p54: Move LED code

Copy the LED code from p54common.c into a new file led.c
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/p54/led.c

+/*
+ * Common code for mac80211 Prism54 drivers
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * Based on:
+ * - the islsm (softmac prism54) driver, which is:
+ *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ * - stlc45xx driver
+ *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * 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/init.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+
+#include <net/mac80211.h>
+#ifdef CONFIG_P54_LEDS
+#include <linux/leds.h>
+#endif /* CONFIG_P54_LEDS */
+
+#include "p54.h"
+#include "lmac.h"
+
+static void p54_update_leds(struct work_struct *work)
+{
+	struct p54_common *priv = container_of(work, struct p54_common,
+					       led_work.work);
+	int err, i, tmp, blink_delay = 400;
+	bool rerun = false;
+
+	/* Don't toggle the LED, when the device is down. */
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
+		return ;
+
+	for (i = 0; i < ARRAY_SIZE(priv->leds); i++)
+		if (priv->leds[i].toggled) {
+			priv->softled_state |= BIT(i);
+
+			tmp = 70 + 200 / (priv->leds[i].toggled);
+			if (tmp < blink_delay)
+				blink_delay = tmp;
+
+			if (priv->leds[i].led_dev.brightness == LED_OFF)
+				rerun = true;
+
+			priv->leds[i].toggled =
+				!!priv->leds[i].led_dev.brightness;
+		} else
+			priv->softled_state &= ~BIT(i);
+
+	err = p54_set_leds(priv);
+	if (err && net_ratelimit())
+		printk(KERN_ERR "%s: failed to update LEDs (%d).\n",
+			wiphy_name(priv->hw->wiphy), err);
+
+	if (rerun)
+		queue_delayed_work(priv->hw->workqueue, &priv->led_work,
+			msecs_to_jiffies(blink_delay));
+}
+
+static void p54_led_brightness_set(struct led_classdev *led_dev,
+				   enum led_brightness brightness)
+{
+	struct p54_led_dev *led = container_of(led_dev, struct p54_led_dev,
+					       led_dev);
+	struct ieee80211_hw *dev = led->hw_dev;
+	struct p54_common *priv = dev->priv;
+
+	if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
+		return ;
+
+	if ((brightness) && (led->registered)) {
+		led->toggled++;
+		queue_delayed_work(priv->hw->workqueue, &priv->led_work,
+				   HZ/10);
+	}
+}
+
+static int p54_register_led(struct p54_common *priv,
+			    unsigned int led_index,
+			    char *name, char *trigger)
+{
+	struct p54_led_dev *led = &priv->leds[led_index];
+	int err;
+
+	if (led->registered)
+		return -EEXIST;
+
+	snprintf(led->name, sizeof(led->name), "p54-%s::%s",
+		 wiphy_name(priv->hw->wiphy), name);
+	led->hw_dev = priv->hw;
+	led->index = led_index;
+	led->led_dev.name = led->name;
+	led->led_dev.default_trigger = trigger;
+	led->led_dev.brightness_set = p54_led_brightness_set;
+
+	err = led_classdev_register(wiphy_dev(priv->hw->wiphy), &led->led_dev);
+	if (err)
+		printk(KERN_ERR "%s: Failed to register %s LED.\n",
+			wiphy_name(priv->hw->wiphy), name);
+	else
+		led->registered = 1;
+
+	return err;
+}
+
+int p54_init_leds(struct p54_common *priv)
+{
+	int err;
+
+	/*
+	 * TODO:
+	 * Figure out if the EEPROM contains some hints about the number
+	 * of available/programmable LEDs of the device.
+	 */
+
+	INIT_DELAYED_WORK(&priv->led_work, p54_update_leds);
+
+	err = p54_register_led(priv, 0, "assoc",
+			       ieee80211_get_assoc_led_name(priv->hw));
+	if (err)
+		return err;
+
+	err = p54_register_led(priv, 1, "tx",
+			       ieee80211_get_tx_led_name(priv->hw));
+	if (err)
+		return err;
+
+	err = p54_register_led(priv, 2, "rx",
+			       ieee80211_get_rx_led_name(priv->hw));
+	if (err)
+		return err;
+
+	err = p54_register_led(priv, 3, "radio",
+			       ieee80211_get_radio_led_name(priv->hw));
+	if (err)
+		return err;
+
+	err = p54_set_leds(priv);
+	return err;
+}
+
+void p54_unregister_leds(struct p54_common *priv)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(priv->leds); i++) {
+		if (priv->leds[i].registered) {
+			priv->leds[i].registered = false;
+			priv->leds[i].toggled = 0;
+			led_classdev_unregister(&priv->leds[i].led_dev);
+		}
+	}
+
+	cancel_delayed_work_sync(&priv->led_work);
+}