1 /*
2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 /*
22 Module: rt2x00rfkill
23 Abstract: rt2x00 rfkill routines.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/rfkill.h>
29
30 #include "rt2x00.h"
31 #include "rt2x00lib.h"
32
rt2x00rfkill_toggle_radio(void * data,enum rfkill_state state)33 static int rt2x00rfkill_toggle_radio(void *data, enum rfkill_state state)
34 {
35 struct rt2x00_dev *rt2x00dev = data;
36 int retval = 0;
37
38 if (unlikely(!rt2x00dev))
39 return 0;
40
41 /*
42 * Only continue if there are enabled interfaces.
43 */
44 if (!test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
45 return 0;
46
47 if (state == RFKILL_STATE_UNBLOCKED) {
48 INFO(rt2x00dev, "RFKILL event: enabling radio.\n");
49 clear_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags);
50 retval = rt2x00lib_enable_radio(rt2x00dev);
51 } else if (state == RFKILL_STATE_SOFT_BLOCKED) {
52 INFO(rt2x00dev, "RFKILL event: disabling radio.\n");
53 set_bit(DEVICE_STATE_DISABLED_RADIO_HW, &rt2x00dev->flags);
54 rt2x00lib_disable_radio(rt2x00dev);
55 } else {
56 WARNING(rt2x00dev, "RFKILL event: unknown state %d.\n", state);
57 }
58
59 return retval;
60 }
61
rt2x00rfkill_get_state(void * data,enum rfkill_state * state)62 static int rt2x00rfkill_get_state(void *data, enum rfkill_state *state)
63 {
64 struct rt2x00_dev *rt2x00dev = data;
65
66 /*
67 * rfkill_poll reports 1 when the key has been pressed and the
68 * radio should be blocked.
69 */
70 *state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev) ?
71 RFKILL_STATE_SOFT_BLOCKED : RFKILL_STATE_UNBLOCKED;
72
73 return 0;
74 }
75
rt2x00rfkill_poll(struct work_struct * work)76 static void rt2x00rfkill_poll(struct work_struct *work)
77 {
78 struct rt2x00_dev *rt2x00dev =
79 container_of(work, struct rt2x00_dev, rfkill_work.work);
80 enum rfkill_state state;
81
82 if (!test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state) ||
83 !test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
84 return;
85
86 /*
87 * Poll latest state and report it to rfkill who should sort
88 * out if the state should be toggled or not.
89 */
90 if (!rt2x00rfkill_get_state(rt2x00dev, &state))
91 rfkill_force_state(rt2x00dev->rfkill, state);
92
93 queue_delayed_work(rt2x00dev->hw->workqueue,
94 &rt2x00dev->rfkill_work, RFKILL_POLL_INTERVAL);
95 }
96
rt2x00rfkill_register(struct rt2x00_dev * rt2x00dev)97 void rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
98 {
99 if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state) ||
100 test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state))
101 return;
102
103 if (rfkill_register(rt2x00dev->rfkill)) {
104 ERROR(rt2x00dev, "Failed to register rfkill handler.\n");
105 return;
106 }
107
108 __set_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state);
109
110 /*
111 * Force initial poll which will detect the initial device state,
112 * and correctly sends the signal to the rfkill layer about this
113 * state.
114 */
115 rt2x00rfkill_poll(&rt2x00dev->rfkill_work.work);
116 }
117
rt2x00rfkill_unregister(struct rt2x00_dev * rt2x00dev)118 void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
119 {
120 if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state) ||
121 !test_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state))
122 return;
123
124 cancel_delayed_work_sync(&rt2x00dev->rfkill_work);
125
126 rfkill_unregister(rt2x00dev->rfkill);
127
128 __clear_bit(RFKILL_STATE_REGISTERED, &rt2x00dev->rfkill_state);
129 }
130
rt2x00rfkill_allocate(struct rt2x00_dev * rt2x00dev)131 void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
132 {
133 struct device *dev = wiphy_dev(rt2x00dev->hw->wiphy);
134
135 if (test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))
136 return;
137
138 rt2x00dev->rfkill = rfkill_allocate(dev, RFKILL_TYPE_WLAN);
139 if (!rt2x00dev->rfkill) {
140 ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");
141 return;
142 }
143
144 __set_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state);
145
146 rt2x00dev->rfkill->name = rt2x00dev->ops->name;
147 rt2x00dev->rfkill->data = rt2x00dev;
148 rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;
149 if (test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags)) {
150 rt2x00dev->rfkill->get_state = rt2x00rfkill_get_state;
151 rt2x00dev->rfkill->state =
152 rt2x00dev->ops->lib->rfkill_poll(rt2x00dev) ?
153 RFKILL_STATE_SOFT_BLOCKED : RFKILL_STATE_UNBLOCKED;
154 } else {
155 rt2x00dev->rfkill->state = RFKILL_STATE_UNBLOCKED;
156 }
157
158 INIT_DELAYED_WORK(&rt2x00dev->rfkill_work, rt2x00rfkill_poll);
159
160 return;
161 }
162
rt2x00rfkill_free(struct rt2x00_dev * rt2x00dev)163 void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
164 {
165 if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state))
166 return;
167
168 cancel_delayed_work_sync(&rt2x00dev->rfkill_work);
169
170 rfkill_free(rt2x00dev->rfkill);
171 rt2x00dev->rfkill = NULL;
172 }
173