1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun Broadcom B43 wireless driver
5*4882a593Smuzhiyun RFKILL support
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun Copyright (c) 2007 Michael Buesch <m@bues.ch>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "radio.h"
13*4882a593Smuzhiyun #include "b43legacy.h"
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun /* Returns TRUE, if the radio is enabled in hardware. */
b43legacy_is_hw_radio_enabled(struct b43legacy_wldev * dev)17*4882a593Smuzhiyun bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun if (dev->dev->id.revision >= 3) {
20*4882a593Smuzhiyun if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
21*4882a593Smuzhiyun & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
22*4882a593Smuzhiyun return true;
23*4882a593Smuzhiyun } else {
24*4882a593Smuzhiyun /* To prevent CPU fault on PPC, do not read a register
25*4882a593Smuzhiyun * unless the interface is started; however, on resume
26*4882a593Smuzhiyun * for hibernation, this routine is entered early. When
27*4882a593Smuzhiyun * that happens, unconditionally return TRUE.
28*4882a593Smuzhiyun */
29*4882a593Smuzhiyun if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
30*4882a593Smuzhiyun return true;
31*4882a593Smuzhiyun if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
32*4882a593Smuzhiyun & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
33*4882a593Smuzhiyun return true;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun return false;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun /* The poll callback for the hardware button. */
b43legacy_rfkill_poll(struct ieee80211_hw * hw)39*4882a593Smuzhiyun void b43legacy_rfkill_poll(struct ieee80211_hw *hw)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
42*4882a593Smuzhiyun struct b43legacy_wldev *dev = wl->current_dev;
43*4882a593Smuzhiyun struct ssb_bus *bus = dev->dev->bus;
44*4882a593Smuzhiyun bool enabled;
45*4882a593Smuzhiyun bool brought_up = false;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun mutex_lock(&wl->mutex);
48*4882a593Smuzhiyun if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
49*4882a593Smuzhiyun if (ssb_bus_powerup(bus, 0)) {
50*4882a593Smuzhiyun mutex_unlock(&wl->mutex);
51*4882a593Smuzhiyun return;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun ssb_device_enable(dev->dev, 0);
54*4882a593Smuzhiyun brought_up = true;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun enabled = b43legacy_is_hw_radio_enabled(dev);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun if (unlikely(enabled != dev->radio_hw_enable)) {
60*4882a593Smuzhiyun dev->radio_hw_enable = enabled;
61*4882a593Smuzhiyun b43legacyinfo(wl, "Radio hardware status changed to %s\n",
62*4882a593Smuzhiyun enabled ? "ENABLED" : "DISABLED");
63*4882a593Smuzhiyun wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
64*4882a593Smuzhiyun if (enabled != dev->phy.radio_on) {
65*4882a593Smuzhiyun if (enabled)
66*4882a593Smuzhiyun b43legacy_radio_turn_on(dev);
67*4882a593Smuzhiyun else
68*4882a593Smuzhiyun b43legacy_radio_turn_off(dev, 0);
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun if (brought_up) {
73*4882a593Smuzhiyun ssb_device_disable(dev->dev, 0);
74*4882a593Smuzhiyun ssb_bus_may_powerdown(bus);
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun mutex_unlock(&wl->mutex);
78*4882a593Smuzhiyun }
79