// SPDX-License-Identifier: GPL-2.0
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#include <net/mac80211.h>
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#include <linux/bcma/bcma_driver_chipcommon.h>
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#include <linux/gpio/driver.h>
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#include <linux/gpio/machine.h>
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#include <linux/gpio/consumer.h>
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#include "mac80211_if.h"
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#include "pub.h"
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#include "main.h"
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#include "led.h"
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/* number of leds */
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#define BRCMS_LED_NO 4
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/* behavior mask */
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#define BRCMS_LED_BEH_MASK 0x7f
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/* activelow (polarity) bit */
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#define BRCMS_LED_AL_MASK 0x80
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/* radio enabled */
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#define BRCMS_LED_RADIO 3
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static void brcms_radio_led_ctrl(struct brcms_info *wl, bool state)
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{
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if (!wl->radio_led.gpiod)
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return;
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if (state)
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gpiod_set_value(wl->radio_led.gpiod, 1);
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else
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gpiod_set_value(wl->radio_led.gpiod, 0);
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}
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/* Callback from the LED subsystem. */
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static void brcms_led_brightness_set(struct led_classdev *led_dev,
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enum led_brightness brightness)
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{
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struct brcms_info *wl = container_of(led_dev,
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struct brcms_info, led_dev);
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brcms_radio_led_ctrl(wl, brightness);
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}
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void brcms_led_unregister(struct brcms_info *wl)
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{
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if (wl->led_dev.dev)
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led_classdev_unregister(&wl->led_dev);
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if (wl->radio_led.gpiod)
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gpiochip_free_own_desc(wl->radio_led.gpiod);
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}
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int brcms_led_register(struct brcms_info *wl)
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{
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int i, err;
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struct brcms_led *radio_led = &wl->radio_led;
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/* get CC core */
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struct bcma_drv_cc *cc_drv = &wl->wlc->hw->d11core->bus->drv_cc;
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struct gpio_chip *bcma_gpio = &cc_drv->gpio;
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struct ssb_sprom *sprom = &wl->wlc->hw->d11core->bus->sprom;
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u8 *leds[] = { &sprom->gpio0,
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&sprom->gpio1,
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&sprom->gpio2,
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&sprom->gpio3 };
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int hwnum = -1;
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enum gpio_lookup_flags lflags = GPIO_ACTIVE_HIGH;
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if (!bcma_gpio || !gpio_is_valid(bcma_gpio->base))
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return -ENODEV;
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/* find radio enabled LED */
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for (i = 0; i < BRCMS_LED_NO; i++) {
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u8 led = *leds[i];
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if ((led & BRCMS_LED_BEH_MASK) == BRCMS_LED_RADIO) {
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hwnum = i;
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if (led & BRCMS_LED_AL_MASK)
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lflags = GPIO_ACTIVE_LOW;
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break;
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}
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}
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/* No LED, bail out */
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if (hwnum == -1)
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return -ENODEV;
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/* Try to obtain this LED GPIO line */
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radio_led->gpiod = gpiochip_request_own_desc(bcma_gpio, hwnum,
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"radio on", lflags,
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GPIOD_OUT_LOW);
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if (IS_ERR(radio_led->gpiod)) {
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err = PTR_ERR(radio_led->gpiod);
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wiphy_err(wl->wiphy, "requesting led GPIO failed (err: %d)\n",
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err);
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return err;
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}
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snprintf(wl->radio_led.name, sizeof(wl->radio_led.name),
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"brcmsmac-%s:radio", wiphy_name(wl->wiphy));
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wl->led_dev.name = wl->radio_led.name;
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wl->led_dev.default_trigger =
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ieee80211_get_radio_led_name(wl->pub->ieee_hw);
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wl->led_dev.brightness_set = brcms_led_brightness_set;
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err = led_classdev_register(wiphy_dev(wl->wiphy), &wl->led_dev);
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if (err) {
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wiphy_err(wl->wiphy, "cannot register led device: %s (err: %d)\n",
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wl->radio_led.name, err);
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return err;
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}
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wiphy_info(wl->wiphy, "registered radio enabled led device: %s\n",
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wl->radio_led.name);
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return 0;
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}
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