Quelle  led.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
 * Copyright (C) 2012-2014, 2018-2019, 2025 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->mac_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;
}