1 files changed, 359 insertions, 0 deletions

diff --git a/drivers/net/wireless/broadcom/b43/leds.c b/drivers/net/wireless/broadcom/b43/leds.c
new file mode 100644
index 000000000000..d79ab2a227e1
--- /dev/null
+++ b/drivers/net/wireless/broadcom/b43/leds.c
@@ -0,0 +1,359 @@
+/*
+
+  Broadcom B43 wireless driver
+  LED control
+
+  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
+  Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it>
+  Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
+  Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
+  Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
+
+  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; see the file COPYING.  If not, write to
+  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+
+*/
+
+#include "b43.h"
+#include "leds.h"
+#include "rfkill.h"
+
+
+static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
+			    bool activelow)
+{
+	u16 ctl;
+
+	ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
+	if (activelow)
+		ctl &= ~(1 << led_index);
+	else
+		ctl |= (1 << led_index);
+	b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
+}
+
+static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
+			     bool activelow)
+{
+	u16 ctl;
+
+	ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
+	if (activelow)
+		ctl |= (1 << led_index);
+	else
+		ctl &= ~(1 << led_index);
+	b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
+}
+
+static void b43_led_update(struct b43_wldev *dev,
+			   struct b43_led *led)
+{
+	bool radio_enabled;
+	bool turn_on;
+
+	if (!led->wl)
+		return;
+
+	radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
+
+	/* The led->state read is racy, but we don't care. In case we raced
+	 * with the brightness_set handler, we will be called again soon
+	 * to fixup our state. */
+	if (radio_enabled)
+		turn_on = atomic_read(&led->state) != LED_OFF;
+	else
+		turn_on = false;
+	if (turn_on == led->hw_state)
+		return;
+	led->hw_state = turn_on;
+
+	if (turn_on)
+		b43_led_turn_on(dev, led->index, led->activelow);
+	else
+		b43_led_turn_off(dev, led->index, led->activelow);
+}
+
+static void b43_leds_work(struct work_struct *work)
+{
+	struct b43_leds *leds = container_of(work, struct b43_leds, work);
+	struct b43_wl *wl = container_of(leds, struct b43_wl, leds);
+	struct b43_wldev *dev;
+
+	mutex_lock(&wl->mutex);
+	dev = wl->current_dev;
+	if (unlikely(!dev || b43_status(dev) < B43_STAT_STARTED))
+		goto out_unlock;
+
+	b43_led_update(dev, &wl->leds.led_tx);
+	b43_led_update(dev, &wl->leds.led_rx);
+	b43_led_update(dev, &wl->leds.led_radio);
+	b43_led_update(dev, &wl->leds.led_assoc);
+
+out_unlock:
+	mutex_unlock(&wl->mutex);
+}
+
+/* Callback from the LED subsystem. */
+static void b43_led_brightness_set(struct led_classdev *led_dev,
+				   enum led_brightness brightness)
+{
+	struct b43_led *led = container_of(led_dev, struct b43_led, led_dev);
+	struct b43_wl *wl = led->wl;
+
+	if (likely(!wl->leds.stop)) {
+		atomic_set(&led->state, brightness);
+		ieee80211_queue_work(wl->hw, &wl->leds.work);
+	}
+}
+
+static int b43_register_led(struct b43_wldev *dev, struct b43_led *led,
+			    const char *name, const char *default_trigger,
+			    u8 led_index, bool activelow)
+{
+	int err;
+
+	if (led->wl)
+		return -EEXIST;
+	if (!default_trigger)
+		return -EINVAL;
+	led->wl = dev->wl;
+	led->index = led_index;
+	led->activelow = activelow;
+	strncpy(led->name, name, sizeof(led->name));
+	atomic_set(&led->state, 0);
+
+	led->led_dev.name = led->name;
+	led->led_dev.default_trigger = default_trigger;
+	led->led_dev.brightness_set = b43_led_brightness_set;
+
+	err = led_classdev_register(dev->dev->dev, &led->led_dev);
+	if (err) {
+		b43warn(dev->wl, "LEDs: Failed to register %s\n", name);
+		led->wl = NULL;
+		return err;
+	}
+
+	return 0;
+}
+
+static void b43_unregister_led(struct b43_led *led)
+{
+	if (!led->wl)
+		return;
+	led_classdev_unregister(&led->led_dev);
+	led->wl = NULL;
+}
+
+static void b43_map_led(struct b43_wldev *dev,
+			u8 led_index,
+			enum b43_led_behaviour behaviour,
+			bool activelow)
+{
+	struct ieee80211_hw *hw = dev->wl->hw;
+	char name[B43_LED_MAX_NAME_LEN + 1];
+
+	/* Map the b43 specific LED behaviour value to the
+	 * generic LED triggers. */
+	switch (behaviour) {
+	case B43_LED_INACTIVE:
+	case B43_LED_OFF:
+	case B43_LED_ON:
+		break;
+	case B43_LED_ACTIVITY:
+	case B43_LED_TRANSFER:
+	case B43_LED_APTRANSFER:
+		snprintf(name, sizeof(name),
+			 "b43-%s::tx", wiphy_name(hw->wiphy));
+		b43_register_led(dev, &dev->wl->leds.led_tx, name,
+				 ieee80211_get_tx_led_name(hw),
+				 led_index, activelow);
+		snprintf(name, sizeof(name),
+			 "b43-%s::rx", wiphy_name(hw->wiphy));
+		b43_register_led(dev, &dev->wl->leds.led_rx, name,
+				 ieee80211_get_rx_led_name(hw),
+				 led_index, activelow);
+		break;
+	case B43_LED_RADIO_ALL:
+	case B43_LED_RADIO_A:
+	case B43_LED_RADIO_B:
+	case B43_LED_MODE_BG:
+		snprintf(name, sizeof(name),
+			 "b43-%s::radio", wiphy_name(hw->wiphy));
+		b43_register_led(dev, &dev->wl->leds.led_radio, name,
+				 ieee80211_get_radio_led_name(hw),
+				 led_index, activelow);
+		break;
+	case B43_LED_WEIRD:
+	case B43_LED_ASSOC:
+		snprintf(name, sizeof(name),
+			 "b43-%s::assoc", wiphy_name(hw->wiphy));
+		b43_register_led(dev, &dev->wl->leds.led_assoc, name,
+				 ieee80211_get_assoc_led_name(hw),
+				 led_index, activelow);
+		break;
+	default:
+		b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
+			behaviour);
+		break;
+	}
+}
+
+static void b43_led_get_sprominfo(struct b43_wldev *dev,
+				  unsigned int led_index,
+				  enum b43_led_behaviour *behaviour,
+				  bool *activelow)
+{
+	u8 sprom[4];
+
+	sprom[0] = dev->dev->bus_sprom->gpio0;
+	sprom[1] = dev->dev->bus_sprom->gpio1;
+	sprom[2] = dev->dev->bus_sprom->gpio2;
+	sprom[3] = dev->dev->bus_sprom->gpio3;
+
+	if (sprom[led_index] == 0xFF) {
+		/* There is no LED information in the SPROM
+		 * for this LED. Hardcode it here. */
+		*activelow = false;
+		switch (led_index) {
+		case 0:
+			*behaviour = B43_LED_ACTIVITY;
+			*activelow = true;
+			if (dev->dev->board_vendor == PCI_VENDOR_ID_COMPAQ)
+				*behaviour = B43_LED_RADIO_ALL;
+			break;
+		case 1:
+			*behaviour = B43_LED_RADIO_B;
+			if (dev->dev->board_vendor == PCI_VENDOR_ID_ASUSTEK)
+				*behaviour = B43_LED_ASSOC;
+			break;
+		case 2:
+			*behaviour = B43_LED_RADIO_A;
+			break;
+		case 3:
+			*behaviour = B43_LED_OFF;
+			break;
+		default:
+			*behaviour = B43_LED_OFF;
+			B43_WARN_ON(1);
+			return;
+		}
+	} else {
+		*behaviour = sprom[led_index] & B43_LED_BEHAVIOUR;
+		*activelow = !!(sprom[led_index] & B43_LED_ACTIVELOW);
+	}
+}
+
+void b43_leds_init(struct b43_wldev *dev)
+{
+	struct b43_led *led;
+	unsigned int i;
+	enum b43_led_behaviour behaviour;
+	bool activelow;
+
+	/* Sync the RF-kill LED state (if we have one) with radio and switch states. */
+	led = &dev->wl->leds.led_radio;
+	if (led->wl) {
+		if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev)) {
+			b43_led_turn_on(dev, led->index, led->activelow);
+			led->hw_state = true;
+			atomic_set(&led->state, 1);
+		} else {
+			b43_led_turn_off(dev, led->index, led->activelow);
+			led->hw_state = false;
+			atomic_set(&led->state, 0);
+		}
+	}
+
+	/* Initialize TX/RX/ASSOC leds */
+	led = &dev->wl->leds.led_tx;
+	if (led->wl) {
+		b43_led_turn_off(dev, led->index, led->activelow);
+		led->hw_state = false;
+		atomic_set(&led->state, 0);
+	}
+	led = &dev->wl->leds.led_rx;
+	if (led->wl) {
+		b43_led_turn_off(dev, led->index, led->activelow);
+		led->hw_state = false;
+		atomic_set(&led->state, 0);
+	}
+	led = &dev->wl->leds.led_assoc;
+	if (led->wl) {
+		b43_led_turn_off(dev, led->index, led->activelow);
+		led->hw_state = false;
+		atomic_set(&led->state, 0);
+	}
+
+	/* Initialize other LED states. */
+	for (i = 0; i < B43_MAX_NR_LEDS; i++) {
+		b43_led_get_sprominfo(dev, i, &behaviour, &activelow);
+		switch (behaviour) {
+		case B43_LED_OFF:
+			b43_led_turn_off(dev, i, activelow);
+			break;
+		case B43_LED_ON:
+			b43_led_turn_on(dev, i, activelow);
+			break;
+		default:
+			/* Leave others as-is. */
+			break;
+		}
+	}
+
+	dev->wl->leds.stop = 0;
+}
+
+void b43_leds_exit(struct b43_wldev *dev)
+{
+	struct b43_leds *leds = &dev->wl->leds;
+
+	b43_led_turn_off(dev, leds->led_tx.index, leds->led_tx.activelow);
+	b43_led_turn_off(dev, leds->led_rx.index, leds->led_rx.activelow);
+	b43_led_turn_off(dev, leds->led_assoc.index, leds->led_assoc.activelow);
+	b43_led_turn_off(dev, leds->led_radio.index, leds->led_radio.activelow);
+}
+
+void b43_leds_stop(struct b43_wldev *dev)
+{
+	struct b43_leds *leds = &dev->wl->leds;
+
+	leds->stop = 1;
+	cancel_work_sync(&leds->work);
+}
+
+void b43_leds_register(struct b43_wldev *dev)
+{
+	unsigned int i;
+	enum b43_led_behaviour behaviour;
+	bool activelow;
+
+	INIT_WORK(&dev->wl->leds.work, b43_leds_work);
+
+	/* Register the LEDs to the LED subsystem. */
+	for (i = 0; i < B43_MAX_NR_LEDS; i++) {
+		b43_led_get_sprominfo(dev, i, &behaviour, &activelow);
+		b43_map_led(dev, i, behaviour, activelow);
+	}
+}
+
+void b43_leds_unregister(struct b43_wl *wl)
+{
+	struct b43_leds *leds = &wl->leds;
+
+	b43_unregister_led(&leds->led_tx);
+	b43_unregister_led(&leds->led_rx);
+	b43_unregister_led(&leds->led_assoc);
+	b43_unregister_led(&leds->led_radio);
+}