rtl8187: Implement rfkill support

This change implements rfkill support for RTL8187B and RTL8187L devices,
using new cfg80211 rfkill API.

Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 63 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtl818x/rtl8187_rfkill.c b/drivers/net/wireless/rtl818x/rtl8187_rfkill.c
new file mode 100644
index 00000000000..9fab13e4004
--- /dev/null
+++ b/drivers/net/wireless/rtl818x/rtl8187_rfkill.c
@@ -0,0 +1,63 @@
+/*
+ * Linux RFKILL support for RTL8187
+ *
+ * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
+ *
+ * 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"
+
+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 & ~0x02);
+	gpio = rtl818x_ioread8(priv, &priv->map->GPIO1);
+
+	return gpio & 0x02;
+}
+
+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);
+}