1 files changed, 190 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/carl9170/led.c b/drivers/net/wireless/ath/carl9170/led.c
new file mode 100644
index 000000000000..4bb2cbd8bd9b
--- /dev/null
+++ b/drivers/net/wireless/ath/carl9170/led.c
@@ -0,0 +1,190 @@
+/*
+ * 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 */