drivers/net/wireless/broadcom/b43/rfkill.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3
   4   Broadcom B43 wireless driver
   5   RFKILL support
   6
   7   Copyright (c) 2007 Michael Buesch <m@bues.ch>
   8
   9
  10 */
  11
  12 #include "b43.h"
  13
  14
  15 /* Returns TRUE, if the radio is enabled in hardware. */
  16 bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
  17 {
  18         return !(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
  19                 & B43_MMIO_RADIO_HWENABLED_HI_MASK);
  20 }
  21
  22 /* The poll callback for the hardware button. */
  23 void b43_rfkill_poll(struct ieee80211_hw *hw)
  24 {
  25         struct b43_wl *wl = hw_to_b43_wl(hw);
  26         struct b43_wldev *dev = wl->current_dev;
  27         bool enabled;
  28         bool brought_up = false;
  29
  30         mutex_lock(&wl->mutex);
  31         if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
  32                 if (b43_bus_powerup(dev, 0)) {
  33                         mutex_unlock(&wl->mutex);
  34                         return;
  35                 }
  36                 b43_device_enable(dev, 0);
  37                 brought_up = true;
  38         }
  39
  40         enabled = b43_is_hw_radio_enabled(dev);
  41
  42         if (unlikely(enabled != dev->radio_hw_enable)) {
  43                 dev->radio_hw_enable = enabled;
  44                 b43info(wl, "Radio hardware status changed to %s\n",
  45                         enabled ? "ENABLED" : "DISABLED");
  46                 wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
  47                 if (enabled != dev->phy.radio_on)
  48                         b43_software_rfkill(dev, !enabled);
  49         }
  50
  51         if (brought_up) {
  52                 b43_device_disable(dev, 0);
  53                 b43_bus_may_powerdown(dev);
  54         }
  55
  56         mutex_unlock(&wl->mutex);
  57 }