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/*
Broadcom B43 wireless driver
RFKILL support
Copyright (c) 2007 Michael Buesch <mb@bu3sch.de>
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; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "rfkill.h"
#include "b43.h"
static void b43_notify_rfkill_press(struct work_struct *work)
{
struct b43_rfkill *rfk = container_of(work, struct b43_rfkill,
notify_work);
struct b43_wl *wl = container_of(rfk, struct b43_wl, rfkill);
struct b43_wldev *dev;
enum rfkill_state state;
mutex_lock(&wl->mutex);
dev = wl->current_dev;
if (b43_status(dev) < B43_STAT_INITIALIZED) {
mutex_unlock(&wl->mutex);
return;
}
if (dev->radio_hw_enable)
state = RFKILL_STATE_ON;
else
state = RFKILL_STATE_OFF;
b43info(wl, "Radio hardware status changed to %s\n",
dev->radio_hw_enable ? "ENABLED" : "DISABLED");
mutex_unlock(&wl->mutex);
if (rfk->rfkill) {
/* Be careful. This calls back into the software toggle routines.
* So we must unlock before calling. */
rfkill_switch_all(rfk->rfkill->type, state);
}
}
/* Called when the RFKILL toggled in hardware.
* This is called with the mutex locked. */
void b43_rfkill_toggled(struct b43_wldev *dev, bool on)
{
struct b43_wl *wl = dev->wl;
B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED);
/* Update the RF status asynchronously, as rfkill will
* call back into the software toggle handler.
* This would deadlock if done synchronously. */
queue_work(wl->hw->workqueue, &wl->rfkill.notify_work);
}
/* Called when the RFKILL toggled in software.
* This is called without locking. */
static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
{
struct b43_wldev *dev = data;
struct b43_wl *wl = dev->wl;
int err = 0;
mutex_lock(&wl->mutex);
if (b43_status(dev) < B43_STAT_INITIALIZED)
goto out_unlock;
switch (state) {
case RFKILL_STATE_ON:
if (!dev->radio_hw_enable) {
/* No luck. We can't toggle the hardware RF-kill
* button from software. */
err = -EBUSY;
goto out_unlock;
}
if (!dev->phy.radio_on)
b43_radio_turn_on(dev);
break;
case RFKILL_STATE_OFF:
if (dev->phy.radio_on)
b43_radio_turn_off(dev, 0);
break;
}
out_unlock:
mutex_unlock(&wl->mutex);
return err;
}
char * b43_rfkill_led_name(struct b43_wldev *dev)
{
struct b43_wl *wl = dev->wl;
if (!wl->rfkill.rfkill)
return NULL;
return rfkill_get_led_name(wl->rfkill.rfkill);
}
void b43_rfkill_init(struct b43_wldev *dev)
{
struct b43_wl *wl = dev->wl;
struct b43_rfkill *rfk = &(wl->rfkill);
int err;
snprintf(rfk->name, sizeof(rfk->name),
"b43-%s", wiphy_name(wl->hw->wiphy));
rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
if (!rfk->rfkill)
goto error;
rfk->rfkill->name = rfk->name;
rfk->rfkill->state = RFKILL_STATE_ON;
rfk->rfkill->data = dev;
rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
rfk->rfkill->user_claim_unsupported = 1;
INIT_WORK(&rfk->notify_work, b43_notify_rfkill_press);
err = rfkill_register(rfk->rfkill);
if (err)
goto error;
return;
error:
b43warn(dev->wl, "Failed to initialize the RF-kill button\n");
rfkill_free(rfk->rfkill);
rfk->rfkill = NULL;
}
void b43_rfkill_exit(struct b43_wldev *dev)
{
struct b43_rfkill *rfk = &(dev->wl->rfkill);
if (!rfk->rfkill)
return;
cancel_work_sync(&rfk->notify_work);
rfkill_unregister(rfk->rfkill);
rfkill_free(rfk->rfkill);
rfk->rfkill = NULL;
}
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