LXR linux/drivers/net/wireless/rtl818x/rtl8187/rfkill.c

   1/*
   2 * Linux RFKILL support for RTL8187
   3 *
   4 * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
   5 *
   6 * Based on the RFKILL handling in the r8187 driver, which is:
   7 * Copyright (c) Realtek Semiconductor Corp. All rights reserved.
   8 *
   9 * Thanks to Realtek for their support!
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License version 2 as
  13 * published by the Free Software Foundation.
  14 */
  15
  16#include <linux/types.h>
  17#include <linux/usb.h>
  18#include <net/mac80211.h>
  19
  20#include "rtl8187.h"
  21#include "rfkill.h"
  22
  23static bool rtl8187_is_radio_enabled(struct rtl8187_priv *priv)
  24{
  25        u8 gpio;
  26
  27        gpio = rtl818x_ioread8(priv, &priv->map->GPIO0);
  28        rtl818x_iowrite8(priv, &priv->map->GPIO0, gpio & ~priv->rfkill_mask);
  29        gpio = rtl818x_ioread8(priv, &priv->map->GPIO1);
  30
  31        return gpio & priv->rfkill_mask;
  32}
  33
  34void rtl8187_rfkill_init(struct ieee80211_hw *hw)
  35{
  36        struct rtl8187_priv *priv = hw->priv;
  37
  38        priv->rfkill_off = rtl8187_is_radio_enabled(priv);
  39        printk(KERN_INFO "rtl8187: wireless switch is %s\n",
  40               priv->rfkill_off ? "on" : "off");
  41        wiphy_rfkill_set_hw_state(hw->wiphy, !priv->rfkill_off);
  42        wiphy_rfkill_start_polling(hw->wiphy);
  43}
  44
  45void rtl8187_rfkill_poll(struct ieee80211_hw *hw)
  46{
  47        bool enabled;
  48        struct rtl8187_priv *priv = hw->priv;
  49
  50        mutex_lock(&priv->conf_mutex);
  51        enabled = rtl8187_is_radio_enabled(priv);
  52        if (unlikely(enabled != priv->rfkill_off)) {
  53                priv->rfkill_off = enabled;
  54                printk(KERN_INFO "rtl8187: wireless radio switch turned %s\n",
  55                       enabled ? "on" : "off");
  56                wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
  57        }
  58        mutex_unlock(&priv->conf_mutex);
  59}
  60
  61void rtl8187_rfkill_exit(struct ieee80211_hw *hw)
  62{
  63        wiphy_rfkill_stop_polling(hw->wiphy);
  64}
  65