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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"
#include "phy_common.h"
#include <linux/kmod.h>
/* Returns TRUE, if the radio is enabled in hardware. */
static bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
{
if (dev->phy.rev >= 3) {
if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
& B43_MMIO_RADIO_HWENABLED_HI_MASK))
return 1;
} else {
if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
& B43_MMIO_RADIO_HWENABLED_LO_MASK)
return 1;
}
return 0;
}
/* The poll callback for the hardware button. */
static void b43_rfkill_poll(struct rfkill *rfkill, void *data)
{
struct b43_wldev *dev = data;
struct b43_wl *wl = dev->wl;
bool enabled;
mutex_lock(&wl->mutex);
if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
mutex_unlock(&wl->mutex);
return;
}
enabled = b43_is_hw_radio_enabled(dev);
if (unlikely(enabled != dev->radio_hw_enable)) {
dev->radio_hw_enable = enabled;
b43info(wl, "Radio hardware status changed to %s\n",
enabled ? "ENABLED" : "DISABLED");
enabled = !rfkill_set_hw_state(rfkill, !enabled);
if (enabled != dev->phy.radio_on)
b43_software_rfkill(dev, !enabled);
}
mutex_unlock(&wl->mutex);
}
/* Called when the RFKILL toggled in software. */
static int b43_rfkill_soft_set(void *data, bool blocked)
{
struct b43_wldev *dev = data;
struct b43_wl *wl = dev->wl;
int err = -EINVAL;
if (WARN_ON(!wl->rfkill.registered))
return -EINVAL;
mutex_lock(&wl->mutex);
if (b43_status(dev) < B43_STAT_INITIALIZED)
goto out_unlock;
if (!dev->radio_hw_enable)
goto out_unlock;
if (!blocked != dev->phy.radio_on)
b43_software_rfkill(dev, blocked);
err = 0;
out_unlock:
mutex_unlock(&wl->mutex);
return err;
}
const char *b43_rfkill_led_name(struct b43_wldev *dev)
{
struct b43_rfkill *rfk = &(dev->wl->rfkill);
if (!rfk->registered)
return NULL;
return rfkill_get_led_trigger_name(rfk->rfkill);
}
static const struct rfkill_ops b43_rfkill_ops = {
.set_block = b43_rfkill_soft_set,
.poll = b43_rfkill_poll,
};
void b43_rfkill_init(struct b43_wldev *dev)
{
struct b43_wl *wl = dev->wl;
struct b43_rfkill *rfk = &(wl->rfkill);
int err;
rfk->registered = 0;
snprintf(rfk->name, sizeof(rfk->name),
"b43-%s", wiphy_name(wl->hw->wiphy));
rfk->rfkill = rfkill_alloc(rfk->name,
dev->dev->dev,
RFKILL_TYPE_WLAN,
&b43_rfkill_ops, dev);
if (!rfk->rfkill)
goto out_error;
err = rfkill_register(rfk->rfkill);
if (err)
goto err_free;
rfk->registered = 1;
return;
err_free:
rfkill_destroy(rfk->rfkill);
out_error:
rfk->registered = 0;
b43warn(wl, "RF-kill button init failed\n");
}
void b43_rfkill_exit(struct b43_wldev *dev)
{
struct b43_rfkill *rfk = &(dev->wl->rfkill);
if (!rfk->registered)
return;
rfk->registered = 0;
rfkill_unregister(rfk->rfkill);
rfkill_destroy(rfk->rfkill);
rfk->rfkill = NULL;
}
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