rt2x00: Remove redundant code in rfkill setup
[linux-2.6.git] / drivers / net / wireless / rt2x00 / rt2x00rfkill.c
1 /*
2         Copyright (C) 2004 - 2007 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/input-polldev.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/rfkill.h>
30
31 #include "rt2x00.h"
32 #include "rt2x00lib.h"
33
34 static int rt2x00rfkill_toggle_radio(void *data, enum rfkill_state state)
35 {
36         struct rt2x00_dev *rt2x00dev = data;
37         int retval = 0;
38
39         if (unlikely(!rt2x00dev))
40                 return 0;
41
42         /*
43          * Only continue if there are enabled interfaces.
44          */
45         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
46                 return 0;
47
48         if (state == RFKILL_STATE_ON) {
49                 INFO(rt2x00dev, "Hardware button pressed, enabling radio.\n");
50                 __clear_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags);
51                 retval = rt2x00lib_enable_radio(rt2x00dev);
52         } else if (state == RFKILL_STATE_OFF) {
53                 INFO(rt2x00dev, "Hardware button pressed, disabling radio.\n");
54                 __set_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags);
55                 rt2x00lib_disable_radio(rt2x00dev);
56         }
57
58         return retval;
59 }
60
61 static void rt2x00rfkill_poll(struct input_polled_dev *poll_dev)
62 {
63         struct rt2x00_dev *rt2x00dev = poll_dev->private;
64         int state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
65
66         if (rt2x00dev->rfkill->state != state) {
67                 input_report_key(poll_dev->input, KEY_WLAN, 1);
68                 input_report_key(poll_dev->input, KEY_WLAN, 0);
69         }
70 }
71
72 int rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
73 {
74         int retval;
75
76         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
77                 return 0;
78
79         retval = rfkill_register(rt2x00dev->rfkill);
80         if (retval) {
81                 ERROR(rt2x00dev, "Failed to register rfkill handler.\n");
82                 return retval;
83         }
84
85         retval = input_register_polled_device(rt2x00dev->poll_dev);
86         if (retval) {
87                 ERROR(rt2x00dev, "Failed to register polled device.\n");
88                 rfkill_unregister(rt2x00dev->rfkill);
89                 return retval;
90         }
91
92         /*
93          * Force initial poll which will detect the initial device state,
94          * and correctly sends the signal to the rfkill layer about this
95          * state.
96          */
97         rt2x00rfkill_poll(rt2x00dev->poll_dev);
98
99         return 0;
100 }
101
102 void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
103 {
104         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
105                 return;
106
107         input_unregister_polled_device(rt2x00dev->poll_dev);
108         rfkill_unregister(rt2x00dev->rfkill);
109 }
110
111 int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
112 {
113         struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
114
115         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
116                 return 0;
117
118         rt2x00dev->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
119         if (!rt2x00dev->rfkill) {
120                 ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");
121                 goto exit;
122         }
123
124         rt2x00dev->rfkill->name = rt2x00dev->ops->name;
125         rt2x00dev->rfkill->data = rt2x00dev;
126         rt2x00dev->rfkill->state = -1;
127         rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;
128
129         rt2x00dev->poll_dev = input_allocate_polled_device();
130         if (!rt2x00dev->poll_dev) {
131                 ERROR(rt2x00dev, "Failed to allocate polled device.\n");
132                 goto exit_free_rfkill;
133         }
134
135         rt2x00dev->poll_dev->private = rt2x00dev;
136         rt2x00dev->poll_dev->poll = rt2x00rfkill_poll;
137         rt2x00dev->poll_dev->poll_interval = RFKILL_POLL_INTERVAL;
138
139         rt2x00dev->poll_dev->input->name = rt2x00dev->ops->name;
140         rt2x00dev->poll_dev->input->phys = wiphy_name(rt2x00dev->hw->wiphy);
141         rt2x00dev->poll_dev->input->id.bustype = BUS_HOST;
142         rt2x00dev->poll_dev->input->id.vendor = 0x1814;
143         rt2x00dev->poll_dev->input->id.product = rt2x00dev->chip.rt;
144         rt2x00dev->poll_dev->input->id.version = rt2x00dev->chip.rev;
145         rt2x00dev->poll_dev->input->dev.parent = device;
146         rt2x00dev->poll_dev->input->evbit[0] = BIT(EV_KEY);
147         set_bit(KEY_WLAN, rt2x00dev->poll_dev->input->keybit);
148
149         return 0;
150
151 exit_free_polldev:
152         input_free_polled_device(rt2x00dev->poll_dev);
153
154 exit_free_rfkill:
155         rfkill_free(rt2x00dev->rfkill);
156
157 exit:
158         return -ENOMEM;
159 }
160
161 void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
162 {
163         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
164                 return;
165
166         input_free_device(rt2x00dev->poll_dev->input);
167         input_free_polled_device(rt2x00dev->poll_dev);
168         rfkill_free(rt2x00dev->rfkill);
169 }