drivers/net/wireless/b43legacy/leds.c - maze/linux - Git at Google

 /*

   Broadcom B43legacy wireless driver

   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
 		     Stefano Brivio <st3@riseup.net>
 		     Michael Buesch <mb@bu3sch.de>
 		     Danny van Dyk <kugelfang@gentoo.org>
 		     Andreas Jaggi <andreas.jaggi@waterwave.ch>
   Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>

   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 "leds.h"
 #include "b43legacy.h"
 #include "main.h"

 static void b43legacy_led_changestate(struct b43legacy_led *led)
 {
 	struct b43legacy_wldev *dev = led->dev;
 	const int index = led->index;
 	u16 ledctl;

 	B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
 	B43legacy_WARN_ON(!led->blink_interval);
 	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 	ledctl ^= (1 << index);
 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
 }

 static void b43legacy_led_blink(unsigned long d)
 {
 	struct b43legacy_led *led = (struct b43legacy_led *)d;
 	struct b43legacy_wldev *dev = led->dev;
 	unsigned long flags;

 	spin_lock_irqsave(&dev->wl->leds_lock, flags);
 	if (led->blink_interval) {
 		b43legacy_led_changestate(led);
 		mod_timer(&led->blink_timer, jiffies + led->blink_interval);
 	}
 	spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 }

 static void b43legacy_led_blink_start(struct b43legacy_led *led,
 				      unsigned long interval)
 {
 	if (led->blink_interval)
 		return;
 	led->blink_interval = interval;
 	b43legacy_led_changestate(led);
 	led->blink_timer.expires = jiffies + interval;
 	add_timer(&led->blink_timer);
 }

 static void b43legacy_led_blink_stop(struct b43legacy_led *led, int sync)
 {
 	struct b43legacy_wldev *dev = led->dev;
 	const int index = led->index;
 	u16 ledctl;

 	if (!led->blink_interval)
 		return;
 	if (unlikely(sync))
 		del_timer_sync(&led->blink_timer);
 	else
 		del_timer(&led->blink_timer);
 	led->blink_interval = 0;

 	/* Make sure the LED is turned off. */
 	B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
 	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 	if (led->activelow)
 		ledctl |= (1 << index);
 	else
 		ledctl &= ~(1 << index);
 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
 }

 static void b43legacy_led_init_hardcoded(struct b43legacy_wldev *dev,
 					 struct b43legacy_led *led,
 					 int led_index)
 {
 	struct ssb_bus *bus = dev->dev->bus;

 	/* This function is called, if the behaviour (and activelow)
 	 * information for a LED is missing in the SPROM.
 	 * We hardcode the behaviour values for various devices here.
 	 * Note that the B43legacy_LED_TEST_XXX behaviour values can
 	 * be used to figure out which led is mapped to which index.
 	 */

 	switch (led_index) {
 	case 0:
 		led->behaviour = B43legacy_LED_ACTIVITY;
 		led->activelow = 1;
 		if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
 			led->behaviour = B43legacy_LED_RADIO_ALL;
 		break;
 	case 1:
 		led->behaviour = B43legacy_LED_RADIO_B;
 		if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
 			led->behaviour = B43legacy_LED_ASSOC;
 		break;
 	case 2:
 		led->behaviour = B43legacy_LED_RADIO_A;
 		break;
 	case 3:
 		led->behaviour = B43legacy_LED_OFF;
 		break;
 	default:
 		B43legacy_BUG_ON(1);
 	}
 }

 int b43legacy_leds_init(struct b43legacy_wldev *dev)
 {
 	struct b43legacy_led *led;
 	u8 sprom[4];
 	int i;

 	sprom[0] = dev->dev->bus->sprom.r1.gpio0;
 	sprom[1] = dev->dev->bus->sprom.r1.gpio1;
 	sprom[2] = dev->dev->bus->sprom.r1.gpio2;
 	sprom[3] = dev->dev->bus->sprom.r1.gpio3;

 	for (i = 0; i < B43legacy_NR_LEDS; i++) {
 		led = &(dev->leds[i]);
 		led->index = i;
 		led->dev = dev;
 		setup_timer(&led->blink_timer,
 			    b43legacy_led_blink,
 			    (unsigned long)led);

 		if (sprom[i] == 0xFF)
 			b43legacy_led_init_hardcoded(dev, led, i);
 		else {
 			led->behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
 			led->activelow = !!(sprom[i] &
 					   B43legacy_LED_ACTIVELOW);
 		}
 	}

 	return 0;
 }

 void b43legacy_leds_exit(struct b43legacy_wldev *dev)
 {
 	struct b43legacy_led *led;
 	int i;

 	for (i = 0; i < B43legacy_NR_LEDS; i++) {
 		led = &(dev->leds[i]);
 		b43legacy_led_blink_stop(led, 1);
 	}
 	b43legacy_leds_switch_all(dev, 0);
 }

 void b43legacy_leds_update(struct b43legacy_wldev *dev, int activity)
 {
 	struct b43legacy_led *led;
 	struct b43legacy_phy *phy = &dev->phy;
 	const int transferring = (jiffies - dev->stats.last_tx)
 				  < B43legacy_LED_XFER_THRES;
 	int i;
 	int turn_on;
 	unsigned long interval = 0;
 	u16 ledctl;
 	unsigned long flags;
 	bool radio_enabled = (phy->radio_on && dev->radio_hw_enable);

 	spin_lock_irqsave(&dev->wl->leds_lock, flags);
 	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 	for (i = 0; i < B43legacy_NR_LEDS; i++) {
 		led = &(dev->leds[i]);

 		turn_on = 0;
 		switch (led->behaviour) {
 		case B43legacy_LED_INACTIVE:
 			continue;
 		case B43legacy_LED_OFF:
 			break;
 		case B43legacy_LED_ON:
 			turn_on = 1;
 			break;
 		case B43legacy_LED_ACTIVITY:
 			turn_on = activity;
 			break;
 		case B43legacy_LED_RADIO_ALL:
 			turn_on = radio_enabled;
 			break;
 		case B43legacy_LED_RADIO_A:
 			break;
 		case B43legacy_LED_RADIO_B:
 			turn_on = radio_enabled;
 			break;
 		case B43legacy_LED_MODE_BG:
 			if (phy->type == B43legacy_PHYTYPE_G && radio_enabled)
 				turn_on = 1;
 			break;
 		case B43legacy_LED_TRANSFER:
 			if (transferring)
 				b43legacy_led_blink_start(led,
 						B43legacy_LEDBLINK_MEDIUM);
 			else
 				b43legacy_led_blink_stop(led, 0);
 			continue;
 		case B43legacy_LED_APTRANSFER:
 			if (b43legacy_is_mode(dev->wl,
 						IEEE80211_IF_TYPE_AP)) {
 				if (transferring) {
 					interval = B43legacy_LEDBLINK_FAST;
 					turn_on = 1;
 				}
 			} else {
 				turn_on = 1;
 				if (transferring)
 					interval = B43legacy_LEDBLINK_FAST;
 				else
 					turn_on = 0;
 			}
 			if (turn_on)
 				b43legacy_led_blink_start(led, interval);
 			else
 				b43legacy_led_blink_stop(led, 0);
 			continue;
 		case B43legacy_LED_WEIRD:
 			break;
 		case B43legacy_LED_ASSOC:
 			turn_on = 1;
 #ifdef CONFIG_B43LEGACY_DEBUG
 		case B43legacy_LED_TEST_BLINKSLOW:
 			b43legacy_led_blink_start(led, B43legacy_LEDBLINK_SLOW);
 			continue;
 		case B43legacy_LED_TEST_BLINKMEDIUM:
 			b43legacy_led_blink_start(led,
 						   B43legacy_LEDBLINK_MEDIUM);
 			continue;
 		case B43legacy_LED_TEST_BLINKFAST:
 			b43legacy_led_blink_start(led, B43legacy_LEDBLINK_FAST);
 			continue;
 #endif /* CONFIG_B43LEGACY_DEBUG */
 		default:
 			B43legacy_BUG_ON(1);
 		};

 		if (led->activelow)
 			turn_on = !turn_on;
 		if (turn_on)
 			ledctl |= (1 << i);
 		else
 			ledctl &= ~(1 << i);
 	}
 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
 	spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 }

 void b43legacy_leds_switch_all(struct b43legacy_wldev *dev, int on)
 {
 	struct b43legacy_led *led;
 	u16 ledctl;
 	int i;
 	int bit_on;
 	unsigned long flags;

 	spin_lock_irqsave(&dev->wl->leds_lock, flags);
 	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 	for (i = 0; i < B43legacy_NR_LEDS; i++) {
 		led = &(dev->leds[i]);
 		if (led->behaviour == B43legacy_LED_INACTIVE)
 			continue;
 		if (on)
 			bit_on = led->activelow ? 0 : 1;
 		else
 			bit_on = led->activelow ? 1 : 0;
 		if (bit_on)
 			ledctl |= (1 << i);
 		else
 			ledctl &= ~(1 << i);
 	}
 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
 	spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 }
	/*

	Broadcom B43legacy wireless driver

	Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
	Stefano Brivio <st3@riseup.net>
	Michael Buesch <mb@bu3sch.de>
	Danny van Dyk <kugelfang@gentoo.org>
	Andreas Jaggi <andreas.jaggi@waterwave.ch>
	Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>

	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 "leds.h"
	#include "b43legacy.h"
	#include "main.h"

	static void b43legacy_led_changestate(struct b43legacy_led *led)
	{
	struct b43legacy_wldev *dev = led->dev;
	const int index = led->index;
	u16 ledctl;

	B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
	B43legacy_WARN_ON(!led->blink_interval);
	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	ledctl ^= (1 << index);
	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
	}

	static void b43legacy_led_blink(unsigned long d)
	{
	struct b43legacy_led led = (struct b43legacy_led )d;
	struct b43legacy_wldev *dev = led->dev;
	unsigned long flags;

	spin_lock_irqsave(&dev->wl->leds_lock, flags);
	if (led->blink_interval) {
	b43legacy_led_changestate(led);
	mod_timer(&led->blink_timer, jiffies + led->blink_interval);
	}
	spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
	}

	static void b43legacy_led_blink_start(struct b43legacy_led *led,
	unsigned long interval)
	{
	if (led->blink_interval)
	return;
	led->blink_interval = interval;
	b43legacy_led_changestate(led);
	led->blink_timer.expires = jiffies + interval;
	add_timer(&led->blink_timer);
	}

	static void b43legacy_led_blink_stop(struct b43legacy_led *led, int sync)
	{
	struct b43legacy_wldev *dev = led->dev;
	const int index = led->index;
	u16 ledctl;

	if (!led->blink_interval)
	return;
	if (unlikely(sync))
	del_timer_sync(&led->blink_timer);
	else
	del_timer(&led->blink_timer);
	led->blink_interval = 0;

	/* Make sure the LED is turned off. */
	B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	if (led->activelow)
	ledctl \|= (1 << index);
	else
	ledctl &= ~(1 << index);
	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
	}

	static void b43legacy_led_init_hardcoded(struct b43legacy_wldev *dev,
	struct b43legacy_led *led,
	int led_index)
	{
	struct ssb_bus *bus = dev->dev->bus;

	/* This function is called, if the behaviour (and activelow)
	* information for a LED is missing in the SPROM.
	* We hardcode the behaviour values for various devices here.
	* Note that the B43legacy_LED_TEST_XXX behaviour values can
	* be used to figure out which led is mapped to which index.
	*/

	switch (led_index) {
	case 0:
	led->behaviour = B43legacy_LED_ACTIVITY;
	led->activelow = 1;
	if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
	led->behaviour = B43legacy_LED_RADIO_ALL;
	break;
	case 1:
	led->behaviour = B43legacy_LED_RADIO_B;
	if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
	led->behaviour = B43legacy_LED_ASSOC;
	break;
	case 2:
	led->behaviour = B43legacy_LED_RADIO_A;
	break;
	case 3:
	led->behaviour = B43legacy_LED_OFF;
	break;
	default:
	B43legacy_BUG_ON(1);
	}
	}

	int b43legacy_leds_init(struct b43legacy_wldev *dev)
	{
	struct b43legacy_led *led;
	u8 sprom[4];
	int i;

	sprom[0] = dev->dev->bus->sprom.r1.gpio0;
	sprom[1] = dev->dev->bus->sprom.r1.gpio1;
	sprom[2] = dev->dev->bus->sprom.r1.gpio2;
	sprom[3] = dev->dev->bus->sprom.r1.gpio3;

	for (i = 0; i < B43legacy_NR_LEDS; i++) {
	led = &(dev->leds[i]);
	led->index = i;
	led->dev = dev;
	setup_timer(&led->blink_timer,
	b43legacy_led_blink,
	(unsigned long)led);

	if (sprom[i] == 0xFF)
	b43legacy_led_init_hardcoded(dev, led, i);
	else {
	led->behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
	led->activelow = !!(sprom[i] &
	B43legacy_LED_ACTIVELOW);
	}
	}

	return 0;
	}

	void b43legacy_leds_exit(struct b43legacy_wldev *dev)
	{
	struct b43legacy_led *led;
	int i;

	for (i = 0; i < B43legacy_NR_LEDS; i++) {
	led = &(dev->leds[i]);
	b43legacy_led_blink_stop(led, 1);
	}
	b43legacy_leds_switch_all(dev, 0);
	}

	void b43legacy_leds_update(struct b43legacy_wldev *dev, int activity)
	{
	struct b43legacy_led *led;
	struct b43legacy_phy *phy = &dev->phy;
	const int transferring = (jiffies - dev->stats.last_tx)
	< B43legacy_LED_XFER_THRES;
	int i;
	int turn_on;
	unsigned long interval = 0;
	u16 ledctl;
	unsigned long flags;
	bool radio_enabled = (phy->radio_on && dev->radio_hw_enable);

	spin_lock_irqsave(&dev->wl->leds_lock, flags);
	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	for (i = 0; i < B43legacy_NR_LEDS; i++) {
	led = &(dev->leds[i]);

	turn_on = 0;
	switch (led->behaviour) {
	case B43legacy_LED_INACTIVE:
	continue;
	case B43legacy_LED_OFF:
	break;
	case B43legacy_LED_ON:
	turn_on = 1;
	break;
	case B43legacy_LED_ACTIVITY:
	turn_on = activity;
	break;
	case B43legacy_LED_RADIO_ALL:
	turn_on = radio_enabled;
	break;
	case B43legacy_LED_RADIO_A:
	break;
	case B43legacy_LED_RADIO_B:
	turn_on = radio_enabled;
	break;
	case B43legacy_LED_MODE_BG:
	if (phy->type == B43legacy_PHYTYPE_G && radio_enabled)
	turn_on = 1;
	break;
	case B43legacy_LED_TRANSFER:
	if (transferring)
	b43legacy_led_blink_start(led,
	B43legacy_LEDBLINK_MEDIUM);
	else
	b43legacy_led_blink_stop(led, 0);
	continue;
	case B43legacy_LED_APTRANSFER:
	if (b43legacy_is_mode(dev->wl,
	IEEE80211_IF_TYPE_AP)) {
	if (transferring) {
	interval = B43legacy_LEDBLINK_FAST;
	turn_on = 1;
	}
	} else {
	turn_on = 1;
	if (transferring)
	interval = B43legacy_LEDBLINK_FAST;
	else
	turn_on = 0;
	}
	if (turn_on)
	b43legacy_led_blink_start(led, interval);
	else
	b43legacy_led_blink_stop(led, 0);
	continue;
	case B43legacy_LED_WEIRD:
	break;
	case B43legacy_LED_ASSOC:
	turn_on = 1;
	#ifdef CONFIG_B43LEGACY_DEBUG
	case B43legacy_LED_TEST_BLINKSLOW:
	b43legacy_led_blink_start(led, B43legacy_LEDBLINK_SLOW);
	continue;
	case B43legacy_LED_TEST_BLINKMEDIUM:
	b43legacy_led_blink_start(led,
	B43legacy_LEDBLINK_MEDIUM);
	continue;
	case B43legacy_LED_TEST_BLINKFAST:
	b43legacy_led_blink_start(led, B43legacy_LEDBLINK_FAST);
	continue;
	#endif /* CONFIG_B43LEGACY_DEBUG */
	default:
	B43legacy_BUG_ON(1);
	};

	if (led->activelow)
	turn_on = !turn_on;
	if (turn_on)
	ledctl \|= (1 << i);
	else
	ledctl &= ~(1 << i);
	}
	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
	spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
	}

	void b43legacy_leds_switch_all(struct b43legacy_wldev *dev, int on)
	{
	struct b43legacy_led *led;
	u16 ledctl;
	int i;
	int bit_on;
	unsigned long flags;

	spin_lock_irqsave(&dev->wl->leds_lock, flags);
	ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	for (i = 0; i < B43legacy_NR_LEDS; i++) {
	led = &(dev->leds[i]);
	if (led->behaviour == B43legacy_LED_INACTIVE)
	continue;
	if (on)
	bit_on = led->activelow ? 0 : 1;
	else
	bit_on = led->activelow ? 1 : 0;
	if (bit_on)
	ledctl \|= (1 << i);
	else
	ledctl &= ~(1 << i);
	}
	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
	spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
	}