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/*
Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
<http://rt2x00.serialmonkey.com>
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.
*/
/*
Module: rt2x00rfkill
Abstract: rt2x00 rfkill routines.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/rfkill.h>
#include "rt2x00.h"
#include "rt2x00lib.h"
static int rt2x00rfkill_toggle_radio(void *data, enum rfkill_state state)
{
struct rt2x00_dev *rt2x00dev = data;
int retval = 0;
if (unlikely(!rt2x00dev))
return 0;
/*
* Only continue if there are enabled interfaces.
*/
if (!test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
return 0;
if (state == RFKILL_STATE_UNBLOCKED) {
INFO(rt2x00dev, "Hardware button pressed, enabling radio.\n");
clear_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags);
retval = rt2x00lib_enable_radio(rt2x00dev);
} else if (state == RFKILL_STATE_SOFT_BLOCKED) {
INFO(rt2x00dev, "Hardware button pressed, disabling radio.\n");
set_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags);
rt2x00lib_disable_radio(rt2x00dev);
} else {
WARNING(rt2x00dev, "Received unexpected rfkill state %d.\n",
state);
}
return retval;
}
static int rt2x00rfkill_get_state(void *data, enum rfkill_state *state)
{
struct rt2x00_dev *rt2x00dev = data;
*state = rt2x00dev->rfkill->state;
return 0;
}
static void rt2x00rfkill_poll(struct work_struct *work)
{
struct rt2x00_dev *rt2x00dev =
container_of(work, struct rt2x00_dev, rfkill_work.work);
int state;
if (!test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state))
return;
/*
* rfkill_poll reports 1 when the key has been pressed and the
* radio should be blocked.
*/
state = !rt2x00dev->ops->lib->rfkill_poll(rt2x00dev) ?
RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
rfkill_force_state(rt2x00dev->rfkill, state);
queue_delayed_work(rt2x00dev->hw->workqueue,
&rt2x00dev->rfkill_work, RFKILL_POLL_INTERVAL);
}
void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
{
if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||
!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))
return;
if (rfkill_register(rt2x00dev->rfkill)) {
ERROR(rt2x00dev, "Failed to register rfkill handler.\n");
return;
}
__set_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state);
/*
* Force initial poll which will detect the initial device state,
* and correctly sends the signal to the rfkill layer about this
* state.
*/
rt2x00rfkill_poll(&rt2x00dev->rfkill_work.work);
}
void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
{
if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||
!test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state))
return;
cancel_delayed_work_sync(&rt2x00dev->rfkill_work);
rfkill_unregister(rt2x00dev->rfkill);
__clear_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state);
}
void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
{
if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
return;
rt2x00dev->rfkill =
rfkill_allocate(wiphy_dev(rt2x00dev->hw->wiphy), RFKILL_TYPE_WLAN);
if (!rt2x00dev->rfkill) {
ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");
return;
}
rt2x00dev->rfkill->name = rt2x00dev->ops->name;
rt2x00dev->rfkill->data = rt2x00dev;
rt2x00dev->rfkill->state = -1;
rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;
rt2x00dev->rfkill->get_state = rt2x00rfkill_get_state;
INIT_DELAYED_WORK(&rt2x00dev->rfkill_work, rt2x00rfkill_poll);
return;
}
void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
{
if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) ||
!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))
return;
cancel_delayed_work_sync(&rt2x00dev->rfkill_work);
rfkill_free(rt2x00dev->rfkill);
rt2x00dev->rfkill = NULL;
}
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