LXR linux/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
  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