state)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
|
|
|
|
if (dev->power.power_state.event != state.event) {
|
|
|
|
if (state.event == PM_EVENT_SUSPEND) {
|
|
|
|
mutex_lock(&rfkill->mutex);
|
|
|
|
|
|
|
|
if (rfkill->state == RFKILL_STATE_ON)
|
|
|
|
rfkill->toggle_radio(rfkill->data,
|
|
|
|
RFKILL_STATE_OFF);
|
|
|
|
|
|
|
|
mutex_unlock(&rfkill->mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
dev->power.power_state = state;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rfkill_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill = to_rfkill(dev);
|
|
|
|
|
|
|
|
if (dev->power.power_state.event != PM_EVENT_ON) {
|
|
|
|
mutex_lock(&rfkill->mutex);
|
|
|
|
|
|
|
|
if (rfkill->state == RFKILL_STATE_ON)
|
|
|
|
rfkill->toggle_radio(rfkill->data, RFKILL_STATE_ON);
|
|
|
|
|
|
|
|
mutex_unlock(&rfkill->mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
dev->power.power_state = PMSG_ON;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
#define rfkill_suspend NULL
|
|
|
|
#define rfkill_resume NULL
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static struct class rfkill_class = {
|
|
|
|
.name = "rfkill",
|
|
|
|
.dev_release = rfkill_release,
|
|
|
|
.dev_attrs = rfkill_dev_attrs,
|
|
|
|
.suspend = rfkill_suspend,
|
|
|
|
.resume = rfkill_resume,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int rfkill_add_switch(struct rfkill *rfkill)
|
|
|
|
{
|
2007-10-28 14:16:50 +00:00
|
|
|
int error;
|
2007-05-07 07:34:20 +00:00
|
|
|
|
2007-10-28 14:16:50 +00:00
|
|
|
mutex_lock(&rfkill_mutex);
|
2007-05-07 07:34:20 +00:00
|
|
|
|
2007-10-28 14:16:50 +00:00
|
|
|
error = rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type]);
|
|
|
|
if (!error)
|
|
|
|
list_add_tail(&rfkill->node, &rfkill_list);
|
2007-05-07 07:34:20 +00:00
|
|
|
|
|
|
|
mutex_unlock(&rfkill_mutex);
|
2007-10-28 14:16:50 +00:00
|
|
|
|
|
|
|
return error;
|
2007-05-07 07:34:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void rfkill_remove_switch(struct rfkill *rfkill)
|
|
|
|
{
|
|
|
|
mutex_lock(&rfkill_mutex);
|
|
|
|
list_del_init(&rfkill->node);
|
|
|
|
rfkill_toggle_radio(rfkill, RFKILL_STATE_OFF);
|
|
|
|
mutex_unlock(&rfkill_mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rfkill_allocate - allocate memory for rfkill structure.
|
|
|
|
* @parent: device that has rf switch on it
|
2007-09-13 07:20:42 +00:00
|
|
|
* @type: type of the switch (RFKILL_TYPE_*)
|
2007-05-07 07:34:20 +00:00
|
|
|
*
|
|
|
|
* This function should be called by the network driver when it needs
|
|
|
|
* rfkill structure. Once the structure is allocated the driver shoud
|
|
|
|
* finish its initialization by setting name, private data, enable_radio
|
|
|
|
* and disable_radio methods and then register it with rfkill_register().
|
|
|
|
* NOTE: If registration fails the structure shoudl be freed by calling
|
|
|
|
* rfkill_free() otherwise rfkill_unregister() should be used.
|
|
|
|
*/
|
|
|
|
struct rfkill *rfkill_allocate(struct device *parent, enum rfkill_type type)
|
|
|
|
{
|
|
|
|
struct rfkill *rfkill;
|
|
|
|
struct device *dev;
|
|
|
|
|
|
|
|
rfkill = kzalloc(sizeof(struct rfkill), GFP_KERNEL);
|
2007-05-19 19:24:39 +00:00
|
|
|
if (!rfkill)
|
2007-05-07 07:34:20 +00:00
|
|
|
return NULL;
|
|
|
|
|
|
|
|
mutex_init(&rfkill->mutex);
|
|
|
|
INIT_LIST_HEAD(&rfkill->node);
|
|
|
|
rfkill->type = type;
|
|
|
|
|
|
|
|
dev = &rfkill->dev;
|
|
|
|
dev->class = &rfkill_class;
|
|
|
|
dev->parent = parent;
|
|
|
|
device_initialize(dev);
|
|
|
|
|
|
|
|
__module_get(THIS_MODULE);
|
|
|
|
|
|
|
|
return rfkill;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(rfkill_allocate);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rfkill_free - Mark rfkill structure for deletion
|
|
|
|
* @rfkill: rfkill structure to be destroyed
|
|
|
|
*
|
|
|
|
* Decrements reference count of rfkill structure so it is destoryed.
|
|
|
|
* Note that rfkill_free() should _not_ be called after rfkill_unregister().
|
|
|
|
*/
|
|
|
|
void rfkill_free(struct rfkill *rfkill)
|
|
|
|
{
|
|
|
|
if (rfkill)
|
|
|
|
put_device(&rfkill->dev);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(rfkill_free);
|
|
|
|
|
2007-09-27 19:33:12 +00:00
|
|
|
static void rfkill_led_trigger_register(struct rfkill *rfkill)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_RFKILL_LEDS
|
|
|
|
int error;
|
|
|
|
|
|
|
|
rfkill->led_trigger.name = rfkill->dev.bus_id;
|
|
|
|
error = led_trigger_register(&rfkill->led_trigger);
|
|
|
|
if (error)
|
|
|
|
rfkill->led_trigger.name = NULL;
|
|
|
|
#endif /* CONFIG_RFKILL_LEDS */
|
|
|
|
}
|
|
|
|
|
|
|
|
static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
|
|
|
|
{
|
|
|
|
#ifdef CONFIG_RFKILL_LEDS
|
|
|
|
if (rfkill->led_trigger.name)
|
|
|
|
led_trigger_unregister(&rfkill->led_trigger);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2007-05-07 07:34:20 +00:00
|
|
|
/**
|
|
|
|
* rfkill_register - Register a rfkill structure.
|
|
|
|
* @rfkill: rfkill structure to be registered
|
|
|
|
*
|
|
|
|
* This function should be called by the network driver when the rfkill
|
|
|
|
* structure needs to be registered. Immediately from registration the
|
|
|
|
* switch driver should be able to service calls to toggle_radio.
|
|
|
|
*/
|
|
|
|
int rfkill_register(struct rfkill *rfkill)
|
|
|
|
{
|
|
|
|
static atomic_t rfkill_no = ATOMIC_INIT(0);
|
|
|
|
struct device *dev = &rfkill->dev;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
if (!rfkill->toggle_radio)
|
|
|
|
return -EINVAL;
|
2007-10-28 14:16:50 +00:00
|
|
|
if (rfkill->type >= RFKILL_TYPE_MAX)
|
|
|
|
return -EINVAL;
|
2007-05-07 07:34:20 +00:00
|
|
|
|
2007-10-28 12:07:54 +00:00
|
|
|
snprintf(dev->bus_id, sizeof(dev->bus_id),
|
|
|
|
"rfkill%ld", (long)atomic_inc_return(&rfkill_no) - 1);
|
|
|
|
|
|
|
|
rfkill_led_trigger_register(rfkill);
|
|
|
|
|
2007-05-07 07:34:20 +00:00
|
|
|
error = rfkill_add_switch(rfkill);
|
2008-01-13 21:20:56 +00:00
|
|
|
if (error) {
|
|
|
|
rfkill_led_trigger_unregister(rfkill);
|
2007-05-07 07:34:20 +00:00
|
|
|
return error;
|
2008-01-13 21:20:56 +00:00
|
|
|
}
|
2007-05-07 07:34:20 +00:00
|
|
|
|
|
|
|
error = device_add(dev);
|
|
|
|
if (error) {
|
2008-01-13 21:20:56 +00:00
|
|
|
rfkill_led_trigger_unregister(rfkill);
|
2007-05-07 07:34:20 +00:00
|
|
|
rfkill_remove_switch(rfkill);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(rfkill_register);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rfkill_unregister - Uegister a rfkill structure.
|
|
|
|
* @rfkill: rfkill structure to be unregistered
|
|
|
|
*
|
|
|
|
* This function should be called by the network driver during device
|
|
|
|
* teardown to destroy rfkill structure. Note that rfkill_free() should
|
|
|
|
* _not_ be called after rfkill_unregister().
|
|
|
|
*/
|
|
|
|
void rfkill_unregister(struct rfkill *rfkill)
|
|
|
|
{
|
|
|
|
device_del(&rfkill->dev);
|
|
|
|
rfkill_remove_switch(rfkill);
|
2007-10-28 12:07:54 +00:00
|
|
|
rfkill_led_trigger_unregister(rfkill);
|
2007-05-07 07:34:20 +00:00
|
|
|
put_device(&rfkill->dev);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(rfkill_unregister);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Rfkill module initialization/deinitialization.
|
|
|
|
*/
|
|
|
|
static int __init rfkill_init(void)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(rfkill_states); i++)
|
|
|
|
rfkill_states[i] = RFKILL_STATE_ON;
|
|
|
|
|
|
|
|
error = class_register(&rfkill_class);
|
|
|
|
if (error) {
|
|
|
|
printk(KERN_ERR "rfkill: unable to register rfkill class\n");
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit rfkill_exit(void)
|
|
|
|
{
|
|
|
|
class_unregister(&rfkill_class);
|
|
|
|
}
|
|
|
|
|
2007-10-28 13:39:02 +00:00
|
|
|
subsys_initcall(rfkill_init);
|
2007-05-07 07:34:20 +00:00
|
|
|
module_exit(rfkill_exit);
|