]> err.no Git - linux-2.6/blob - drivers/net/wireless/rt2x00/rt2x00leds.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / drivers / net / wireless / rt2x00 / rt2x00leds.c
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: rt2x00lib
23         Abstract: rt2x00 led specific routines.
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28
29 #include "rt2x00.h"
30 #include "rt2x00lib.h"
31
32 void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi)
33 {
34         struct rt2x00_led *led = &rt2x00dev->led_qual;
35         unsigned int brightness;
36
37         if ((led->type != LED_TYPE_QUALITY) || !(led->flags & LED_REGISTERED))
38                 return;
39
40         /*
41          * Led handling requires a positive value for the rssi,
42          * to do that correctly we need to add the correction.
43          */
44         rssi += rt2x00dev->rssi_offset;
45
46         /*
47          * Get the rssi level, this is used to convert the rssi
48          * to a LED value inside the range LED_OFF - LED_FULL.
49          */
50         if (rssi <= 30)
51                 rssi = 0;
52         else if (rssi <= 39)
53                 rssi = 1;
54         else if (rssi <= 49)
55                 rssi = 2;
56         else if (rssi <= 53)
57                 rssi = 3;
58         else if (rssi <= 63)
59                 rssi = 4;
60         else
61                 rssi = 5;
62
63         /*
64          * Note that we must _not_ send LED_OFF since the driver
65          * is going to calculate the value and might use it in a
66          * division.
67          */
68         brightness = ((LED_FULL / 6) * rssi) + 1;
69         if (brightness != led->led_dev.brightness) {
70                 led->led_dev.brightness_set(&led->led_dev, brightness);
71                 led->led_dev.brightness = brightness;
72         }
73 }
74
75 void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled)
76 {
77         struct rt2x00_led *led = &rt2x00dev->led_assoc;
78         unsigned int brightness;
79
80         if ((led->type != LED_TYPE_ASSOC) || !(led->flags & LED_REGISTERED))
81                 return;
82
83         brightness = enabled ? LED_FULL : LED_OFF;
84         if (brightness != led->led_dev.brightness) {
85                 led->led_dev.brightness_set(&led->led_dev, brightness);
86                 led->led_dev.brightness = brightness;
87         }
88 }
89
90 void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled)
91 {
92         struct rt2x00_led *led = &rt2x00dev->led_radio;
93         unsigned int brightness;
94
95         if ((led->type != LED_TYPE_RADIO) || !(led->flags & LED_REGISTERED))
96                 return;
97
98         brightness = enabled ? LED_FULL : LED_OFF;
99         if (brightness != led->led_dev.brightness) {
100                 led->led_dev.brightness_set(&led->led_dev, brightness);
101                 led->led_dev.brightness = brightness;
102         }
103 }
104
105 static int rt2x00leds_register_led(struct rt2x00_dev *rt2x00dev,
106                                    struct rt2x00_led *led,
107                                    const char *name)
108 {
109         struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
110         int retval;
111
112         led->led_dev.name = name;
113
114         retval = led_classdev_register(device, &led->led_dev);
115         if (retval) {
116                 ERROR(rt2x00dev, "Failed to register led handler.\n");
117                 return retval;
118         }
119
120         led->flags |= LED_REGISTERED;
121
122         return 0;
123 }
124
125 void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
126 {
127         char dev_name[16];
128         char name[32];
129         int retval;
130         unsigned long on_period;
131         unsigned long off_period;
132
133         snprintf(dev_name, sizeof(dev_name), "%s-%s",
134                  rt2x00dev->ops->name, wiphy_name(rt2x00dev->hw->wiphy));
135
136         if (rt2x00dev->led_radio.flags & LED_INITIALIZED) {
137                 snprintf(name, sizeof(name), "%s:radio", dev_name);
138
139                 retval = rt2x00leds_register_led(rt2x00dev,
140                                                  &rt2x00dev->led_radio,
141                                                  name);
142                 if (retval)
143                         goto exit_fail;
144         }
145
146         if (rt2x00dev->led_assoc.flags & LED_INITIALIZED) {
147                 snprintf(name, sizeof(name), "%s:assoc", dev_name);
148
149                 retval = rt2x00leds_register_led(rt2x00dev,
150                                                  &rt2x00dev->led_assoc,
151                                                  name);
152                 if (retval)
153                         goto exit_fail;
154         }
155
156         if (rt2x00dev->led_qual.flags & LED_INITIALIZED) {
157                 snprintf(name, sizeof(name), "%s:quality", dev_name);
158
159                 retval = rt2x00leds_register_led(rt2x00dev,
160                                                  &rt2x00dev->led_qual,
161                                                  name);
162                 if (retval)
163                         goto exit_fail;
164         }
165
166         /*
167          * Initialize blink time to default value:
168          * On period: 70ms
169          * Off period: 30ms
170          */
171         if (rt2x00dev->led_radio.led_dev.blink_set) {
172                 on_period = 70;
173                 off_period = 30;
174                 rt2x00dev->led_radio.led_dev.blink_set(
175                     &rt2x00dev->led_radio.led_dev, &on_period, &off_period);
176         }
177
178         return;
179
180 exit_fail:
181         rt2x00leds_unregister(rt2x00dev);
182 }
183
184 static void rt2x00leds_unregister_led(struct rt2x00_led *led)
185 {
186         led_classdev_unregister(&led->led_dev);
187         led->led_dev.brightness_set(&led->led_dev, LED_OFF);
188         led->flags &= ~LED_REGISTERED;
189 }
190
191 void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
192 {
193         if (rt2x00dev->led_qual.flags & LED_REGISTERED)
194                 rt2x00leds_unregister_led(&rt2x00dev->led_qual);
195         if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
196                 rt2x00leds_unregister_led(&rt2x00dev->led_assoc);
197         if (rt2x00dev->led_radio.flags & LED_REGISTERED)
198                 rt2x00leds_unregister_led(&rt2x00dev->led_radio);
199 }
200
201 void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
202 {
203         if (rt2x00dev->led_qual.flags & LED_REGISTERED)
204                 led_classdev_suspend(&rt2x00dev->led_qual.led_dev);
205         if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
206                 led_classdev_suspend(&rt2x00dev->led_assoc.led_dev);
207         if (rt2x00dev->led_radio.flags & LED_REGISTERED)
208                 led_classdev_suspend(&rt2x00dev->led_radio.led_dev);
209 }
210
211 void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
212 {
213         if (rt2x00dev->led_radio.flags & LED_REGISTERED)
214                 led_classdev_resume(&rt2x00dev->led_radio.led_dev);
215         if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
216                 led_classdev_resume(&rt2x00dev->led_assoc.led_dev);
217         if (rt2x00dev->led_qual.flags & LED_REGISTERED)
218                 led_classdev_resume(&rt2x00dev->led_qual.led_dev);
219 }