[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / b43legacy / 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 "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,
				  const 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);
}
Commit	Line	Data
75388acd LF	1	/*
75388acd LF	2
ba48f7bb LF	3	Broadcom B43 wireless driver
ba48f7bb LF	4	LED control
75388acd LF	5
75388acd LF	6	Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
1f21ad2a	7	Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it>
ba48f7bb LF	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>
75388acd LF	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
75388acd	29	#include "b43legacy.h"
ba48f7bb	30	#include "leds.h"
75388acd	31
75388acd	32
ba48f7bb LF	33	static void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
ba48f7bb LF	34	bool activelow)
75388acd	35	{
ba48f7bb	36	struct b43legacy_wl *wl = dev->wl;
75388acd	37	unsigned long flags;
ba48f7bb	38	u16 ctl;
75388acd	39
ba48f7bb LF	40	spin_lock_irqsave(&wl->leds_lock, flags);
	41	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	42	if (activelow)
	43	ctl &= ~(1 << led_index);
	44	else
	45	ctl \|= (1 << led_index);
	46	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
	47	spin_unlock_irqrestore(&wl->leds_lock, flags);
75388acd LF	48	}
75388acd LF	49
ba48f7bb LF	50	static void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
ba48f7bb LF	51	bool activelow)
75388acd	52	{
ba48f7bb LF	53	struct b43legacy_wl *wl = dev->wl;
	54	unsigned long flags;
	55	u16 ctl;
	56
	57	spin_lock_irqsave(&wl->leds_lock, flags);
	58	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
	59	if (activelow)
	60	ctl \|= (1 << led_index);
	61	else
	62	ctl &= ~(1 << led_index);
	63	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
	64	spin_unlock_irqrestore(&wl->leds_lock, flags);
75388acd LF	65	}
75388acd LF	66
ba48f7bb LF	67	/* Callback from the LED subsystem. */
	68	static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
	69	enum led_brightness brightness)
75388acd	70	{
ba48f7bb LF	71	struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
ba48f7bb LF	72	led_dev);
75388acd	73	struct b43legacy_wldev *dev = led->dev;
ba48f7bb	74	bool radio_enabled;
75388acd	75
ba48f7bb LF	76	/* Checking the radio-enabled status here is slightly racy,
	77	* but we want to avoid the locking overhead and we don't care
	78	* whether the LED has the wrong state for a second. */
	79	radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
75388acd	80
ba48f7bb LF	81	if (brightness == LED_OFF \|\| !radio_enabled)
ba48f7bb LF	82	b43legacy_led_turn_off(dev, led->index, led->activelow);
75388acd	83	else
ba48f7bb	84	b43legacy_led_turn_on(dev, led->index, led->activelow);
75388acd LF	85	}
75388acd LF	86
ba48f7bb LF	87	static int b43legacy_register_led(struct b43legacy_wldev *dev,
ba48f7bb LF	88	struct b43legacy_led *led,
19d337df JB	89	const char *name,
19d337df JB	90	const char *default_trigger,
ba48f7bb	91	u8 led_index, bool activelow)
75388acd	92	{
ba48f7bb LF	93	int err;
	94
	95	b43legacy_led_turn_off(dev, led_index, activelow);
	96	if (led->dev)
	97	return -EEXIST;
	98	if (!default_trigger)
	99	return -EINVAL;
	100	led->dev = dev;
	101	led->index = led_index;
	102	led->activelow = activelow;
	103	strncpy(led->name, name, sizeof(led->name));
	104
	105	led->led_dev.name = led->name;
	106	led->led_dev.default_trigger = default_trigger;
	107	led->led_dev.brightness_set = b43legacy_led_brightness_set;
	108
	109	err = led_classdev_register(dev->dev->dev, &led->led_dev);
	110	if (err) {
	111	b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
	112	led->dev = NULL;
	113	return err;
	114	}
	115	return 0;
	116	}
75388acd	117
ba48f7bb LF	118	static void b43legacy_unregister_led(struct b43legacy_led *led)
	119	{
	120	if (!led->dev)
	121	return;
	122	led_classdev_unregister(&led->led_dev);
	123	b43legacy_led_turn_off(led->dev, led->index, led->activelow);
	124	led->dev = NULL;
	125	}
	126
	127	static void b43legacy_map_led(struct b43legacy_wldev *dev,
	128	u8 led_index,
	129	enum b43legacy_led_behaviour behaviour,
	130	bool activelow)
	131	{
	132	struct ieee80211_hw *hw = dev->wl->hw;
	133	char name[B43legacy_LED_MAX_NAME_LEN + 1];
75388acd	134
ba48f7bb LF	135	/* Map the b43 specific LED behaviour value to the
	136	* generic LED triggers. */
	137	switch (behaviour) {
	138	case B43legacy_LED_INACTIVE:
75388acd	139	break;
ba48f7bb LF	140	case B43legacy_LED_OFF:
ba48f7bb LF	141	b43legacy_led_turn_off(dev, led_index, activelow);
75388acd	142	break;
ba48f7bb LF	143	case B43legacy_LED_ON:
ba48f7bb LF	144	b43legacy_led_turn_on(dev, led_index, activelow);
75388acd	145	break;
ba48f7bb LF	146	case B43legacy_LED_ACTIVITY:
	147	case B43legacy_LED_TRANSFER:
	148	case B43legacy_LED_APTRANSFER:
	149	snprintf(name, sizeof(name),
b157b5e6	150	"b43legacy-%s::tx", wiphy_name(hw->wiphy));
ba48f7bb LF	151	b43legacy_register_led(dev, &dev->led_tx, name,
	152	ieee80211_get_tx_led_name(hw),
	153	led_index, activelow);
	154	snprintf(name, sizeof(name),
b157b5e6	155	"b43legacy-%s::rx", wiphy_name(hw->wiphy));
ba48f7bb LF	156	b43legacy_register_led(dev, &dev->led_rx, name,
	157	ieee80211_get_rx_led_name(hw),
	158	led_index, activelow);
	159	break;
ba48f7bb LF	160	case B43legacy_LED_RADIO_ALL:
	161	case B43legacy_LED_RADIO_A:
	162	case B43legacy_LED_RADIO_B:
	163	case B43legacy_LED_MODE_BG:
93bb7f3a	164	snprintf(name, sizeof(name),
b157b5e6	165	"b43legacy-%s::radio", wiphy_name(hw->wiphy));
93bb7f3a LF	166	b43legacy_register_led(dev, &dev->led_radio, name,
	167	b43legacy_rfkill_led_name(dev),
	168	led_index, activelow);
4ad36d78 LF	169	/* Sync the RF-kill LED state with the switch state. */
	170	if (dev->radio_hw_enable)
	171	b43legacy_led_turn_on(dev, led_index, activelow);
93bb7f3a	172	break;
ba48f7bb LF	173	case B43legacy_LED_WEIRD:
	174	case B43legacy_LED_ASSOC:
	175	snprintf(name, sizeof(name),
b157b5e6	176	"b43legacy-%s::assoc", wiphy_name(hw->wiphy));
ba48f7bb LF	177	b43legacy_register_led(dev, &dev->led_assoc, name,
	178	ieee80211_get_assoc_led_name(hw),
	179	led_index, activelow);
75388acd LF	180	break;
75388acd LF	181	default:
ba48f7bb LF	182	b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
	183	behaviour);
	184	break;
75388acd LF	185	}
	186	}
	187
ba48f7bb	188	void b43legacy_leds_init(struct b43legacy_wldev *dev)
75388acd	189	{
ba48f7bb	190	struct ssb_bus *bus = dev->dev->bus;
75388acd LF	191	u8 sprom[4];
75388acd LF	192	int i;
ba48f7bb LF	193	enum b43legacy_led_behaviour behaviour;
	194	bool activelow;
	195
7797aa38 LF	196	sprom[0] = bus->sprom.gpio0;
	197	sprom[1] = bus->sprom.gpio1;
	198	sprom[2] = bus->sprom.gpio2;
	199	sprom[3] = bus->sprom.gpio3;
ba48f7bb LF	200
	201	for (i = 0; i < 4; i++) {
	202	if (sprom[i] == 0xFF) {
	203	/* There is no LED information in the SPROM
	204	* for this LED. Hardcode it here. */
	205	activelow = 0;
	206	switch (i) {
	207	case 0:
	208	behaviour = B43legacy_LED_ACTIVITY;
	209	activelow = 1;
	210	if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
	211	behaviour = B43legacy_LED_RADIO_ALL;
	212	break;
	213	case 1:
	214	behaviour = B43legacy_LED_RADIO_B;
	215	if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
	216	behaviour = B43legacy_LED_ASSOC;
	217	break;
	218	case 2:
	219	behaviour = B43legacy_LED_RADIO_A;
	220	break;
	221	case 3:
	222	behaviour = B43legacy_LED_OFF;
	223	break;
	224	default:
	225	B43legacy_WARN_ON(1);
	226	return;
	227	}
	228	} else {
	229	behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
	230	activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
75388acd	231	}
ba48f7bb	232	b43legacy_map_led(dev, i, behaviour, activelow);
75388acd	233	}
75388acd LF	234	}
	235
	236	void b43legacy_leds_exit(struct b43legacy_wldev *dev)
	237	{
ba48f7bb LF	238	b43legacy_unregister_led(&dev->led_tx);
	239	b43legacy_unregister_led(&dev->led_rx);
	240	b43legacy_unregister_led(&dev->led_assoc);
4ad36d78	241	b43legacy_unregister_led(&dev->led_radio);
75388acd	242	}