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 <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 "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        if (dev->phy.rev >= 3 || dev->phy.type == B43_PHYTYPE_LP) {
  32                if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
  33                      & B43_MMIO_RADIO_HWENABLED_HI_MASK))
  34                        return 1;
  35        } else {
  36                if (b43_status(dev) >= B43_STAT_STARTED &&
  37                    b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
  38                    & B43_MMIO_RADIO_HWENABLED_LO_MASK)
  39                        return 1;
  40        }
  41        return 0;
  42}
  43
  44/* The poll callback for the hardware button. */
  45void b43_rfkill_poll(struct ieee80211_hw *hw)
  46{
  47        struct b43_wl *wl = hw_to_b43_wl(hw);
  48        struct b43_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(b43_status(dev) < B43_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 = b43_is_hw_radio_enabled(dev);
  64
  65        if (unlikely(enabled != dev->radio_hw_enable)) {
  66                dev->radio_hw_enable = enabled;
  67                b43info(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                        b43_software_rfkill(dev, !enabled);
  72        }
  73
  74        if (brought_up) {
  75                ssb_device_disable(dev->dev, 0);
  76                ssb_bus_may_powerdown(bus);
  77        }
  78
  79        mutex_unlock(&wl->mutex);
  80}
  81