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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 4 Broadcom B43 wireless driver5 RFKILL support6 7 Copyright (c) 2007 Michael Buesch <m@bues.ch>8 9 10*/11 12#include "radio.h"13#include "b43legacy.h"14 15 16/* Returns TRUE, if the radio is enabled in hardware. */17bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)18{19 if (dev->dev->id.revision >= 3) {20 if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)21 & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))22 return true;23 } else {24 /* To prevent CPU fault on PPC, do not read a register25 * unless the interface is started; however, on resume26 * for hibernation, this routine is entered early. When27 * that happens, unconditionally return TRUE.28 */29 if (b43legacy_status(dev) < B43legacy_STAT_STARTED)30 return true;31 if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)32 & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)33 return true;34 }35 return false;36}37 38/* The poll callback for the hardware button. */39void b43legacy_rfkill_poll(struct ieee80211_hw *hw)40{41 struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);42 struct b43legacy_wldev *dev = wl->current_dev;43 struct ssb_bus *bus = dev->dev->bus;44 bool enabled;45 bool brought_up = false;46 47 mutex_lock(&wl->mutex);48 if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {49 if (ssb_bus_powerup(bus, 0)) {50 mutex_unlock(&wl->mutex);51 return;52 }53 ssb_device_enable(dev->dev, 0);54 brought_up = true;55 }56 57 enabled = b43legacy_is_hw_radio_enabled(dev);58 59 if (unlikely(enabled != dev->radio_hw_enable)) {60 dev->radio_hw_enable = enabled;61 b43legacyinfo(wl, "Radio hardware status changed to %s\n",62 enabled ? "ENABLED" : "DISABLED");63 wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);64 if (enabled != dev->phy.radio_on) {65 if (enabled)66 b43legacy_radio_turn_on(dev);67 else68 b43legacy_radio_turn_off(dev, 0);69 }70 }71 72 if (brought_up) {73 ssb_device_disable(dev->dev, 0);74 ssb_bus_may_powerdown(bus);75 }76 77 mutex_unlock(&wl->mutex);78}79