// SPDX-License-Identifier: GPL-2.0-only
/*
 * Common code for mac80211 Prism54 drivers
 *
 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 *
 * Based on:
 * - the islsm (softmac prism54) driver, which is:
 *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
 * - stlc45xx driver
 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 */

#include <linux/firmware.h>
#include <linux/etherdevice.h>

#include <net/mac80211.h>
#ifdef CONFIG_P54_LEDS
#include <linux/leds.h>
#endif /* CONFIG_P54_LEDS */

#include "p54.h"
#include "lmac.h"

static void p54_update_leds(struct work_struct *work)
{
        struct p54_common *priv = container_of(work, struct p54_common,
                                               led_work.work);
        int err, i, tmp, blink_delay = 400;
        bool rerun = false;

        /* Don't toggle the LED, when the device is down. */
        if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
                return ;

        for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
                if (priv->leds[i].toggled) {
                        priv->softled_state |= BIT(i);

                        tmp = 70 + 200 / (priv->leds[i].toggled);
                        if (tmp < blink_delay)
                                blink_delay = tmp;

                        if (priv->leds[i].led_dev.brightness == LED_OFF)
                                rerun = true;

                        priv->leds[i].toggled =
                                !!priv->leds[i].led_dev.brightness;
                } else
                        priv->softled_state &= ~BIT(i);

        err = p54_set_leds(priv);
        if (err && net_ratelimit())
                wiphy_err(priv->hw->wiphy,
                          "failed to update LEDs (%d).\n", err);

        if (rerun)
                ieee80211_queue_delayed_work(priv->hw, &priv->led_work,
                        msecs_to_jiffies(blink_delay));
}

static void p54_led_brightness_set(struct led_classdev *led_dev,
                                   enum led_brightness brightness)
{
        struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev,
                                               led_dev);
        struct ieee80211_hw *dev = led->hw_dev;
        struct p54_common *priv = dev->priv;

        if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
                return ;

        if ((brightness) && (led->registered)) {
                led->toggled++;
                ieee80211_queue_delayed_work(priv->hw, &priv->led_work, HZ/10);
        }
}

static int p54_register_led(struct p54_common *priv,
                            unsigned int led_index,
                            char *name, const char *trigger)
{
        struct p54_led_dev *led = &priv->leds[led_index];
        int err;

        if (led->registered)
                return -EEXIST;

        snprintf(led->name, sizeof(led->name), "p54-%s::%s",
                 wiphy_name(priv->hw->wiphy), name);
        led->hw_dev = priv->hw;
        led->index = led_index;
        led->led_dev.name = led->name;
        led->led_dev.default_trigger = trigger;
        led->led_dev.brightness_set = p54_led_brightness_set;

        err = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_dev);
        if (err)
                wiphy_err(priv->hw->wiphy,
                          "Failed to register %s LED.\n", name);
        else
                led->registered = 1;

        return err;
}

int p54_init_leds(struct p54_common *priv)
{
        int err;

        /*
         * TODO:
         * Figure out if the EEPROM contains some hints about the number
         * of available/programmable LEDs of the device.
         */

        INIT_DELAYED_WORK(&priv->led_work, p54_update_leds);

        err = p54_register_led(priv, 0, "assoc",
                               ieee80211_get_assoc_led_name(priv->hw));
        if (err)
                return err;

        err = p54_register_led(priv, 1, "tx",
                               ieee80211_get_tx_led_name(priv->hw));
        if (err)
                return err;

        err = p54_register_led(priv, 2, "rx",
                               ieee80211_get_rx_led_name(priv->hw));
        if (err)
                return err;

        err = p54_register_led(priv, 3, "radio",
                               ieee80211_get_radio_led_name(priv->hw));
        if (err)
                return err;

        err = p54_set_leds(priv);
        return err;
}

void p54_unregister_leds(struct p54_common *priv)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(priv->leds); i++) {
                if (priv->leds[i].registered) {
                        priv->leds[i].registered = false;
                        priv->leds[i].toggled = 0;
                        led_classdev_unregister(&priv->leds[i].led_dev);
                }
        }

        cancel_delayed_work_sync(&priv->led_work);
}