// SPDX-License-Identifier: GPL-2.0
#include <net/mac80211.h>
#include <linux/bcma/bcma_driver_chipcommon.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>

#include "mac80211_if.h"
#include "pub.h"
#include "main.h"
#include "led.h"

        /* number of leds */
#define  BRCMS_LED_NO           4
        /* behavior mask */
#define  BRCMS_LED_BEH_MASK     0x7f
        /* activelow (polarity) bit */
#define  BRCMS_LED_AL_MASK      0x80
        /* radio enabled */
#define  BRCMS_LED_RADIO        3

static void brcms_radio_led_ctrl(struct brcms_info *wl, bool state)
{
        if (!wl->radio_led.gpiod)
                return;

        if (state)
                gpiod_set_value(wl->radio_led.gpiod, 1);
        else
                gpiod_set_value(wl->radio_led.gpiod, 0);
}


/* Callback from the LED subsystem. */
static void brcms_led_brightness_set(struct led_classdev *led_dev,
                                   enum led_brightness brightness)
{
        struct brcms_info *wl = container_of(led_dev,
                struct brcms_info, led_dev);
        brcms_radio_led_ctrl(wl, brightness);
}

void brcms_led_unregister(struct brcms_info *wl)
{
        if (wl->led_dev.dev)
                led_classdev_unregister(&wl->led_dev);
        if (wl->radio_led.gpiod)
                gpiochip_free_own_desc(wl->radio_led.gpiod);
}

int brcms_led_register(struct brcms_info *wl)
{
        int i, err;
        struct brcms_led *radio_led = &wl->radio_led;
        /* get CC core */
        struct bcma_drv_cc *cc_drv  = &wl->wlc->hw->d11core->bus->drv_cc;
        struct gpio_chip *bcma_gpio = &cc_drv->gpio;
        struct ssb_sprom *sprom = &wl->wlc->hw->d11core->bus->sprom;
        u8 *leds[] = { &sprom->gpio0,
                &sprom->gpio1,
                &sprom->gpio2,
                &sprom->gpio3 };
        int hwnum = -1;
        enum gpio_lookup_flags lflags = GPIO_ACTIVE_HIGH;

        /* find radio enabled LED */
        for (i = 0; i < BRCMS_LED_NO; i++) {
                u8 led = *leds[i];
                if ((led & BRCMS_LED_BEH_MASK) == BRCMS_LED_RADIO) {
                        hwnum = i;
                        if (led & BRCMS_LED_AL_MASK)
                                lflags = GPIO_ACTIVE_LOW;
                        break;
                }
        }

        /* No LED, bail out */
        if (hwnum == -1)
                return -ENODEV;

        /* Try to obtain this LED GPIO line */
        radio_led->gpiod = gpiochip_request_own_desc(bcma_gpio, hwnum,
                                                     "radio on", lflags,
                                                     GPIOD_OUT_LOW);

        if (IS_ERR(radio_led->gpiod)) {
                err = PTR_ERR(radio_led->gpiod);
                wiphy_err(wl->wiphy, "requesting led GPIO failed (err: %d)\n",
                          err);
                return err;
        }

        snprintf(wl->radio_led.name, sizeof(wl->radio_led.name),
                 "brcmsmac-%s:radio", wiphy_name(wl->wiphy));

        wl->led_dev.name = wl->radio_led.name;
        wl->led_dev.default_trigger =
                ieee80211_get_radio_led_name(wl->pub->ieee_hw);
        wl->led_dev.brightness_set = brcms_led_brightness_set;
        err = led_classdev_register(wiphy_dev(wl->wiphy), &wl->led_dev);

        if (err) {
                wiphy_err(wl->wiphy, "cannot register led device: %s (err: %d)\n",
                          wl->radio_led.name, err);
                return err;
        }

        wiphy_info(wl->wiphy, "registered radio enabled led device: %s\n",
                   wl->radio_led.name);

        return 0;
}