diff options
Diffstat (limited to 'drivers/net/wireless/ath/ar9170/led.c')
| -rw-r--r-- | drivers/net/wireless/ath/ar9170/led.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ar9170/led.c b/drivers/net/wireless/ath/ar9170/led.c new file mode 100644 index 000000000000..63fda6cd2101 --- /dev/null +++ b/drivers/net/wireless/ath/ar9170/led.c @@ -0,0 +1,178 @@ +/* + * Atheros AR9170 driver + * + * LED handling + * + * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> + * + * 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 "ar9170.h" +#include "cmd.h" + +int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state) +{ + return ar9170_write_reg(ar, AR9170_GPIO_REG_DATA, led_state); +} + +int ar9170_init_leds(struct ar9170 *ar) +{ + int err; + + /* disable LEDs */ + /* GPIO [0/1 mode: output, 2/3: input] */ + err = ar9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3); + if (err) + goto out; + + /* GPIO 0/1 value: off */ + err = ar9170_set_leds_state(ar, 0); + +out: + return err; +} + +#ifdef CONFIG_AR9170_LEDS +static void ar9170_update_leds(struct work_struct *work) +{ + struct ar9170 *ar = container_of(work, struct ar9170, led_work.work); + int i, tmp, blink_delay = 1000; + u32 led_val = 0; + bool rerun = false; + + if (unlikely(!IS_ACCEPTING_CMD(ar))) + return ; + + mutex_lock(&ar->mutex); + for (i = 0; i < AR9170_NUM_LEDS; i++) + if (ar->leds[i].registered && ar->leds[i].toggled) { + led_val |= 1 << i; + + tmp = 70 + 200 / (ar->leds[i].toggled); + if (tmp < blink_delay) + blink_delay = tmp; + + if (ar->leds[i].toggled > 1) + ar->leds[i].toggled = 0; + + rerun = true; + } + + ar9170_set_leds_state(ar, led_val); + mutex_unlock(&ar->mutex); + + if (rerun) + queue_delayed_work(ar->hw->workqueue, &ar->led_work, + msecs_to_jiffies(blink_delay)); +} + +static void ar9170_led_brightness_set(struct led_classdev *led, + enum led_brightness brightness) +{ + struct ar9170_led *arl = container_of(led, struct ar9170_led, l); + struct ar9170 *ar = arl->ar; + + if (unlikely(!arl->registered)) + return ; + + if (arl->last_state != !!brightness) { + arl->toggled++; + arl->last_state = !!brightness; + } + + if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled)) + queue_delayed_work(ar->hw->workqueue, &ar->led_work, HZ/10); +} + +static int ar9170_register_led(struct ar9170 *ar, int i, char *name, + char *trigger) +{ + int err; + + snprintf(ar->leds[i].name, sizeof(ar->leds[i].name), + "ar9170-%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 = ar9170_led_brightness_set; + 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) + printk(KERN_ERR "%s: failed to register %s LED (%d).\n", + wiphy_name(ar->hw->wiphy), ar->leds[i].name, err); + else + ar->leds[i].registered = true; + + return err; +} + +void ar9170_unregister_leds(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 ar9170_register_leds(struct ar9170 *ar) +{ + int err; + + INIT_DELAYED_WORK(&ar->led_work, ar9170_update_leds); + + err = ar9170_register_led(ar, 0, "tx", + ieee80211_get_tx_led_name(ar->hw)); + if (err) + goto fail; + + err = ar9170_register_led(ar, 1, "assoc", + ieee80211_get_assoc_led_name(ar->hw)); + if (err) + goto fail; + + return 0; + +fail: + ar9170_unregister_leds(ar); + return err; +} + +#endif /* CONFIG_AR9170_LEDS */ |