LXR linux/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. */
  16bool 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. */
  23void 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}
  58