1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c
new file mode 100644
index 000000000..c1b9ac692
--- /dev/null
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/led.c
@@ -0,0 +1,115 @@
+// 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;
+
+	if (!bcma_gpio || !gpio_is_valid(bcma_gpio->base))
+		return -ENODEV;
+
+	/* 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;
+}