[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / b43legacy / rfkill.c

/*

  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);
		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);
}
Commit	Line	Data
93bb7f3a LF	1	/*
93bb7f3a LF	2
6be50837	3	Broadcom B43 wireless driver
93bb7f3a LF	4	RFKILL support
93bb7f3a LF	5
eb032b98	6	Copyright (c) 2007 Michael Buesch <m@bues.ch>
93bb7f3a LF	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
93bb7f3a LF	25	#include "radio.h"
	26	#include "b43legacy.h"
	27
	28
6be50837	29	/* Returns TRUE, if the radio is enabled in hardware. */
f41f3f37	30	bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
93bb7f3a	31	{
21e731a1	32	if (dev->dev->id.revision >= 3) {
6be50837 LF	33	if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
	34	& B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
	35	return 1;
	36	} else {
316a4d96 LF	37	/* To prevent CPU fault on PPC, do not read a register
	38	* unless the interface is started; however, on resume
	39	* for hibernation, this routine is entered early. When
	40	* that happens, unconditionally return TRUE.
	41	*/
	42	if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
	43	return 1;
6be50837 LF	44	if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
	45	& B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
	46	return 1;
93bb7f3a	47	}
6be50837	48	return 0;
93bb7f3a LF	49	}
93bb7f3a LF	50
6be50837	51	/* The poll callback for the hardware button. */
f41f3f37	52	void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
93bb7f3a	53	{
f41f3f37 JB	54	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
	55	struct b43legacy_wldev *dev = wl->current_dev;
	56	struct ssb_bus *bus = dev->dev->bus;
6be50837	57	bool enabled;
f41f3f37	58	bool brought_up = false;
93bb7f3a	59
6be50837	60	mutex_lock(&wl->mutex);
4ad36d78	61	if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
f41f3f37 JB	62	if (ssb_bus_powerup(bus, 0)) {
	63	mutex_unlock(&wl->mutex);
	64	return;
	65	}
	66	ssb_device_enable(dev->dev, 0);
	67	brought_up = true;
4ad36d78	68	}
f41f3f37	69
6be50837	70	enabled = b43legacy_is_hw_radio_enabled(dev);
f41f3f37	71
6be50837 LF	72	if (unlikely(enabled != dev->radio_hw_enable)) {
	73	dev->radio_hw_enable = enabled;
	74	b43legacyinfo(wl, "Radio hardware status changed to %s\n",
	75	enabled ? "ENABLED" : "DISABLED");
f41f3f37	76	wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
19d337df JB	77	if (enabled != dev->phy.radio_on) {
	78	if (enabled)
	79	b43legacy_radio_turn_on(dev);
	80	else
	81	b43legacy_radio_turn_off(dev, 0);
	82	}
db9683fb	83	}
93bb7f3a	84
f41f3f37 JB	85	if (brought_up) {
	86	ssb_device_disable(dev->dev, 0);
	87	ssb_bus_may_powerdown(bus);
93bb7f3a LF	88	}
93bb7f3a LF	89
93bb7f3a	90	mutex_unlock(&wl->mutex);
93bb7f3a	91	}