1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/led.c b/drivers/net/wireless/intel/iwlwifi/mvm/led.c
new file mode 100644
index 000000000..1ea7c4425
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/led.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2012-2014, 2018-2019 Intel Corporation
+ * Copyright (C) 2017 Intel Deutschland GmbH
+ */
+#include <linux/leds.h>
+#include "iwl-io.h"
+#include "iwl-csr.h"
+#include "mvm.h"
+
+static void iwl_mvm_send_led_fw_cmd(struct iwl_mvm *mvm, bool on)
+{
+	struct iwl_led_cmd led_cmd = {
+		.status = cpu_to_le32(on),
+	};
+	struct iwl_host_cmd cmd = {
+		.id = WIDE_ID(LONG_GROUP, LEDS_CMD),
+		.len = { sizeof(led_cmd), },
+		.data = { &led_cmd, },
+		.flags = CMD_ASYNC,
+	};
+	int err;
+
+	if (!iwl_mvm_firmware_running(mvm))
+		return;
+
+	err = iwl_mvm_send_cmd(mvm, &cmd);
+
+	if (err)
+		IWL_WARN(mvm, "LED command failed: %d\n", err);
+}
+
+static void iwl_mvm_led_set(struct iwl_mvm *mvm, bool on)
+{
+	if (fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_LED_CMD_SUPPORT)) {
+		iwl_mvm_send_led_fw_cmd(mvm, on);
+		return;
+	}
+
+	iwl_write32(mvm->trans, CSR_LED_REG,
+		    on ? CSR_LED_REG_TURN_ON : CSR_LED_REG_TURN_OFF);
+}
+
+static void iwl_led_brightness_set(struct led_classdev *led_cdev,
+				   enum led_brightness brightness)
+{
+	struct iwl_mvm *mvm = container_of(led_cdev, struct iwl_mvm, led);
+
+	iwl_mvm_led_set(mvm, brightness > 0);
+}
+
+int iwl_mvm_leds_init(struct iwl_mvm *mvm)
+{
+	int mode = iwlwifi_mod_params.led_mode;
+	int ret;
+
+	switch (mode) {
+	case IWL_LED_BLINK:
+		IWL_ERR(mvm, "Blink led mode not supported, used default\n");
+		fallthrough;
+	case IWL_LED_DEFAULT:
+	case IWL_LED_RF_STATE:
+		mode = IWL_LED_RF_STATE;
+		break;
+	case IWL_LED_DISABLE:
+		IWL_INFO(mvm, "Led disabled\n");
+		return 0;
+	default:
+		return -EINVAL;
+	}
+
+	mvm->led.name = kasprintf(GFP_KERNEL, "%s-led",
+				   wiphy_name(mvm->hw->wiphy));
+	if (!mvm->led.name)
+		return -ENOMEM;
+
+	mvm->led.brightness_set = iwl_led_brightness_set;
+	mvm->led.max_brightness = 1;
+
+	if (mode == IWL_LED_RF_STATE)
+		mvm->led.default_trigger =
+			ieee80211_get_radio_led_name(mvm->hw);
+
+	ret = led_classdev_register(mvm->trans->dev, &mvm->led);
+	if (ret) {
+		kfree(mvm->led.name);
+		IWL_INFO(mvm, "Failed to enable led\n");
+		return ret;
+	}
+
+	mvm->init_status |= IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE;
+	return 0;
+}
+
+void iwl_mvm_leds_sync(struct iwl_mvm *mvm)
+{
+	if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE))
+		return;
+
+	/*
+	 * if we control through the register, we're doing it
+	 * even when the firmware isn't up, so no need to sync
+	 */
+	if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_8000)
+		return;
+
+	iwl_mvm_led_set(mvm, mvm->led.brightness > 0);
+}
+
+void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
+{
+	if (!(mvm->init_status & IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE))
+		return;
+
+	led_classdev_unregister(&mvm->led);
+	kfree(mvm->led.name);
+	mvm->init_status &= ~IWL_MVM_INIT_STATUS_LEDS_INIT_COMPLETE;
+}