2 * Atheros AR9170 driver
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; see the file COPYING. If not, see
20 * http://www.gnu.org/licenses/.
22 * This file incorporates work covered by the following copyright and
24 * Copyright (c) 2007-2008 Atheros Communications, Inc.
26 * Permission to use, copy, modify, and/or distribute this software for any
27 * purpose with or without fee is hereby granted, provided that the above
28 * copyright notice and this permission notice appear in all copies.
30 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
31 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
32 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
33 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
34 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
35 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
36 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
42 int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state)
44 return ar9170_write_reg(ar, AR9170_GPIO_REG_DATA, led_state);
47 int ar9170_init_leds(struct ar9170 *ar)
52 /* GPIO [0/1 mode: output, 2/3: input] */
53 err = ar9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
57 /* GPIO 0/1 value: off */
58 err = ar9170_set_leds_state(ar, 0);
64 #ifdef CONFIG_AR9170_LEDS
65 static void ar9170_update_leds(struct work_struct *work)
67 struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
68 int i, tmp, blink_delay = 1000;
72 if (unlikely(!IS_ACCEPTING_CMD(ar)))
75 mutex_lock(&ar->mutex);
76 for (i = 0; i < AR9170_NUM_LEDS; i++)
77 if (ar->leds[i].toggled) {
80 tmp = 70 + 200 / (ar->leds[i].toggled);
81 if (tmp < blink_delay)
84 if (ar->leds[i].toggled > 1)
85 ar->leds[i].toggled = 0;
90 ar9170_set_leds_state(ar, led_val);
91 mutex_unlock(&ar->mutex);
94 queue_delayed_work(ar->hw->workqueue, &ar->led_work,
95 msecs_to_jiffies(blink_delay));
98 static void ar9170_led_brightness_set(struct led_classdev *led,
99 enum led_brightness brightness)
101 struct ar9170_led *arl = container_of(led, struct ar9170_led, l);
102 struct ar9170 *ar = arl->ar;
106 if (likely(IS_ACCEPTING_CMD(ar) && brightness))
107 queue_delayed_work(ar->hw->workqueue, &ar->led_work, HZ/10);
110 static int ar9170_register_led(struct ar9170 *ar, int i, char *name,
115 snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
116 "ar9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
119 ar->leds[i].l.name = ar->leds[i].name;
120 ar->leds[i].l.brightness_set = ar9170_led_brightness_set;
121 ar->leds[i].l.brightness = 0;
122 ar->leds[i].l.default_trigger = trigger;
124 err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
127 printk(KERN_ERR "%s: failed to register %s LED (%d).\n",
128 wiphy_name(ar->hw->wiphy), ar->leds[i].name, err);
130 ar->leds[i].registered = true;
135 void ar9170_unregister_leds(struct ar9170 *ar)
139 cancel_delayed_work_sync(&ar->led_work);
141 for (i = 0; i < AR9170_NUM_LEDS; i++)
142 if (ar->leds[i].registered) {
143 led_classdev_unregister(&ar->leds[i].l);
144 ar->leds[i].registered = false;
148 int ar9170_register_leds(struct ar9170 *ar)
152 INIT_DELAYED_WORK(&ar->led_work, ar9170_update_leds);
154 err = ar9170_register_led(ar, 0, "tx",
155 ieee80211_get_tx_led_name(ar->hw));
159 err = ar9170_register_led(ar, 1, "assoc",
160 ieee80211_get_assoc_led_name(ar->hw));
167 ar9170_unregister_leds(ar);
171 #endif /* CONFIG_AR9170_LEDS */