[RT2x00]: add driver for Ralink wireless hardware

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/rt2x00/rt2x00rfkill.c

@@ -0,0 +1,148 @@
+/*
+	Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+	<http://rt2x00.serialmonkey.com>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the
+	Free Software Foundation, Inc.,
+	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+	Module: rt2x00rfkill
+	Abstract: rt2x00 rfkill routines.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt2x00lib"
+
+#include <linux/input-polldev.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/rfkill.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+static int rt2x00rfkill_toggle_radio(void *data, enum rfkill_state state)
+{
+	struct rt2x00_dev *rt2x00dev = data;
+	int retval = 0;
+
+	if (unlikely(!rt2x00dev))
+		return 0;
+
+	/*
+	 * Only continue if we have an active interface,
+	 * either monitor or non-monitor should be present.
+	 */
+	if (!is_interface_present(&rt2x00dev->interface) &&
+	    !is_monitor_present(&rt2x00dev->interface))
+		return 0;
+
+	if (state == RFKILL_STATE_ON) {
+		INFO(rt2x00dev, "Hardware button pressed, enabling radio.\n");
+		__set_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags);
+		retval = rt2x00lib_enable_radio(rt2x00dev);
+	} else if (state == RFKILL_STATE_OFF) {
+		INFO(rt2x00dev, "Hardware button pressed, disabling radio.\n");
+		__clear_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags);
+		rt2x00lib_disable_radio(rt2x00dev);
+	}
+
+	return retval;
+}
+
+static void rt2x00rfkill_poll(struct input_polled_dev *poll_dev)
+{
+	struct rt2x00_dev *rt2x00dev = poll_dev->private;
+	int state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
+
+	if (rt2x00dev->rfkill->state != state)
+		input_report_key(poll_dev->input, KEY_WLAN, 1);
+}
+
+int rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
+{
+	int retval;
+
+	if (!test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
+		return 0;
+
+	retval = rfkill_register(rt2x00dev->rfkill);
+	if (retval) {
+		ERROR(rt2x00dev, "Failed to register rfkill handler.\n");
+		return retval;
+	}
+
+	retval = input_register_polled_device(rt2x00dev->poll_dev);
+	if (retval) {
+		ERROR(rt2x00dev, "Failed to register polled device.\n");
+		rfkill_unregister(rt2x00dev->rfkill);
+		return retval;
+	}
+
+	return 0;
+}
+
+void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
+{
+	if (!test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
+		return;
+
+	input_unregister_polled_device(rt2x00dev->poll_dev);
+	rfkill_unregister(rt2x00dev->rfkill);
+}
+
+int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
+{
+	struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
+
+	if (!test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
+		return 0;
+
+	rt2x00dev->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
+	if (!rt2x00dev->rfkill) {
+		ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");
+		return -ENOMEM;
+	}
+
+	rt2x00dev->rfkill->name = rt2x00dev->ops->name;
+	rt2x00dev->rfkill->data = rt2x00dev;
+	rt2x00dev->rfkill->state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
+	rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;
+
+	rt2x00dev->poll_dev = input_allocate_polled_device();
+	if (!rt2x00dev->poll_dev) {
+		ERROR(rt2x00dev, "Failed to allocate polled device.\n");
+		rfkill_free(rt2x00dev->rfkill);
+		return -ENOMEM;
+	}
+
+	rt2x00dev->poll_dev->private = rt2x00dev;
+	rt2x00dev->poll_dev->poll = rt2x00rfkill_poll;
+	rt2x00dev->poll_dev->poll_interval = RFKILL_POLL_INTERVAL;
+
+	return 0;
+}
+
+void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
+{
+	if (!test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
+		return;
+
+	input_free_polled_device(rt2x00dev->poll_dev);
+	rfkill_free(rt2x00dev->rfkill);
+}