led.c

  1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
  2/*
  3 * Copyright (C) 2024 Intel Corporation
  4 */
  5#include <linux/leds.h>
  6#include <net/mac80211.h>
  7
  8#include "fw/api/led.h"
  9#include "mld.h"
 10#include "led.h"
 11#include "hcmd.h"
 12
 13static void iwl_mld_send_led_fw_cmd(struct iwl_mld *mld, bool on)
 14{
 15	struct iwl_led_cmd led_cmd = {
 16		.status = cpu_to_le32(on),
 17	};
 18	int err;
 19
 20	if (WARN_ON(!mld->fw_status.running))
 21		return;
 22
 23	err = iwl_mld_send_cmd_with_flags_pdu(mld, WIDE_ID(LONG_GROUP,
 24							   LEDS_CMD),
 25					      CMD_ASYNC, &led_cmd);
 26
 27	if (err)
 28		IWL_WARN(mld, "LED command failed: %d\n", err);
 29}
 30
 31static void iwl_led_brightness_set(struct led_classdev *led_cdev,
 32				   enum led_brightness brightness)
 33{
 34	struct iwl_mld *mld = container_of(led_cdev, struct iwl_mld, led);
 35
 36	if (!mld->fw_status.running)
 37		return;
 38
 39	iwl_mld_send_led_fw_cmd(mld, brightness > 0);
 40}
 41
 42int iwl_mld_leds_init(struct iwl_mld *mld)
 43{
 44	int mode = iwlwifi_mod_params.led_mode;
 45	int ret;
 46
 47	switch (mode) {
 48	case IWL_LED_BLINK:
 49		IWL_ERR(mld, "Blink led mode not supported, used default\n");
 50		fallthrough;
 51	case IWL_LED_DEFAULT:
 52	case IWL_LED_RF_STATE:
 53		mode = IWL_LED_RF_STATE;
 54		break;
 55	case IWL_LED_DISABLE:
 56		IWL_INFO(mld, "Led disabled\n");
 57		return 0;
 58	default:
 59		return -EINVAL;
 60	}
 61
 62	mld->led.name = kasprintf(GFP_KERNEL, "%s-led",
 63				  wiphy_name(mld->hw->wiphy));
 64	if (!mld->led.name)
 65		return -ENOMEM;
 66
 67	mld->led.brightness_set = iwl_led_brightness_set;
 68	mld->led.max_brightness = 1;
 69
 70	if (mode == IWL_LED_RF_STATE)
 71		mld->led.default_trigger =
 72			ieee80211_get_radio_led_name(mld->hw);
 73
 74	ret = led_classdev_register(mld->trans->dev, &mld->led);
 75	if (ret) {
 76		kfree(mld->led.name);
 77		mld->led.name = NULL;
 78		IWL_INFO(mld, "Failed to enable led\n");
 79	}
 80
 81	return ret;
 82}
 83
 84void iwl_mld_led_config_fw(struct iwl_mld *mld)
 85{
 86	if (!mld->led.name)
 87		return;
 88
 89	iwl_mld_send_led_fw_cmd(mld, mld->led.brightness > 0);
 90}
 91
 92void iwl_mld_leds_exit(struct iwl_mld *mld)
 93{
 94	if (!mld->led.name)
 95		return;
 96
 97	led_classdev_unregister(&mld->led);
 98	kfree(mld->led.name);
 99	mld->led.name = NULL;
100}