79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Broadcom B43 wireless driver
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RFKILL support
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Copyright (c) 2007 Michael Buesch <m@bues.ch>
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*/
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#include "radio.h"
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#include "b43legacy.h"
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/* Returns TRUE, if the radio is enabled in hardware. */
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bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
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{
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if (dev->dev->id.revision >= 3) {
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if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
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& B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
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return true;
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} else {
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/* To prevent CPU fault on PPC, do not read a register
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* unless the interface is started; however, on resume
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* for hibernation, this routine is entered early. When
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* that happens, unconditionally return TRUE.
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*/
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if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
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return true;
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if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
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& B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
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return true;
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}
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return false;
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}
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/* The poll callback for the hardware button. */
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void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
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{
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struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
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struct b43legacy_wldev *dev = wl->current_dev;
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struct ssb_bus *bus = dev->dev->bus;
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bool enabled;
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bool brought_up = false;
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mutex_lock(&wl->mutex);
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if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
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if (ssb_bus_powerup(bus, 0)) {
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mutex_unlock(&wl->mutex);
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return;
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}
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ssb_device_enable(dev->dev, 0);
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brought_up = true;
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}
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enabled = b43legacy_is_hw_radio_enabled(dev);
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if (unlikely(enabled != dev->radio_hw_enable)) {
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dev->radio_hw_enable = enabled;
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b43legacyinfo(wl, "Radio hardware status changed to %s\n",
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enabled ? "ENABLED" : "DISABLED");
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wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
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if (enabled != dev->phy.radio_on) {
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if (enabled)
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b43legacy_radio_turn_on(dev);
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else
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b43legacy_radio_turn_off(dev, 0);
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}
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}
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if (brought_up) {
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ssb_device_disable(dev->dev, 0);
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ssb_bus_may_powerdown(bus);
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}
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mutex_unlock(&wl->mutex);
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}
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