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 
rtl8187_is_radio_enabled(struct rtl8187_priv * priv)23 static 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 
rtl8187_rfkill_init(struct ieee80211_hw * hw)34 void 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 
rtl8187_rfkill_poll(struct ieee80211_hw * hw)45 void 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 
rtl8187_rfkill_exit(struct ieee80211_hw * hw)61 void rtl8187_rfkill_exit(struct ieee80211_hw *hw)
62 {
63 	wiphy_rfkill_stop_polling(hw->wiphy);
64 }
65