• Home
  • History
  • Annotate
  • Line#
  • Navigate
  • Raw
  • Download
  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/linux/linux-2.6/drivers/net/wireless/b43/
1/*
2
3  Broadcom B43 wireless driver
4  RFKILL support
5
6  Copyright (c) 2007 Michael Buesch <mb@bu3sch.de>
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
25#include "b43.h"
26
27
28/* Returns TRUE, if the radio is enabled in hardware. */
29bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
30{
31	if (dev->phy.rev >= 3 || dev->phy.type == B43_PHYTYPE_LP) {
32		if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
33		      & B43_MMIO_RADIO_HWENABLED_HI_MASK))
34			return 1;
35	} else {
36		/* To prevent CPU fault on PPC, do not read a register
37		 * unless the interface is started; however, on resume
38		 * for hibernation, this routine is entered early. When
39		 * that happens, unconditionally return TRUE.
40		 */
41		if (b43_status(dev) < B43_STAT_STARTED)
42			return 1;
43		if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
44		    & B43_MMIO_RADIO_HWENABLED_LO_MASK)
45			return 1;
46	}
47	return 0;
48}
49
50/* The poll callback for the hardware button. */
51void b43_rfkill_poll(struct ieee80211_hw *hw)
52{
53	struct b43_wl *wl = hw_to_b43_wl(hw);
54	struct b43_wldev *dev = wl->current_dev;
55	struct ssb_bus *bus = dev->dev->bus;
56	bool enabled;
57	bool brought_up = false;
58
59	mutex_lock(&wl->mutex);
60	if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
61		if (ssb_bus_powerup(bus, 0)) {
62			mutex_unlock(&wl->mutex);
63			return;
64		}
65		ssb_device_enable(dev->dev, 0);
66		brought_up = true;
67	}
68
69	enabled = b43_is_hw_radio_enabled(dev);
70
71	if (unlikely(enabled != dev->radio_hw_enable)) {
72		dev->radio_hw_enable = enabled;
73		b43info(wl, "Radio hardware status changed to %s\n",
74			enabled ? "ENABLED" : "DISABLED");
75		wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
76		if (enabled != dev->phy.radio_on)
77			b43_software_rfkill(dev, !enabled);
78	}
79
80	if (brought_up) {
81		ssb_device_disable(dev->dev, 0);
82		ssb_bus_may_powerdown(bus);
83	}
84
85	mutex_unlock(&wl->mutex);
86}
87