--- /dev/null
+/*
+ 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);
+}
Code Review / kvmfornfv.git / blobdiff