rfkill.c

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/*
 * Linux RFKILL support for RTL8187
 *
 * Copyright (c) 2009 Herton Ronaldo Krzesinski <[email protected]>
 *
 * Based on the RFKILL handling in the r8187 driver, which is:
 * Copyright (c) Realtek Semiconductor Corp. All rights reserved.
 *
 * Thanks to Realtek for their support!
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/usb.h>
#include <net/mac80211.h>

#include "rtl8187.h"
#include "rfkill.h"

static bool rtl8187_is_radio_enabled(struct rtl8187_priv *priv)
{
    u8 gpio;

    gpio = rtl818x_ioread8(priv, &priv->map->GPIO0);
    rtl818x_iowrite8(priv, &priv->map->GPIO0, gpio & ~priv->rfkill_mask);
    gpio = rtl818x_ioread8(priv, &priv->map->GPIO1);

    return gpio & priv->rfkill_mask;
}

void rtl8187_rfkill_init(struct ieee80211_hw *hw)
{
    struct rtl8187_priv *priv = hw->priv;

    priv->rfkill_off = rtl8187_is_radio_enabled(priv);
    printk(KERN_INFO "rtl8187: wireless switch is %s\n",
           priv->rfkill_off ? "on" : "off");
    wiphy_rfkill_set_hw_state(hw->wiphy, !priv->rfkill_off);
    wiphy_rfkill_start_polling(hw->wiphy);
}

void rtl8187_rfkill_poll(struct ieee80211_hw *hw)
{
    bool enabled;
    struct rtl8187_priv *priv = hw->priv;

    mutex_lock(&priv->conf_mutex);
    enabled = rtl8187_is_radio_enabled(priv);
    if (unlikely(enabled != priv->rfkill_off)) {
        priv->rfkill_off = enabled;
        printk(KERN_INFO "rtl8187: wireless radio switch turned %s\n",
               enabled ? "on" : "off");
        wiphy_rfkill_set_hw_state(hw->wiphy, !enabled);
    }
    mutex_unlock(&priv->conf_mutex);
}

void rtl8187_rfkill_exit(struct ieee80211_hw *hw)
{
    wiphy_rfkill_stop_polling(hw->wiphy);
}