// SPDX-License-Identifier: GPL-2.0-or-later
/*

  Broadcom B43 wireless driver
  RFKILL support

  Copyright (c) 2007 Michael Buesch <m@bues.ch>


*/

#include "b43.h"


/* Returns TRUE, if the radio is enabled in hardware. */
bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
{
        return !(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
                & B43_MMIO_RADIO_HWENABLED_HI_MASK);
}

/* The poll callback for the hardware button. */
void b43_rfkill_poll(struct ieee80211_hw *hw)
{
        struct b43_wl *wl = hw_to_b43_wl(hw);
        struct b43_wldev *dev = wl->current_dev;
        bool enabled;
        bool brought_up = false;

        mutex_lock(&wl->mutex);
        if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
                if (b43_bus_powerup(dev, 0)) {
                        mutex_unlock(&wl->mutex);
                        return;
                }
                b43_device_enable(dev, 0);
                brought_up = true;
        }

        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");
                wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
                if (enabled != dev->phy.radio_on)
                        b43_software_rfkill(dev, !enabled);
        }

        if (brought_up) {
                b43_device_disable(dev, 0);
                b43_bus_may_powerdown(dev);
        }

        mutex_unlock(&wl->mutex);
}