LXR linux/drivers/net/wireless/b43/rfkill.c

   1/*
   2
   3  Broadcom B43 wireless driver
   4  RFKILL support
   5
   6  Copyright (c) 2007 Michael Buesch <m@bues.ch>
   7
   8  This program is free software; you can redistribute it and/or modify
   9  it under the terms of the GNU General Public License as published by
  10  the Free Software Foundation; either version 2 of the License, or
  11  (at your option) any later version.
  12
  13  This program is distributed in the hope that it will be useful,
  14  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  GNU General Public License for more details.
  17
  18  You should have received a copy of the GNU General Public License
  19  along with this program; see the file COPYING.  If not, write to
  20  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  21  Boston, MA 02110-1301, USA.
  22
  23*/
  24
  25#include "b43.h"
  26
  27
  28/* Returns TRUE, if the radio is enabled in hardware. */
  29bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
  30{
  31        return !(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
  32                & B43_MMIO_RADIO_HWENABLED_HI_MASK);
  33}
  34
  35/* The poll callback for the hardware button. */
  36void b43_rfkill_poll(struct ieee80211_hw *hw)
  37{
  38        struct b43_wl *wl = hw_to_b43_wl(hw);
  39        struct b43_wldev *dev = wl->current_dev;
  40        bool enabled;
  41        bool brought_up = false;
  42
  43        mutex_lock(&wl->mutex);
  44        if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
  45                if (b43_bus_powerup(dev, 0)) {
  46                        mutex_unlock(&wl->mutex);
  47                        return;
  48                }
  49                b43_device_enable(dev, 0);
  50                brought_up = true;
  51        }
  52
  53        enabled = b43_is_hw_radio_enabled(dev);
  54
  55        if (unlikely(enabled != dev->radio_hw_enable)) {
  56                dev->radio_hw_enable = enabled;
  57                b43info(wl, "Radio hardware status changed to %s\n",
  58                        enabled ? "ENABLED" : "DISABLED");
  59                wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
  60                if (enabled != dev->phy.radio_on)
  61                        b43_software_rfkill(dev, !enabled);
  62        }
  63
  64        if (brought_up) {
  65                b43_device_disable(dev, 0);
  66                b43_bus_may_powerdown(dev);
  67        }
  68
  69        mutex_unlock(&wl->mutex);
  70}
  71