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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fe8ee9ad80
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
191 lines
4.9 KiB
C
191 lines
4.9 KiB
C
/*
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* Atheros CARL9170 driver
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*
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* LED handling
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*
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2009, 2010, Christian Lamparer <chunkeey@googlemail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, see
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* http://www.gnu.org/licenses/.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* Copyright (c) 2007-2008 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "carl9170.h"
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#include "cmd.h"
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int carl9170_led_set_state(struct ar9170 *ar, const u32 led_state)
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{
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return carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_DATA, led_state);
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}
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int carl9170_led_init(struct ar9170 *ar)
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{
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int err;
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/* disable LEDs */
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/* GPIO [0/1 mode: output, 2/3: input] */
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err = carl9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
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if (err)
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goto out;
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/* GPIO 0/1 value: off */
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err = carl9170_led_set_state(ar, 0);
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out:
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return err;
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}
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#ifdef CONFIG_CARL9170_LEDS
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static void carl9170_led_update(struct work_struct *work)
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{
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struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
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int i, tmp = 300, blink_delay = 1000;
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u32 led_val = 0;
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bool rerun = false;
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if (!IS_ACCEPTING_CMD(ar))
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return;
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mutex_lock(&ar->mutex);
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for (i = 0; i < AR9170_NUM_LEDS; i++) {
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if (ar->leds[i].registered) {
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if (ar->leds[i].last_state ||
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ar->leds[i].toggled) {
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if (ar->leds[i].toggled)
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tmp = 70 + 200 / (ar->leds[i].toggled);
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if (tmp < blink_delay)
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blink_delay = tmp;
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led_val |= 1 << i;
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ar->leds[i].toggled = 0;
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rerun = true;
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}
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}
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}
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carl9170_led_set_state(ar, led_val);
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mutex_unlock(&ar->mutex);
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if (!rerun)
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return;
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ieee80211_queue_delayed_work(ar->hw,
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&ar->led_work,
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msecs_to_jiffies(blink_delay));
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}
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static void carl9170_led_set_brightness(struct led_classdev *led,
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enum led_brightness brightness)
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{
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struct carl9170_led *arl = container_of(led, struct carl9170_led, l);
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struct ar9170 *ar = arl->ar;
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if (!arl->registered)
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return;
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if (arl->last_state != !!brightness) {
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arl->toggled++;
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arl->last_state = !!brightness;
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}
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if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
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ieee80211_queue_delayed_work(ar->hw, &ar->led_work, HZ/10);
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}
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static int carl9170_led_register_led(struct ar9170 *ar, int i, char *name,
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char *trigger)
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{
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int err;
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snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
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"carl9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
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ar->leds[i].ar = ar;
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ar->leds[i].l.name = ar->leds[i].name;
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ar->leds[i].l.brightness_set = carl9170_led_set_brightness;
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ar->leds[i].l.brightness = 0;
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ar->leds[i].l.default_trigger = trigger;
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err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
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&ar->leds[i].l);
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if (err) {
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wiphy_err(ar->hw->wiphy, "failed to register %s LED (%d).\n",
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ar->leds[i].name, err);
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} else {
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ar->leds[i].registered = true;
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}
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return err;
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}
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void carl9170_led_unregister(struct ar9170 *ar)
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{
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int i;
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for (i = 0; i < AR9170_NUM_LEDS; i++)
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if (ar->leds[i].registered) {
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led_classdev_unregister(&ar->leds[i].l);
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ar->leds[i].registered = false;
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ar->leds[i].toggled = 0;
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}
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cancel_delayed_work_sync(&ar->led_work);
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}
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int carl9170_led_register(struct ar9170 *ar)
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{
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int err;
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INIT_DELAYED_WORK(&ar->led_work, carl9170_led_update);
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err = carl9170_led_register_led(ar, 0, "tx",
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ieee80211_get_tx_led_name(ar->hw));
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if (err)
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goto fail;
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if (ar->features & CARL9170_ONE_LED)
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return 0;
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err = carl9170_led_register_led(ar, 1, "assoc",
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ieee80211_get_assoc_led_name(ar->hw));
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if (err)
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goto fail;
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return 0;
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fail:
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carl9170_led_unregister(ar);
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return err;
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}
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#endif /* CONFIG_CARL9170_LEDS */
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