drivers/net/wireless/realtek/rtl818x/rtl8187/rfkill.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Linux RFKILL support for RTL8187
   4  *
   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
  20 static 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
  31 void 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
  42 void 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
  58 void rtl8187_rfkill_exit(struct ieee80211_hw *hw)
  59 {
  60         wiphy_rfkill_stop_polling(hw->wiphy);
  61 }