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Diffstat (limited to 'drivers/net/wireless/b43/rfkill.c')
-rw-r--r--drivers/net/wireless/b43/rfkill.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/rfkill.c b/drivers/net/wireless/b43/rfkill.c
new file mode 100644
index 000000000000..c25fd9956a9c
--- /dev/null
+++ b/drivers/net/wireless/b43/rfkill.c
@@ -0,0 +1,155 @@
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 "rfkill.h"
26#include "b43.h"
27
28
29static void b43_notify_rfkill_press(struct work_struct *work)
30{
31 struct b43_rfkill *rfk = container_of(work, struct b43_rfkill,
32 notify_work);
33 struct b43_wl *wl = container_of(rfk, struct b43_wl, rfkill);
34 struct b43_wldev *dev;
35 enum rfkill_state state;
36
37 mutex_lock(&wl->mutex);
38 dev = wl->current_dev;
39 if (b43_status(dev) < B43_STAT_INITIALIZED) {
40 mutex_unlock(&wl->mutex);
41 return;
42 }
43 if (dev->radio_hw_enable)
44 state = RFKILL_STATE_ON;
45 else
46 state = RFKILL_STATE_OFF;
47 b43info(wl, "Radio hardware status changed to %s\n",
48 dev->radio_hw_enable ? "ENABLED" : "DISABLED");
49 mutex_unlock(&wl->mutex);
50
51 if (rfk->rfkill) {
52 /* Be careful. This calls back into the software toggle routines.
53 * So we must unlock before calling. */
54 rfkill_switch_all(rfk->rfkill->type, state);
55 }
56}
57
58/* Called when the RFKILL toggled in hardware.
59 * This is called with the mutex locked. */
60void b43_rfkill_toggled(struct b43_wldev *dev, bool on)
61{
62 struct b43_wl *wl = dev->wl;
63
64 B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED);
65 /* Update the RF status asynchronously, as rfkill will
66 * call back into the software toggle handler.
67 * This would deadlock if done synchronously. */
68 queue_work(wl->hw->workqueue, &wl->rfkill.notify_work);
69}
70
71/* Called when the RFKILL toggled in software.
72 * This is called without locking. */
73static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
74{
75 struct b43_wldev *dev = data;
76 struct b43_wl *wl = dev->wl;
77 int err = 0;
78
79 mutex_lock(&wl->mutex);
80 if (b43_status(dev) < B43_STAT_INITIALIZED)
81 goto out_unlock;
82
83 switch (state) {
84 case RFKILL_STATE_ON:
85 if (!dev->radio_hw_enable) {
86 /* No luck. We can't toggle the hardware RF-kill
87 * button from software. */
88 err = -EBUSY;
89 goto out_unlock;
90 }
91 if (!dev->phy.radio_on)
92 b43_radio_turn_on(dev);
93 break;
94 case RFKILL_STATE_OFF:
95 if (dev->phy.radio_on)
96 b43_radio_turn_off(dev, 0);
97 break;
98 }
99
100out_unlock:
101 mutex_unlock(&wl->mutex);
102
103 return err;
104}
105
106char * b43_rfkill_led_name(struct b43_wldev *dev)
107{
108 struct b43_wl *wl = dev->wl;
109
110 if (!wl->rfkill.rfkill)
111 return NULL;
112 return rfkill_get_led_name(wl->rfkill.rfkill);
113}
114
115void b43_rfkill_init(struct b43_wldev *dev)
116{
117 struct b43_wl *wl = dev->wl;
118 struct b43_rfkill *rfk = &(wl->rfkill);
119 int err;
120
121 snprintf(rfk->name, sizeof(rfk->name),
122 "b43-%s", wiphy_name(wl->hw->wiphy));
123 rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
124 if (!rfk->rfkill)
125 goto error;
126 rfk->rfkill->name = rfk->name;
127 rfk->rfkill->state = RFKILL_STATE_ON;
128 rfk->rfkill->data = dev;
129 rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
130 rfk->rfkill->user_claim_unsupported = 1;
131
132 INIT_WORK(&rfk->notify_work, b43_notify_rfkill_press);
133
134 err = rfkill_register(rfk->rfkill);
135 if (err)
136 goto error;
137
138 return;
139error:
140 b43warn(dev->wl, "Failed to initialize the RF-kill button\n");
141 rfkill_free(rfk->rfkill);
142 rfk->rfkill = NULL;
143}
144
145void b43_rfkill_exit(struct b43_wldev *dev)
146{
147 struct b43_rfkill *rfk = &(dev->wl->rfkill);
148
149 if (!rfk->rfkill)
150 return;
151 cancel_work_sync(&rfk->notify_work);
152 rfkill_unregister(rfk->rfkill);
153 rfkill_free(rfk->rfkill);
154 rfk->rfkill = NULL;
155}