linux_dsm_epyc7002/drivers/net/wireless/b43legacy/rfkill.c

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/*
Broadcom B43 wireless driver
RFKILL support
Copyright (c) 2007 Michael Buesch <m@bues.ch>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "radio.h"
#include "b43legacy.h"
/* Returns TRUE, if the radio is enabled in hardware. */
bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
{
if (dev->dev->id.revision >= 3) {
if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
& B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
return 1;
} else {
/* To prevent CPU fault on PPC, do not read a register
* unless the interface is started; however, on resume
* for hibernation, this routine is entered early. When
* that happens, unconditionally return TRUE.
*/
if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
return 1;
if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
& B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
return 1;
}
return 0;
}
/* The poll callback for the hardware button. */
void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
struct ssb_bus *bus = dev->dev->bus;
bool enabled;
bool brought_up = false;
mutex_lock(&wl->mutex);
if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
if (ssb_bus_powerup(bus, 0)) {
mutex_unlock(&wl->mutex);
return;
}
ssb_device_enable(dev->dev, 0);
brought_up = true;
}
enabled = b43legacy_is_hw_radio_enabled(dev);
if (unlikely(enabled != dev->radio_hw_enable)) {
dev->radio_hw_enable = enabled;
b43legacyinfo(wl, "Radio hardware status changed to %s\n",
enabled ? "ENABLED" : "DISABLED");
wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
rfkill: rewrite This patch completely rewrites the rfkill core to address the following deficiencies: * all rfkill drivers need to implement polling where necessary rather than having one central implementation * updating the rfkill state cannot be done from arbitrary contexts, forcing drivers to use schedule_work and requiring lots of code * rfkill drivers need to keep track of soft/hard blocked internally -- the core should do this * the rfkill API has many unexpected quirks, for example being asymmetric wrt. alloc/free and register/unregister * rfkill can call back into a driver from within a function the driver called -- this is prone to deadlocks and generally should be avoided * rfkill-input pointlessly is a separate module * drivers need to #ifdef rfkill functions (unless they want to depend on or select RFKILL) -- rfkill should provide inlines that do nothing if it isn't compiled in * the rfkill structure is not opaque -- drivers need to initialise it correctly (lots of sanity checking code required) -- instead force drivers to pass the right variables to rfkill_alloc() * the documentation is hard to read because it always assumes the reader is completely clueless and contains way TOO MANY CAPS * the rfkill code needlessly uses a lot of locks and atomic operations in locked sections * fix LED trigger to actually change the LED when the radio state changes -- this wasn't done before Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> [thinkpad] Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-06-02 18:01:37 +07:00
if (enabled != dev->phy.radio_on) {
if (enabled)
b43legacy_radio_turn_on(dev);
else
b43legacy_radio_turn_off(dev, 0);
}
}
if (brought_up) {
ssb_device_disable(dev->dev, 0);
ssb_bus_may_powerdown(bus);
}
mutex_unlock(&wl->mutex);
}