1 | /* |
2 | * Atheros CARL9170 driver |
3 | * |
4 | * LED handling |
5 | * |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
7 | * Copyright 2009, 2010, Christian Lamparer <chunkeey@googlemail.com> |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
13 | * |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | * GNU General Public License for more details. |
18 | * |
19 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; see the file COPYING. If not, see |
21 | * http://www.gnu.org/licenses/. |
22 | * |
23 | * This file incorporates work covered by the following copyright and |
24 | * permission notice: |
25 | * Copyright (c) 2007-2008 Atheros Communications, Inc. |
26 | * |
27 | * Permission to use, copy, modify, and/or distribute this software for any |
28 | * purpose with or without fee is hereby granted, provided that the above |
29 | * copyright notice and this permission notice appear in all copies. |
30 | * |
31 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
32 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
33 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
34 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
35 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
36 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
37 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
38 | */ |
39 | |
40 | #include "carl9170.h" |
41 | #include "cmd.h" |
42 | |
43 | int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state) |
44 | { |
45 | return carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_DATA, val: led_state); |
46 | } |
47 | |
48 | int carl9170_led_init(struct ar9170 *ar) |
49 | { |
50 | int err; |
51 | |
52 | /* disable LEDs */ |
53 | /* GPIO [0/1 mode: output, 2/3: input] */ |
54 | err = carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, val: 3); |
55 | if (err) |
56 | goto out; |
57 | |
58 | /* GPIO 0/1 value: off */ |
59 | err = carl9170_led_set_state(ar, led_state: 0); |
60 | |
61 | out: |
62 | return err; |
63 | } |
64 | |
65 | #ifdef CONFIG_CARL9170_LEDS |
66 | static void carl9170_led_update(struct work_struct *work) |
67 | { |
68 | struct ar9170 *ar = container_of(work, struct ar9170, led_work.work); |
69 | int i, tmp = 300, blink_delay = 1000; |
70 | u32 led_val = 0; |
71 | bool rerun = false; |
72 | |
73 | if (!IS_ACCEPTING_CMD(ar)) |
74 | return; |
75 | |
76 | mutex_lock(&ar->mutex); |
77 | for (i = 0; i < AR9170_NUM_LEDS; i++) { |
78 | if (ar->leds[i].registered) { |
79 | if (ar->leds[i].last_state || |
80 | ar->leds[i].toggled) { |
81 | |
82 | if (ar->leds[i].toggled) |
83 | tmp = 70 + 200 / (ar->leds[i].toggled); |
84 | |
85 | if (tmp < blink_delay) |
86 | blink_delay = tmp; |
87 | |
88 | led_val |= 1 << i; |
89 | ar->leds[i].toggled = 0; |
90 | rerun = true; |
91 | } |
92 | } |
93 | } |
94 | |
95 | carl9170_led_set_state(ar, led_state: led_val); |
96 | mutex_unlock(lock: &ar->mutex); |
97 | |
98 | if (!rerun) |
99 | return; |
100 | |
101 | ieee80211_queue_delayed_work(hw: ar->hw, |
102 | dwork: &ar->led_work, |
103 | delay: msecs_to_jiffies(m: blink_delay)); |
104 | } |
105 | |
106 | static void carl9170_led_set_brightness(struct led_classdev *led, |
107 | enum led_brightness brightness) |
108 | { |
109 | struct carl9170_led *arl = container_of(led, struct carl9170_led, l); |
110 | struct ar9170 *ar = arl->ar; |
111 | |
112 | if (!arl->registered) |
113 | return; |
114 | |
115 | if (arl->last_state != !!brightness) { |
116 | arl->toggled++; |
117 | arl->last_state = !!brightness; |
118 | } |
119 | |
120 | if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled)) |
121 | ieee80211_queue_delayed_work(hw: ar->hw, dwork: &ar->led_work, HZ / 10); |
122 | } |
123 | |
124 | static int carl9170_led_register_led(struct ar9170 *ar, int i, char *name, |
125 | const char *trigger) |
126 | { |
127 | int err; |
128 | |
129 | snprintf(buf: ar->leds[i].name, size: sizeof(ar->leds[i].name), |
130 | fmt: "carl9170-%s::%s" , wiphy_name(wiphy: ar->hw->wiphy), name); |
131 | |
132 | ar->leds[i].ar = ar; |
133 | ar->leds[i].l.name = ar->leds[i].name; |
134 | ar->leds[i].l.brightness_set = carl9170_led_set_brightness; |
135 | ar->leds[i].l.brightness = 0; |
136 | ar->leds[i].l.default_trigger = trigger; |
137 | |
138 | err = led_classdev_register(parent: wiphy_dev(wiphy: ar->hw->wiphy), |
139 | led_cdev: &ar->leds[i].l); |
140 | if (err) { |
141 | wiphy_err(ar->hw->wiphy, "failed to register %s LED (%d).\n" , |
142 | ar->leds[i].name, err); |
143 | } else { |
144 | ar->leds[i].registered = true; |
145 | } |
146 | |
147 | return err; |
148 | } |
149 | |
150 | void carl9170_led_unregister(struct ar9170 *ar) |
151 | { |
152 | int i; |
153 | |
154 | for (i = 0; i < AR9170_NUM_LEDS; i++) |
155 | if (ar->leds[i].registered) { |
156 | led_classdev_unregister(led_cdev: &ar->leds[i].l); |
157 | ar->leds[i].registered = false; |
158 | ar->leds[i].toggled = 0; |
159 | } |
160 | |
161 | cancel_delayed_work_sync(dwork: &ar->led_work); |
162 | } |
163 | |
164 | int carl9170_led_register(struct ar9170 *ar) |
165 | { |
166 | int err; |
167 | |
168 | INIT_DELAYED_WORK(&ar->led_work, carl9170_led_update); |
169 | |
170 | err = carl9170_led_register_led(ar, i: 0, name: "tx" , |
171 | trigger: ieee80211_get_tx_led_name(hw: ar->hw)); |
172 | if (err) |
173 | goto fail; |
174 | |
175 | if (ar->features & CARL9170_ONE_LED) |
176 | return 0; |
177 | |
178 | err = carl9170_led_register_led(ar, i: 1, name: "assoc" , |
179 | trigger: ieee80211_get_assoc_led_name(hw: ar->hw)); |
180 | if (err) |
181 | goto fail; |
182 | |
183 | return 0; |
184 | |
185 | fail: |
186 | carl9170_led_unregister(ar); |
187 | return err; |
188 | } |
189 | |
190 | #endif /* CONFIG_CARL9170_LEDS */ |
191 | |