Initial import

1 files changed, 244 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00leds.c b/drivers/net/wireless/rt2x00/rt2x00leds.c
new file mode 100644
index 000000000..c681d04b5
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/rt2x00leds.c
@@ -0,0 +1,244 @@
+/*
+	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	<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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+	Module: rt2x00lib
+	Abstract: rt2x00 led specific routines.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi)
+{
+	struct rt2x00_led *led = &rt2x00dev->led_qual;
+	unsigned int brightness;
+
+	if ((led->type != LED_TYPE_QUALITY) || !(led->flags & LED_REGISTERED))
+		return;
+
+	/*
+	 * Led handling requires a positive value for the rssi,
+	 * to do that correctly we need to add the correction.
+	 */
+	rssi += rt2x00dev->rssi_offset;
+
+	/*
+	 * Get the rssi level, this is used to convert the rssi
+	 * to a LED value inside the range LED_OFF - LED_FULL.
+	 */
+	if (rssi <= 30)
+		rssi = 0;
+	else if (rssi <= 39)
+		rssi = 1;
+	else if (rssi <= 49)
+		rssi = 2;
+	else if (rssi <= 53)
+		rssi = 3;
+	else if (rssi <= 63)
+		rssi = 4;
+	else
+		rssi = 5;
+
+	/*
+	 * Note that we must _not_ send LED_OFF since the driver
+	 * is going to calculate the value and might use it in a
+	 * division.
+	 */
+	brightness = ((LED_FULL / 6) * rssi) + 1;
+	if (brightness != led->led_dev.brightness) {
+		led->led_dev.brightness_set(&led->led_dev, brightness);
+		led->led_dev.brightness = brightness;
+	}
+}
+
+static void rt2x00led_led_simple(struct rt2x00_led *led, bool enabled)
+{
+	unsigned int brightness = enabled ? LED_FULL : LED_OFF;
+
+	if (!(led->flags & LED_REGISTERED))
+		return;
+
+	led->led_dev.brightness_set(&led->led_dev, brightness);
+	led->led_dev.brightness = brightness;
+}
+
+void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev, bool enabled)
+{
+	if (rt2x00dev->led_qual.type == LED_TYPE_ACTIVITY)
+		rt2x00led_led_simple(&rt2x00dev->led_qual, enabled);
+}
+
+void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled)
+{
+	if (rt2x00dev->led_assoc.type == LED_TYPE_ASSOC)
+		rt2x00led_led_simple(&rt2x00dev->led_assoc, enabled);
+}
+
+void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled)
+{
+	if (rt2x00dev->led_radio.type == LED_TYPE_RADIO)
+		rt2x00led_led_simple(&rt2x00dev->led_radio, enabled);
+}
+
+static int rt2x00leds_register_led(struct rt2x00_dev *rt2x00dev,
+				   struct rt2x00_led *led,
+				   const char *name)
+{
+	struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
+	int retval;
+
+	led->led_dev.name = name;
+	led->led_dev.brightness = LED_OFF;
+
+	retval = led_classdev_register(device, &led->led_dev);
+	if (retval) {
+		rt2x00_err(rt2x00dev, "Failed to register led handler\n");
+		return retval;
+	}
+
+	led->flags |= LED_REGISTERED;
+
+	return 0;
+}
+
+void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
+{
+	char name[36];
+	int retval;
+	unsigned long on_period;
+	unsigned long off_period;
+	const char *phy_name = wiphy_name(rt2x00dev->hw->wiphy);
+
+	if (rt2x00dev->led_radio.flags & LED_INITIALIZED) {
+		snprintf(name, sizeof(name), "%s-%s::radio",
+			 rt2x00dev->ops->name, phy_name);
+
+		retval = rt2x00leds_register_led(rt2x00dev,
+						 &rt2x00dev->led_radio,
+						 name);
+		if (retval)
+			goto exit_fail;
+	}
+
+	if (rt2x00dev->led_assoc.flags & LED_INITIALIZED) {
+		snprintf(name, sizeof(name), "%s-%s::assoc",
+			 rt2x00dev->ops->name, phy_name);
+
+		retval = rt2x00leds_register_led(rt2x00dev,
+						 &rt2x00dev->led_assoc,
+						 name);
+		if (retval)
+			goto exit_fail;
+	}
+
+	if (rt2x00dev->led_qual.flags & LED_INITIALIZED) {
+		snprintf(name, sizeof(name), "%s-%s::quality",
+			 rt2x00dev->ops->name, phy_name);
+
+		retval = rt2x00leds_register_led(rt2x00dev,
+						 &rt2x00dev->led_qual,
+						 name);
+		if (retval)
+			goto exit_fail;
+	}
+
+	/*
+	 * Initialize blink time to default value:
+	 * On period: 70ms
+	 * Off period: 30ms
+	 */
+	if (rt2x00dev->led_radio.led_dev.blink_set) {
+		on_period = 70;
+		off_period = 30;
+		rt2x00dev->led_radio.led_dev.blink_set(
+		    &rt2x00dev->led_radio.led_dev, &on_period, &off_period);
+	}
+
+	return;
+
+exit_fail:
+	rt2x00leds_unregister(rt2x00dev);
+}
+
+static void rt2x00leds_unregister_led(struct rt2x00_led *led)
+{
+	led_classdev_unregister(&led->led_dev);
+
+	/*
+	 * This might look weird, but when we are unregistering while
+	 * suspended the led is already off, and since we haven't
+	 * fully resumed yet, access to the device might not be
+	 * possible yet.
+	 */
+	if (!(led->led_dev.flags & LED_SUSPENDED))
+		led->led_dev.brightness_set(&led->led_dev, LED_OFF);
+
+	led->flags &= ~LED_REGISTERED;
+}
+
+void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
+{
+	if (rt2x00dev->led_qual.flags & LED_REGISTERED)
+		rt2x00leds_unregister_led(&rt2x00dev->led_qual);
+	if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
+		rt2x00leds_unregister_led(&rt2x00dev->led_assoc);
+	if (rt2x00dev->led_radio.flags & LED_REGISTERED)
+		rt2x00leds_unregister_led(&rt2x00dev->led_radio);
+}
+
+static inline void rt2x00leds_suspend_led(struct rt2x00_led *led)
+{
+	led_classdev_suspend(&led->led_dev);
+
+	/* This shouldn't be needed, but just to be safe */
+	led->led_dev.brightness_set(&led->led_dev, LED_OFF);
+	led->led_dev.brightness = LED_OFF;
+}
+
+void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
+{
+	if (rt2x00dev->led_qual.flags & LED_REGISTERED)
+		rt2x00leds_suspend_led(&rt2x00dev->led_qual);
+	if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
+		rt2x00leds_suspend_led(&rt2x00dev->led_assoc);
+	if (rt2x00dev->led_radio.flags & LED_REGISTERED)
+		rt2x00leds_suspend_led(&rt2x00dev->led_radio);
+}
+
+static inline void rt2x00leds_resume_led(struct rt2x00_led *led)
+{
+	led_classdev_resume(&led->led_dev);
+
+	/* Device might have enabled the LEDS during resume */
+	led->led_dev.brightness_set(&led->led_dev, LED_OFF);
+	led->led_dev.brightness = LED_OFF;
+}
+
+void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
+{
+	if (rt2x00dev->led_radio.flags & LED_REGISTERED)
+		rt2x00leds_resume_led(&rt2x00dev->led_radio);
+	if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
+		rt2x00leds_resume_led(&rt2x00dev->led_assoc);
+	if (rt2x00dev->led_qual.flags & LED_REGISTERED)
+		rt2x00leds_resume_led(&rt2x00dev->led_qual);
+}