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. */
29 bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
30 {
31 if (dev->phy.rev >= 3) {
32 if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
33 & B43_MMIO_RADIO_HWENABLED_HI_MASK))
34 return 1;
35 } else {
36 if (b43_status(dev) >= B43_STAT_STARTED &&
37 b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
38 & B43_MMIO_RADIO_HWENABLED_LO_MASK)
39 return 1;
40 }
41 return 0;
42 }
43
44 /* The poll callback for the hardware button. */
45 void b43_rfkill_poll(struct ieee80211_hw *hw)
46 {
47 struct b43_wl *wl = hw_to_b43_wl(hw);
48 struct b43_wldev *dev = wl->current_dev;
49 struct ssb_bus *bus = dev->dev->bus;
50 bool enabled;
51 bool brought_up = false;
52
53 mutex_lock(&wl->mutex);
54 if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
55 if (ssb_bus_powerup(bus, 0)) {
56 mutex_unlock(&wl->mutex);
57 return;
58 }
59 ssb_device_enable(dev->dev, 0);
60 brought_up = true;
61 }
62
63 enabled = b43_is_hw_radio_enabled(dev);
64
65 if (unlikely(enabled != dev->radio_hw_enable)) {
66 dev->radio_hw_enable = enabled;
67 b43info(wl, "Radio hardware status changed to %s\n",
68 enabled ? "ENABLED" : "DISABLED");
69 wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
70 if (enabled != dev->phy.radio_on)
71 b43_software_rfkill(dev, !enabled);
72 }
73
74 if (brought_up) {
75 ssb_device_disable(dev->dev, 0);
76 ssb_bus_may_powerdown(bus);
77 }
78
79 mutex_unlock(&wl->mutex);
80 }
81
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