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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Linux RFKILL support for RTL81874 *5 * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>6 *7 * Based on the RFKILL handling in the r8187 driver, which is:8 * Copyright (c) Realtek Semiconductor Corp. All rights reserved.9 *10 * Thanks to Realtek for their support!11 */12 13#include <linux/types.h>14#include <linux/usb.h>15#include <net/mac80211.h>16 17#include "rtl8187.h"18#include "rfkill.h"19 20static bool rtl8187_is_radio_enabled(struct rtl8187_priv *priv)21{22 u8 gpio;23 24 gpio = rtl818x_ioread8(priv, &priv->map->GPIO0);25 rtl818x_iowrite8(priv, &priv->map->GPIO0, gpio & ~priv->rfkill_mask);26 gpio = rtl818x_ioread8(priv, &priv->map->GPIO1);27 28 return gpio & priv->rfkill_mask;29}30 31void rtl8187_rfkill_init(struct ieee80211_hw *hw)32{33 struct rtl8187_priv *priv = hw->priv;34 35 priv->rfkill_off = rtl8187_is_radio_enabled(priv);36 printk(KERN_INFO "rtl8187: wireless switch is %s\n",37 priv->rfkill_off ? "on" : "off");38 wiphy_rfkill_set_hw_state(hw->wiphy, !priv->rfkill_off);39 wiphy_rfkill_start_polling(hw->wiphy);40}41 42void rtl8187_rfkill_poll(struct ieee80211_hw *hw)43{44 bool enabled;45 struct rtl8187_priv *priv = hw->priv;46 47 mutex_lock(&priv->conf_mutex);48 enabled = rtl8187_is_radio_enabled(priv);49 if (unlikely(enabled != priv->rfkill_off)) {50 priv->rfkill_off = enabled;51 printk(KERN_INFO "rtl8187: wireless radio switch turned %s\n",52 enabled ? "on" : "off");53 wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);54 }55 mutex_unlock(&priv->conf_mutex);56}57 58void rtl8187_rfkill_exit(struct ieee80211_hw *hw)59{60 wiphy_rfkill_stop_polling(hw->wiphy);61}62