[linux-block.git] / drivers / net / wireless / b43 / leds.c

/*

  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 "b43.h"
#include "leds.h"
#include "rfkill.h"


static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
			    bool activelow)
{
	struct b43_wl *wl = dev->wl;
	unsigned long flags;
	u16 ctl;

	spin_lock_irqsave(&wl->leds_lock, flags);
	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);
	spin_unlock_irqrestore(&wl->leds_lock, flags);
}

static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
			     bool activelow)
{
	struct b43_wl *wl = dev->wl;
	unsigned long flags;
	u16 ctl;

	spin_lock_irqsave(&wl->leds_lock, flags);
	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);
	spin_unlock_irqrestore(&wl->leds_lock, flags);
}

/* 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_wldev *dev = led->dev;
	bool radio_enabled;

	if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED))
		return;

	/* 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)
		b43_led_turn_off(dev, led->index, led->activelow);
	else
		b43_led_turn_on(dev, led->index, led->activelow);
}

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;

	b43_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 = 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->dev = NULL;
		return err;
	}
	return 0;
}

static void b43_unregister_led(struct b43_led *led)
{
	if (!led->dev)
		return;
	led_classdev_unregister(&led->led_dev);
	b43_led_turn_off(led->dev, led->index, led->activelow);
	led->dev = 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:
		break;
	case B43_LED_OFF:
		b43_led_turn_off(dev, led_index, activelow);
		break;
	case B43_LED_ON:
		b43_led_turn_on(dev, led_index, activelow);
		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->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->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->led_radio, name,
				 ieee80211_get_radio_led_name(hw),
				 led_index, activelow);
		/* Sync the RF-kill LED state with radio and switch states. */
		if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev))
			b43_led_turn_on(dev, 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->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;
	}
}

void b43_leds_init(struct b43_wldev *dev)
{
	struct ssb_bus *bus = dev->dev->bus;
	u8 sprom[4];
	int i;
	enum b43_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 = B43_LED_ACTIVITY;
				activelow = 1;
				if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
					behaviour = B43_LED_RADIO_ALL;
				break;
			case 1:
				behaviour = B43_LED_RADIO_B;
				if (bus->boardinfo.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:
				B43_WARN_ON(1);
				return;
			}
		} else {
			behaviour = sprom[i] & B43_LED_BEHAVIOUR;
			activelow = !!(sprom[i] & B43_LED_ACTIVELOW);
		}
		b43_map_led(dev, i, behaviour, activelow);
	}
}

void b43_leds_exit(struct b43_wldev *dev)
{
	b43_unregister_led(&dev->led_tx);
	b43_unregister_led(&dev->led_rx);
	b43_unregister_led(&dev->led_assoc);
	b43_unregister_led(&dev->led_radio);
}
Commit	Line	Data
e4d6b795 MB	1	/*
	2
	3	Broadcom B43 wireless driver
21954c36	4	LED control
e4d6b795 MB	5
e4d6b795 MB	6	Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
1f21ad2a	7	Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it>
21954c36 MB	8	Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
	9	Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
	10	Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
e4d6b795 MB	11
	12	This program is free software; you can redistribute it and/or modify
	13	it under the terms of the GNU General Public License as published by
	14	the Free Software Foundation; either version 2 of the License, or
	15	(at your option) any later version.
	16
	17	This program is distributed in the hope that it will be useful,
	18	but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	GNU General Public License for more details.
	21
	22	You should have received a copy of the GNU General Public License
	23	along with this program; see the file COPYING. If not, write to
	24	the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
	25	Boston, MA 02110-1301, USA.
	26
	27	*/
	28
	29	#include "b43.h"
	30	#include "leds.h"
f41f3f37	31	#include "rfkill.h"
e4d6b795	32
e4d6b795	33
21954c36 MB	34	static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
21954c36 MB	35	bool activelow)
e4d6b795	36	{
21954c36	37	struct b43_wl *wl = dev->wl;
e4d6b795	38	unsigned long flags;
21954c36	39	u16 ctl;
e4d6b795	40
21954c36 MB	41	spin_lock_irqsave(&wl->leds_lock, flags);
	42	ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
	43	if (activelow)
	44	ctl &= ~(1 << led_index);
	45	else
	46	ctl \|= (1 << led_index);
	47	b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
	48	spin_unlock_irqrestore(&wl->leds_lock, flags);
e4d6b795 MB	49	}
e4d6b795 MB	50
21954c36 MB	51	static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
21954c36 MB	52	bool activelow)
e4d6b795	53	{
21954c36 MB	54	struct b43_wl *wl = dev->wl;
	55	unsigned long flags;
	56	u16 ctl;
	57
	58	spin_lock_irqsave(&wl->leds_lock, flags);
	59	ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
	60	if (activelow)
	61	ctl \|= (1 << led_index);
	62	else
	63	ctl &= ~(1 << led_index);
	64	b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
	65	spin_unlock_irqrestore(&wl->leds_lock, flags);
e4d6b795 MB	66	}
e4d6b795 MB	67
21954c36 MB	68	/* Callback from the LED subsystem. */
	69	static void b43_led_brightness_set(struct led_classdev *led_dev,
	70	enum led_brightness brightness)
e4d6b795	71	{
21954c36	72	struct b43_led *led = container_of(led_dev, struct b43_led, led_dev);
e4d6b795	73	struct b43_wldev *dev = led->dev;
21954c36	74	bool radio_enabled;
e4d6b795	75
7b3abfc8 MB	76	if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED))
	77	return;
	78
21954c36 MB	79	/* Checking the radio-enabled status here is slightly racy,
	80	* but we want to avoid the locking overhead and we don't care
	81	* whether the LED has the wrong state for a second. */
	82	radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
e4d6b795	83
21954c36 MB	84	if (brightness == LED_OFF \|\| !radio_enabled)
21954c36 MB	85	b43_led_turn_off(dev, led->index, led->activelow);
e4d6b795	86	else
21954c36	87	b43_led_turn_on(dev, led->index, led->activelow);
e4d6b795 MB	88	}
e4d6b795 MB	89
21954c36	90	static int b43_register_led(struct b43_wldev dev, struct b43_led led,
19d337df	91	const char name, const char default_trigger,
21954c36	92	u8 led_index, bool activelow)
e4d6b795	93	{
21954c36 MB	94	int err;
	95
	96	b43_led_turn_off(dev, led_index, activelow);
	97	if (led->dev)
	98	return -EEXIST;
	99	if (!default_trigger)
	100	return -EINVAL;
	101	led->dev = dev;
	102	led->index = led_index;
	103	led->activelow = activelow;
	104	strncpy(led->name, name, sizeof(led->name));
	105
	106	led->led_dev.name = led->name;
	107	led->led_dev.default_trigger = default_trigger;
	108	led->led_dev.brightness_set = b43_led_brightness_set;
	109
	110	err = led_classdev_register(dev->dev->dev, &led->led_dev);
	111	if (err) {
	112	b43warn(dev->wl, "LEDs: Failed to register %s\n", name);
	113	led->dev = NULL;
	114	return err;
	115	}
	116	return 0;
	117	}
	118
	119	static void b43_unregister_led(struct b43_led *led)
	120	{
	121	if (!led->dev)
	122	return;
b844eba2	123	led_classdev_unregister(&led->led_dev);
21954c36 MB	124	b43_led_turn_off(led->dev, led->index, led->activelow);
	125	led->dev = NULL;
	126	}
e4d6b795	127
21954c36 MB	128	static void b43_map_led(struct b43_wldev *dev,
	129	u8 led_index,
	130	enum b43_led_behaviour behaviour,
	131	bool activelow)
	132	{
	133	struct ieee80211_hw *hw = dev->wl->hw;
	134	char name[B43_LED_MAX_NAME_LEN + 1];
e4d6b795	135
21954c36 MB	136	/* Map the b43 specific LED behaviour value to the
	137	* generic LED triggers. */
	138	switch (behaviour) {
	139	case B43_LED_INACTIVE:
	140	break;
	141	case B43_LED_OFF:
	142	b43_led_turn_off(dev, led_index, activelow);
e4d6b795	143	break;
21954c36 MB	144	case B43_LED_ON:
21954c36 MB	145	b43_led_turn_on(dev, led_index, activelow);
e4d6b795	146	break;
21954c36 MB	147	case B43_LED_ACTIVITY:
	148	case B43_LED_TRANSFER:
	149	case B43_LED_APTRANSFER:
	150	snprintf(name, sizeof(name),
6c152bee	151	"b43-%s::tx", wiphy_name(hw->wiphy));
21954c36 MB	152	b43_register_led(dev, &dev->led_tx, name,
	153	ieee80211_get_tx_led_name(hw),
	154	led_index, activelow);
	155	snprintf(name, sizeof(name),
6c152bee	156	"b43-%s::rx", wiphy_name(hw->wiphy));
21954c36 MB	157	b43_register_led(dev, &dev->led_rx, name,
	158	ieee80211_get_rx_led_name(hw),
	159	led_index, activelow);
e4d6b795	160	break;
21954c36 MB	161	case B43_LED_RADIO_ALL:
	162	case B43_LED_RADIO_A:
	163	case B43_LED_RADIO_B:
	164	case B43_LED_MODE_BG:
8e9f7529	165	snprintf(name, sizeof(name),
6c152bee	166	"b43-%s::radio", wiphy_name(hw->wiphy));
8e9f7529	167	b43_register_led(dev, &dev->led_radio, name,
f41f3f37	168	ieee80211_get_radio_led_name(hw),
8e9f7529	169	led_index, activelow);
f41f3f37 JB	170	/* Sync the RF-kill LED state with radio and switch states. */
f41f3f37 JB	171	if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev))
1a8d1227	172	b43_led_turn_on(dev, led_index, activelow);
8e9f7529	173	break;
21954c36 MB	174	case B43_LED_WEIRD:
	175	case B43_LED_ASSOC:
	176	snprintf(name, sizeof(name),
6c152bee	177	"b43-%s::assoc", wiphy_name(hw->wiphy));
21954c36 MB	178	b43_register_led(dev, &dev->led_assoc, name,
	179	ieee80211_get_assoc_led_name(hw),
	180	led_index, activelow);
e4d6b795 MB	181	break;
e4d6b795 MB	182	default:
21954c36 MB	183	b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
	184	behaviour);
	185	break;
e4d6b795 MB	186	}
	187	}
	188
21954c36	189	void b43_leds_init(struct b43_wldev *dev)
e4d6b795	190	{
21954c36	191	struct ssb_bus *bus = dev->dev->bus;
e4d6b795 MB	192	u8 sprom[4];
e4d6b795 MB	193	int i;
21954c36 MB	194	enum b43_led_behaviour behaviour;
21954c36 MB	195	bool activelow;
e4d6b795	196
95de2841 LF	197	sprom[0] = bus->sprom.gpio0;
	198	sprom[1] = bus->sprom.gpio1;
	199	sprom[2] = bus->sprom.gpio2;
	200	sprom[3] = bus->sprom.gpio3;
e4d6b795	201
21954c36	202	for (i = 0; i < 4; i++) {
e4d6b795	203	if (sprom[i] == 0xFF) {
21954c36 MB	204	/* There is no LED information in the SPROM
	205	* for this LED. Hardcode it here. */
	206	activelow = 0;
	207	switch (i) {
	208	case 0:
	209	behaviour = B43_LED_ACTIVITY;
	210	activelow = 1;
	211	if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
	212	behaviour = B43_LED_RADIO_ALL;
	213	break;
	214	case 1:
	215	behaviour = B43_LED_RADIO_B;
	216	if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
	217	behaviour = B43_LED_ASSOC;
	218	break;
	219	case 2:
	220	behaviour = B43_LED_RADIO_A;
	221	break;
	222	case 3:
	223	behaviour = B43_LED_OFF;
	224	break;
	225	default:
	226	B43_WARN_ON(1);
	227	return;
	228	}
e4d6b795	229	} else {
21954c36 MB	230	behaviour = sprom[i] & B43_LED_BEHAVIOUR;
21954c36 MB	231	activelow = !!(sprom[i] & B43_LED_ACTIVELOW);
e4d6b795	232	}
21954c36	233	b43_map_led(dev, i, behaviour, activelow);
e4d6b795	234	}
e4d6b795 MB	235	}
	236
	237	void b43_leds_exit(struct b43_wldev *dev)
	238	{
21954c36 MB	239	b43_unregister_led(&dev->led_tx);
	240	b43_unregister_led(&dev->led_rx);
	241	b43_unregister_led(&dev->led_assoc);
1a8d1227	242	b43_unregister_led(&dev->led_radio);
e4d6b795	243	}