drivers/net/wireless/b43legacy/leds.c - kernel/msm - Gitiles

 /*

   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 <mb@bu3sch.de>
   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 "b43legacy.h"
 #include "leds.h"


 static void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
 			    bool activelow)
 {
 	struct b43legacy_wl *wl = dev->wl;
 	unsigned long flags;
 	u16 ctl;

 	spin_lock_irqsave(&wl->leds_lock, flags);
 	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 	if (activelow)
 		ctl &= ~(1 << led_index);
 	else
 		ctl |= (1 << led_index);
 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
 	spin_unlock_irqrestore(&wl->leds_lock, flags);
 }

 static void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
 			     bool activelow)
 {
 	struct b43legacy_wl *wl = dev->wl;
 	unsigned long flags;
 	u16 ctl;

 	spin_lock_irqsave(&wl->leds_lock, flags);
 	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 	if (activelow)
 		ctl |= (1 << led_index);
 	else
 		ctl &= ~(1 << led_index);
 	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
 	spin_unlock_irqrestore(&wl->leds_lock, flags);
 }

 /* Callback from the LED subsystem. */
 static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
 				   enum led_brightness brightness)
 {
 	struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
 				    led_dev);
 	struct b43legacy_wldev *dev = led->dev;
 	bool radio_enabled;

 	/* Checking the radio-enabled status here is slightly racy,
 	 * but we want to avoid the locking overhead and we don't care
 	 * whether the LED has the wrong state for a second. */
 	radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);

 	if (brightness == LED_OFF || !radio_enabled)
 		b43legacy_led_turn_off(dev, led->index, led->activelow);
 	else
 		b43legacy_led_turn_on(dev, led->index, led->activelow);
 }

 static int b43legacy_register_led(struct b43legacy_wldev *dev,
 				  struct b43legacy_led *led,
 				  const char *name, char *default_trigger,
 				  u8 led_index, bool activelow)
 {
 	int err;

 	b43legacy_led_turn_off(dev, led_index, activelow);
 	if (led->dev)
 		return -EEXIST;
 	if (!default_trigger)
 		return -EINVAL;
 	led->dev = dev;
 	led->index = led_index;
 	led->activelow = activelow;
 	strncpy(led->name, name, sizeof(led->name));

 	led->led_dev.name = led->name;
 	led->led_dev.default_trigger = default_trigger;
 	led->led_dev.brightness_set = b43legacy_led_brightness_set;

 	err = led_classdev_register(dev->dev->dev, &led->led_dev);
 	if (err) {
 		b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
 		led->dev = NULL;
 		return err;
 	}
 	return 0;
 }

 static void b43legacy_unregister_led(struct b43legacy_led *led)
 {
 	if (!led->dev)
 		return;
 	led_classdev_unregister(&led->led_dev);
 	b43legacy_led_turn_off(led->dev, led->index, led->activelow);
 	led->dev = NULL;
 }

 static void b43legacy_map_led(struct b43legacy_wldev *dev,
 			u8 led_index,
 			enum b43legacy_led_behaviour behaviour,
 			bool activelow)
 {
 	struct ieee80211_hw *hw = dev->wl->hw;
 	char name[B43legacy_LED_MAX_NAME_LEN + 1];

 	/* Map the b43 specific LED behaviour value to the
 	 * generic LED triggers. */
 	switch (behaviour) {
 	case B43legacy_LED_INACTIVE:
 		break;
 	case B43legacy_LED_OFF:
 		b43legacy_led_turn_off(dev, led_index, activelow);
 		break;
 	case B43legacy_LED_ON:
 		b43legacy_led_turn_on(dev, led_index, activelow);
 		break;
 	case B43legacy_LED_ACTIVITY:
 	case B43legacy_LED_TRANSFER:
 	case B43legacy_LED_APTRANSFER:
 		snprintf(name, sizeof(name),
 			 "b43legacy-%s::tx", wiphy_name(hw->wiphy));
 		b43legacy_register_led(dev, &dev->led_tx, name,
 				 ieee80211_get_tx_led_name(hw),
 				 led_index, activelow);
 		snprintf(name, sizeof(name),
 			 "b43legacy-%s::rx", wiphy_name(hw->wiphy));
 		b43legacy_register_led(dev, &dev->led_rx, name,
 				 ieee80211_get_rx_led_name(hw),
 				 led_index, activelow);
 		break;
 	case B43legacy_LED_RADIO_ALL:
 	case B43legacy_LED_RADIO_A:
 	case B43legacy_LED_RADIO_B:
 	case B43legacy_LED_MODE_BG:
 		snprintf(name, sizeof(name),
 			 "b43legacy-%s::radio", wiphy_name(hw->wiphy));
 		b43legacy_register_led(dev, &dev->led_radio, name,
 				 b43legacy_rfkill_led_name(dev),
 				 led_index, activelow);
 		/* Sync the RF-kill LED state with the switch state. */
 		if (dev->radio_hw_enable)
 			b43legacy_led_turn_on(dev, led_index, activelow);
 		break;
 	case B43legacy_LED_WEIRD:
 	case B43legacy_LED_ASSOC:
 		snprintf(name, sizeof(name),
 			 "b43legacy-%s::assoc", wiphy_name(hw->wiphy));
 		b43legacy_register_led(dev, &dev->led_assoc, name,
 				 ieee80211_get_assoc_led_name(hw),
 				 led_index, activelow);
 		break;
 	default:
 		b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
 			behaviour);
 		break;
 	}
 }

 void b43legacy_leds_init(struct b43legacy_wldev *dev)
 {
 	struct ssb_bus *bus = dev->dev->bus;
 	u8 sprom[4];
 	int i;
 	enum b43legacy_led_behaviour behaviour;
 	bool activelow;

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

 	for (i = 0; i < 4; i++) {
 		if (sprom[i] == 0xFF) {
 			/* There is no LED information in the SPROM
 			 * for this LED. Hardcode it here. */
 			activelow = 0;
 			switch (i) {
 			case 0:
 				behaviour = B43legacy_LED_ACTIVITY;
 				activelow = 1;
 				if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
 					behaviour = B43legacy_LED_RADIO_ALL;
 				break;
 			case 1:
 				behaviour = B43legacy_LED_RADIO_B;
 				if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
 					behaviour = B43legacy_LED_ASSOC;
 				break;
 			case 2:
 				behaviour = B43legacy_LED_RADIO_A;
 				break;
 			case 3:
 				behaviour = B43legacy_LED_OFF;
 				break;
 			default:
 				B43legacy_WARN_ON(1);
 				return;
 			}
 		} else {
 			behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
 			activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
 		}
 		b43legacy_map_led(dev, i, behaviour, activelow);
 	}
 }

 void b43legacy_leds_exit(struct b43legacy_wldev *dev)
 {
 	b43legacy_unregister_led(&dev->led_tx);
 	b43legacy_unregister_led(&dev->led_rx);
 	b43legacy_unregister_led(&dev->led_assoc);
 	b43legacy_unregister_led(&dev->led_radio);
 }
	/*

	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 <mb@bu3sch.de>
	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 "b43legacy.h"
	#include "leds.h"


	static void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
	bool activelow)
	{
	struct b43legacy_wl *wl = dev->wl;
	unsigned long flags;
	u16 ctl;

	spin_lock_irqsave(&wl->leds_lock, flags);
	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	if (activelow)
	ctl &= ~(1 << led_index);
	else
	ctl \|= (1 << led_index);
	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
	spin_unlock_irqrestore(&wl->leds_lock, flags);
	}

	static void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
	bool activelow)
	{
	struct b43legacy_wl *wl = dev->wl;
	unsigned long flags;
	u16 ctl;

	spin_lock_irqsave(&wl->leds_lock, flags);
	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	if (activelow)
	ctl \|= (1 << led_index);
	else
	ctl &= ~(1 << led_index);
	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
	spin_unlock_irqrestore(&wl->leds_lock, flags);
	}

	/* Callback from the LED subsystem. */
	static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
	enum led_brightness brightness)
	{
	struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
	led_dev);
	struct b43legacy_wldev *dev = led->dev;
	bool radio_enabled;

	/* Checking the radio-enabled status here is slightly racy,
	* but we want to avoid the locking overhead and we don't care
	* whether the LED has the wrong state for a second. */
	radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);

	if (brightness == LED_OFF \|\| !radio_enabled)
	b43legacy_led_turn_off(dev, led->index, led->activelow);
	else
	b43legacy_led_turn_on(dev, led->index, led->activelow);
	}

	static int b43legacy_register_led(struct b43legacy_wldev *dev,
	struct b43legacy_led *led,
	const char name, char default_trigger,
	u8 led_index, bool activelow)
	{
	int err;

	b43legacy_led_turn_off(dev, led_index, activelow);
	if (led->dev)
	return -EEXIST;
	if (!default_trigger)
	return -EINVAL;
	led->dev = dev;
	led->index = led_index;
	led->activelow = activelow;
	strncpy(led->name, name, sizeof(led->name));

	led->led_dev.name = led->name;
	led->led_dev.default_trigger = default_trigger;
	led->led_dev.brightness_set = b43legacy_led_brightness_set;

	err = led_classdev_register(dev->dev->dev, &led->led_dev);
	if (err) {
	b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
	led->dev = NULL;
	return err;
	}
	return 0;
	}

	static void b43legacy_unregister_led(struct b43legacy_led *led)
	{
	if (!led->dev)
	return;
	led_classdev_unregister(&led->led_dev);
	b43legacy_led_turn_off(led->dev, led->index, led->activelow);
	led->dev = NULL;
	}

	static void b43legacy_map_led(struct b43legacy_wldev *dev,
	u8 led_index,
	enum b43legacy_led_behaviour behaviour,
	bool activelow)
	{
	struct ieee80211_hw *hw = dev->wl->hw;
	char name[B43legacy_LED_MAX_NAME_LEN + 1];

	/* Map the b43 specific LED behaviour value to the
	* generic LED triggers. */
	switch (behaviour) {
	case B43legacy_LED_INACTIVE:
	break;
	case B43legacy_LED_OFF:
	b43legacy_led_turn_off(dev, led_index, activelow);
	break;
	case B43legacy_LED_ON:
	b43legacy_led_turn_on(dev, led_index, activelow);
	break;
	case B43legacy_LED_ACTIVITY:
	case B43legacy_LED_TRANSFER:
	case B43legacy_LED_APTRANSFER:
	snprintf(name, sizeof(name),
	"b43legacy-%s::tx", wiphy_name(hw->wiphy));
	b43legacy_register_led(dev, &dev->led_tx, name,
	ieee80211_get_tx_led_name(hw),
	led_index, activelow);
	snprintf(name, sizeof(name),
	"b43legacy-%s::rx", wiphy_name(hw->wiphy));
	b43legacy_register_led(dev, &dev->led_rx, name,
	ieee80211_get_rx_led_name(hw),
	led_index, activelow);
	break;
	case B43legacy_LED_RADIO_ALL:
	case B43legacy_LED_RADIO_A:
	case B43legacy_LED_RADIO_B:
	case B43legacy_LED_MODE_BG:
	snprintf(name, sizeof(name),
	"b43legacy-%s::radio", wiphy_name(hw->wiphy));
	b43legacy_register_led(dev, &dev->led_radio, name,
	b43legacy_rfkill_led_name(dev),
	led_index, activelow);
	/* Sync the RF-kill LED state with the switch state. */
	if (dev->radio_hw_enable)
	b43legacy_led_turn_on(dev, led_index, activelow);
	break;
	case B43legacy_LED_WEIRD:
	case B43legacy_LED_ASSOC:
	snprintf(name, sizeof(name),
	"b43legacy-%s::assoc", wiphy_name(hw->wiphy));
	b43legacy_register_led(dev, &dev->led_assoc, name,
	ieee80211_get_assoc_led_name(hw),
	led_index, activelow);
	break;
	default:
	b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
	behaviour);
	break;
	}
	}

	void b43legacy_leds_init(struct b43legacy_wldev *dev)
	{
	struct ssb_bus *bus = dev->dev->bus;
	u8 sprom[4];
	int i;
	enum b43legacy_led_behaviour behaviour;
	bool activelow;

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

	for (i = 0; i < 4; i++) {
	if (sprom[i] == 0xFF) {
	/* There is no LED information in the SPROM
	* for this LED. Hardcode it here. */
	activelow = 0;
	switch (i) {
	case 0:
	behaviour = B43legacy_LED_ACTIVITY;
	activelow = 1;
	if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
	behaviour = B43legacy_LED_RADIO_ALL;
	break;
	case 1:
	behaviour = B43legacy_LED_RADIO_B;
	if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
	behaviour = B43legacy_LED_ASSOC;
	break;
	case 2:
	behaviour = B43legacy_LED_RADIO_A;
	break;
	case 3:
	behaviour = B43legacy_LED_OFF;
	break;
	default:
	B43legacy_WARN_ON(1);
	return;
	}
	} else {
	behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
	activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
	}
	b43legacy_map_led(dev, i, behaviour, activelow);
	}
	}

	void b43legacy_leds_exit(struct b43legacy_wldev *dev)
	{
	b43legacy_unregister_led(&dev->led_tx);
	b43legacy_unregister_led(&dev->led_rx);
	b43legacy_unregister_led(&dev->led_assoc);
	b43legacy_unregister_led(&dev->led_radio);
	}