/* * 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 */