// SPDX-License-Identifier: ISC
/*
 * Copyright (c) 2005-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
 * Copyright (c) 2018 Sebastian Gottschall <s.gottschall@dd-wrt.com>
 * Copyright (c) 2018 The Linux Foundation. All rights reserved.
 */

#include <linux/leds.h>

#include "core.h"
#include "wmi.h"
#include "wmi-ops.h"

#include "leds.h"

static int ath10k_leds_set_brightness_blocking(struct led_classdev *led_cdev,
                                               enum led_brightness brightness)
{
        struct ath10k *ar = container_of(led_cdev, struct ath10k,
                                         leds.cdev);
        struct gpio_led *led = &ar->leds.wifi_led;

        mutex_lock(&ar->conf_mutex);

        if (ar->state != ATH10K_STATE_ON)
                goto out;

        ar->leds.gpio_state_pin = (brightness != LED_OFF) ^ led->active_low;
        ath10k_wmi_gpio_output(ar, ar->hw_params.led_pin, ar->leds.gpio_state_pin);

out:
        mutex_unlock(&ar->conf_mutex);

        return 0;
}

int ath10k_leds_start(struct ath10k *ar)
{
        if (ar->hw_params.led_pin == 0)
                /* leds not supported */
                return 0;

        /* under some circumstances, the gpio pin gets reconfigured
         * to default state by the firmware, so we need to
         * reconfigure it this behaviour has only ben seen on
         * QCA9984 and QCA99XX devices so far
         */
        ath10k_wmi_gpio_config(ar, ar->hw_params.led_pin, 0,
                               WMI_GPIO_PULL_NONE, WMI_GPIO_INTTYPE_DISABLE);
        ath10k_wmi_gpio_output(ar, ar->hw_params.led_pin, 1);

        return 0;
}

int ath10k_leds_register(struct ath10k *ar)
{
        int ret;

        if (ar->hw_params.led_pin == 0)
                /* leds not supported */
                return 0;

        snprintf(ar->leds.label, sizeof(ar->leds.label), "ath10k-%s",
                 wiphy_name(ar->hw->wiphy));
        ar->leds.wifi_led.active_low = 1;
        ar->leds.wifi_led.name = ar->leds.label;
        ar->leds.wifi_led.default_state = LEDS_GPIO_DEFSTATE_KEEP;

        ar->leds.cdev.name = ar->leds.label;
        ar->leds.cdev.brightness_set_blocking = ath10k_leds_set_brightness_blocking;
        ar->leds.cdev.default_trigger = ar->leds.wifi_led.default_trigger;

        ret = led_classdev_register(wiphy_dev(ar->hw->wiphy), &ar->leds.cdev);
        if (ret)
                return ret;

        return 0;
}

void ath10k_leds_unregister(struct ath10k *ar)
{
        if (ar->hw_params.led_pin == 0)
                /* leds not supported */
                return;

        led_classdev_unregister(&ar->leds.cdev);
}