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 } 58