clocks: tegra12: Use static CPU-EMC co-relation
[linux-3.10.git] / drivers / net / wireless / p54 / led.c
1 /*
2  * Common code for mac80211 Prism54 drivers
3  *
4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
5  * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7  *
8  * Based on:
9  * - the islsm (softmac prism54) driver, which is:
10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
11  * - stlc45xx driver
12  *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
13  *
14  * This program is free software; you can redistribute it and/or modify
15  * it under the terms of the GNU General Public License version 2 as
16  * published by the Free Software Foundation.
17  */
18
19 #include <linux/init.h>
20 #include <linux/firmware.h>
21 #include <linux/etherdevice.h>
22
23 #include <net/mac80211.h>
24 #ifdef CONFIG_P54_LEDS
25 #include <linux/leds.h>
26 #endif /* CONFIG_P54_LEDS */
27
28 #include "p54.h"
29 #include "lmac.h"
30
31 static void p54_update_leds(struct work_struct *work)
32 {
33         struct p54_common *priv = container_of(work, struct p54_common,
34                                                led_work.work);
35         int err, i, tmp, blink_delay = 400;
36         bool rerun = false;
37
38         /* Don't toggle the LED, when the device is down. */
39         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
40                 return ;
41
42         for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
43                 if (priv->leds[i].toggled) {
44                         priv->softled_state |= BIT(i);
45
46                         tmp = 70 + 200 / (priv->leds[i].toggled);
47                         if (tmp < blink_delay)
48                                 blink_delay = tmp;
49
50                         if (priv->leds[i].led_dev.brightness == LED_OFF)
51                                 rerun = true;
52
53                         priv->leds[i].toggled =
54                                 !!priv->leds[i].led_dev.brightness;
55                 } else
56                         priv->softled_state &= ~BIT(i);
57
58         err = p54_set_leds(priv);
59         if (err && net_ratelimit())
60                 wiphy_err(priv->hw->wiphy,
61                           "failed to update LEDs (%d).\n", err);
62
63         if (rerun)
64                 ieee80211_queue_delayed_work(priv->hw, &priv->led_work,
65                         msecs_to_jiffies(blink_delay));
66 }
67
68 static void p54_led_brightness_set(struct led_classdev *led_dev,
69                                    enum led_brightness brightness)
70 {
71         struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev,
72                                                led_dev);
73         struct ieee80211_hw *dev = led->hw_dev;
74         struct p54_common *priv = dev->priv;
75
76         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
77                 return ;
78
79         if ((brightness) && (led->registered)) {
80                 led->toggled++;
81                 ieee80211_queue_delayed_work(priv->hw, &priv->led_work, HZ/10);
82         }
83 }
84
85 static int p54_register_led(struct p54_common *priv,
86                             unsigned int led_index,
87                             char *name, char *trigger)
88 {
89         struct p54_led_dev *led = &priv->leds[led_index];
90         int err;
91
92         if (led->registered)
93                 return -EEXIST;
94
95         snprintf(led->name, sizeof(led->name), "p54-%s::%s",
96                  wiphy_name(priv->hw->wiphy), name);
97         led->hw_dev = priv->hw;
98         led->index = led_index;
99         led->led_dev.name = led->name;
100         led->led_dev.default_trigger = trigger;
101         led->led_dev.brightness_set = p54_led_brightness_set;
102
103         err = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_dev);
104         if (err)
105                 wiphy_err(priv->hw->wiphy,
106                           "Failed to register %s LED.\n", name);
107         else
108                 led->registered = 1;
109
110         return err;
111 }
112
113 int p54_init_leds(struct p54_common *priv)
114 {
115         int err;
116
117         /*
118          * TODO:
119          * Figure out if the EEPROM contains some hints about the number
120          * of available/programmable LEDs of the device.
121          */
122
123         INIT_DELAYED_WORK(&priv->led_work, p54_update_leds);
124
125         err = p54_register_led(priv, 0, "assoc",
126                                ieee80211_get_assoc_led_name(priv->hw));
127         if (err)
128                 return err;
129
130         err = p54_register_led(priv, 1, "tx",
131                                ieee80211_get_tx_led_name(priv->hw));
132         if (err)
133                 return err;
134
135         err = p54_register_led(priv, 2, "rx",
136                                ieee80211_get_rx_led_name(priv->hw));
137         if (err)
138                 return err;
139
140         err = p54_register_led(priv, 3, "radio",
141                                ieee80211_get_radio_led_name(priv->hw));
142         if (err)
143                 return err;
144
145         err = p54_set_leds(priv);
146         return err;
147 }
148
149 void p54_unregister_leds(struct p54_common *priv)
150 {
151         int i;
152
153         for (i = 0; i < ARRAY_SIZE(priv->leds); i++) {
154                 if (priv->leds[i].registered) {
155                         priv->leds[i].registered = false;
156                         priv->leds[i].toggled = 0;
157                         led_classdev_unregister(&priv->leds[i].led_dev);
158                 }
159         }
160
161         cancel_delayed_work_sync(&priv->led_work);
162 }