drivers/net/wireless/b43legacy/rfkill.c

   1 /*
   2
   3   Broadcom B43 wireless driver
   4   RFKILL support
   5
   6   Copyright (c) 2007 Michael Buesch <mb@bu3sch.de>
   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 "radio.h"
  26 #include "b43legacy.h"
  27
  28
  29 /* Returns TRUE, if the radio is enabled in hardware. */
  30 bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
  31 {
  32         if (dev->phy.rev >= 3) {
  33                 if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
  34                       & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
  35                         return 1;
  36         } else {
  37                 if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
  38                     & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
  39                         return 1;
  40         }
  41         return 0;
  42 }
  43
  44 /* The poll callback for the hardware button. */
  45 void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
  46 {
  47         struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
  48         struct b43legacy_wldev *dev = wl->current_dev;
  49         struct ssb_bus *bus = dev->dev->bus;
  50         bool enabled;
  51         bool brought_up = false;
  52
  53         mutex_lock(&wl->mutex);
  54         if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
  55                 if (ssb_bus_powerup(bus, 0)) {
  56                         mutex_unlock(&wl->mutex);
  57                         return;
  58                 }
  59                 ssb_device_enable(dev->dev, 0);
  60                 brought_up = true;
  61         }
  62
  63         enabled = b43legacy_is_hw_radio_enabled(dev);
  64
  65         if (unlikely(enabled != dev->radio_hw_enable)) {
  66                 dev->radio_hw_enable = enabled;
  67                 b43legacyinfo(wl, "Radio hardware status changed to %s\n",
  68                         enabled ? "ENABLED" : "DISABLED");
  69                 wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
  70                 if (enabled != dev->phy.radio_on) {
  71                         if (enabled)
  72                                 b43legacy_radio_turn_on(dev);
  73                         else
  74                                 b43legacy_radio_turn_off(dev, 0);
  75                 }
  76         }
  77
  78         if (brought_up) {
  79                 ssb_device_disable(dev->dev, 0);
  80                 ssb_bus_may_powerdown(bus);
  81         }
  82
  83         mutex_unlock(&wl->mutex);
  84 }