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 
rtl8187_is_radio_enabled(struct rtl8187_priv * priv)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 
rtl8187_rfkill_init(struct ieee80211_hw * hw)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 
rtl8187_rfkill_poll(struct ieee80211_hw * hw)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 
rtl8187_rfkill_exit(struct ieee80211_hw * hw)58 void rtl8187_rfkill_exit(struct ieee80211_hw *hw)
59 {
60 	wiphy_rfkill_stop_polling(hw->wiphy);
61 }
62