--- /dev/null
+/*
+ * Atheros CARL9170 driver
+ *
+ * LED handling
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, 2010, Christian Lamparer <chunkeey@googlemail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "carl9170.h"
+#include "cmd.h"
+
+int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state)
+{
+ return carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_DATA, led_state);
+}
+
+int carl9170_led_init(struct ar9170 *ar)
+{
+ int err;
+
+ /* disable LEDs */
+ /* GPIO [0/1 mode: output, 2/3: input] */
+ err = carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
+ if (err)
+ goto out;
+
+ /* GPIO 0/1 value: off */
+ err = carl9170_led_set_state(ar, 0);
+
+out:
+ return err;
+}
+
+#ifdef CONFIG_CARL9170_LEDS
+static void carl9170_led_update(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
+ int i, tmp = 300, blink_delay = 1000;
+ u32 led_val = 0;
+ bool rerun = false;
+
+ if (!IS_ACCEPTING_CMD(ar))
+ return;
+
+ mutex_lock(&ar->mutex);
+ for (i = 0; i < AR9170_NUM_LEDS; i++) {
+ if (ar->leds[i].registered) {
+ if (ar->leds[i].last_state ||
+ ar->leds[i].toggled) {
+
+ if (ar->leds[i].toggled)
+ tmp = 70 + 200 / (ar->leds[i].toggled);
+
+ if (tmp < blink_delay)
+ blink_delay = tmp;
+
+ led_val |= 1 << i;
+ ar->leds[i].toggled = 0;
+ rerun = true;
+ }
+ }
+ }
+
+ carl9170_led_set_state(ar, led_val);
+ mutex_unlock(&ar->mutex);
+
+ if (!rerun)
+ return;
+
+ ieee80211_queue_delayed_work(ar->hw,
+ &ar->led_work,
+ msecs_to_jiffies(blink_delay));
+}
+
+static void carl9170_led_set_brightness(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct carl9170_led *arl = container_of(led, struct carl9170_led, l);
+ struct ar9170 *ar = arl->ar;
+
+ if (!arl->registered)
+ return;
+
+ if (arl->last_state != !!brightness) {
+ arl->toggled++;
+ arl->last_state = !!brightness;
+ }
+
+ if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
+ ieee80211_queue_delayed_work(ar->hw, &ar->led_work, HZ/10);
+}
+
+static int carl9170_led_register_led(struct ar9170 *ar, int i, char *name,
+ char *trigger)
+{
+ int err;
+
+ snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
+ "carl9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
+
+ ar->leds[i].ar = ar;
+ ar->leds[i].l.name = ar->leds[i].name;
+ ar->leds[i].l.brightness_set = carl9170_led_set_brightness;
+ ar->leds[i].l.brightness = 0;
+ ar->leds[i].l.default_trigger = trigger;
+
+ err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
+ &ar->leds[i].l);
+ if (err) {
+ wiphy_err(ar->hw->wiphy, "failed to register %s LED (%d).\n",
+ ar->leds[i].name, err);
+ } else {
+ ar->leds[i].registered = true;
+ }
+
+ return err;
+}
+
+void carl9170_led_unregister(struct ar9170 *ar)
+{
+ int i;
+
+ for (i = 0; i < AR9170_NUM_LEDS; i++)
+ if (ar->leds[i].registered) {
+ led_classdev_unregister(&ar->leds[i].l);
+ ar->leds[i].registered = false;
+ ar->leds[i].toggled = 0;
+ }
+
+ cancel_delayed_work_sync(&ar->led_work);
+}
+
+int carl9170_led_register(struct ar9170 *ar)
+{
+ int err;
+
+ INIT_DELAYED_WORK(&ar->led_work, carl9170_led_update);
+
+ err = carl9170_led_register_led(ar, 0, "tx",
+ ieee80211_get_tx_led_name(ar->hw));
+ if (err)
+ goto fail;
+
+ if (ar->features & CARL9170_ONE_LED)
+ return 0;
+
+ err = carl9170_led_register_led(ar, 1, "assoc",
+ ieee80211_get_assoc_led_name(ar->hw));
+ if (err)
+ goto fail;
+
+ return 0;
+
+fail:
+ carl9170_led_unregister(ar);
+ return err;
+}
+
+#endif /* CONFIG_CARL9170_LEDS */
projects / mv-sheeva.git / blobdiff