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 "radio.h"
26 #include "b43legacy.h"
27
28
29 /* Returns TRUE, if the radio is enabled in hardware. */
30 bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
31 {
32 if (dev->phy.rev >= 3) {
33 if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
34 & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
35 return 1;
36 } else {
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;
44 if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
45 & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
46 return 1;
47 }
48 return 0;
49 }
50
51 /* The poll callback for the hardware button. */
52 void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
53 {
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;
57 bool enabled;
58 bool brought_up = false;
59
60 mutex_lock(&wl->mutex);
61 if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
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;
68 }
69
70 enabled = b43legacy_is_hw_radio_enabled(dev);
71
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");
76 wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
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 }
83 }
84
85 if (brought_up) {
86 ssb_device_disable(dev->dev, 0);
87 ssb_bus_may_powerdown(bus);
88 }
89
90 mutex_unlock(&wl->mutex);
91 }
92
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