162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later
262306a36Sopenharmony_ci/*
362306a36Sopenharmony_ci
462306a36Sopenharmony_ci  Broadcom B43 wireless driver
562306a36Sopenharmony_ci  LED control
662306a36Sopenharmony_ci
762306a36Sopenharmony_ci  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
862306a36Sopenharmony_ci  Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it>
962306a36Sopenharmony_ci  Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
1062306a36Sopenharmony_ci  Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
1162306a36Sopenharmony_ci  Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
1262306a36Sopenharmony_ci
1362306a36Sopenharmony_ci
1462306a36Sopenharmony_ci*/
1562306a36Sopenharmony_ci
1662306a36Sopenharmony_ci#include "b43legacy.h"
1762306a36Sopenharmony_ci#include "leds.h"
1862306a36Sopenharmony_ci#include "rfkill.h"
1962306a36Sopenharmony_ci
2062306a36Sopenharmony_ci
2162306a36Sopenharmony_cistatic void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
2262306a36Sopenharmony_ci			    bool activelow)
2362306a36Sopenharmony_ci{
2462306a36Sopenharmony_ci	struct b43legacy_wl *wl = dev->wl;
2562306a36Sopenharmony_ci	unsigned long flags;
2662306a36Sopenharmony_ci	u16 ctl;
2762306a36Sopenharmony_ci
2862306a36Sopenharmony_ci	spin_lock_irqsave(&wl->leds_lock, flags);
2962306a36Sopenharmony_ci	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
3062306a36Sopenharmony_ci	if (activelow)
3162306a36Sopenharmony_ci		ctl &= ~(1 << led_index);
3262306a36Sopenharmony_ci	else
3362306a36Sopenharmony_ci		ctl |= (1 << led_index);
3462306a36Sopenharmony_ci	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
3562306a36Sopenharmony_ci	spin_unlock_irqrestore(&wl->leds_lock, flags);
3662306a36Sopenharmony_ci}
3762306a36Sopenharmony_ci
3862306a36Sopenharmony_cistatic void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
3962306a36Sopenharmony_ci			     bool activelow)
4062306a36Sopenharmony_ci{
4162306a36Sopenharmony_ci	struct b43legacy_wl *wl = dev->wl;
4262306a36Sopenharmony_ci	unsigned long flags;
4362306a36Sopenharmony_ci	u16 ctl;
4462306a36Sopenharmony_ci
4562306a36Sopenharmony_ci	spin_lock_irqsave(&wl->leds_lock, flags);
4662306a36Sopenharmony_ci	ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
4762306a36Sopenharmony_ci	if (activelow)
4862306a36Sopenharmony_ci		ctl |= (1 << led_index);
4962306a36Sopenharmony_ci	else
5062306a36Sopenharmony_ci		ctl &= ~(1 << led_index);
5162306a36Sopenharmony_ci	b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
5262306a36Sopenharmony_ci	spin_unlock_irqrestore(&wl->leds_lock, flags);
5362306a36Sopenharmony_ci}
5462306a36Sopenharmony_ci
5562306a36Sopenharmony_ci/* Callback from the LED subsystem. */
5662306a36Sopenharmony_cistatic void b43legacy_led_brightness_set(struct led_classdev *led_dev,
5762306a36Sopenharmony_ci				   enum led_brightness brightness)
5862306a36Sopenharmony_ci{
5962306a36Sopenharmony_ci	struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
6062306a36Sopenharmony_ci				    led_dev);
6162306a36Sopenharmony_ci	struct b43legacy_wldev *dev = led->dev;
6262306a36Sopenharmony_ci	bool radio_enabled;
6362306a36Sopenharmony_ci
6462306a36Sopenharmony_ci	/* Checking the radio-enabled status here is slightly racy,
6562306a36Sopenharmony_ci	 * but we want to avoid the locking overhead and we don't care
6662306a36Sopenharmony_ci	 * whether the LED has the wrong state for a second. */
6762306a36Sopenharmony_ci	radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
6862306a36Sopenharmony_ci
6962306a36Sopenharmony_ci	if (brightness == LED_OFF || !radio_enabled)
7062306a36Sopenharmony_ci		b43legacy_led_turn_off(dev, led->index, led->activelow);
7162306a36Sopenharmony_ci	else
7262306a36Sopenharmony_ci		b43legacy_led_turn_on(dev, led->index, led->activelow);
7362306a36Sopenharmony_ci}
7462306a36Sopenharmony_ci
7562306a36Sopenharmony_cistatic int b43legacy_register_led(struct b43legacy_wldev *dev,
7662306a36Sopenharmony_ci				  struct b43legacy_led *led,
7762306a36Sopenharmony_ci				  const char *name,
7862306a36Sopenharmony_ci				  const char *default_trigger,
7962306a36Sopenharmony_ci				  u8 led_index, bool activelow)
8062306a36Sopenharmony_ci{
8162306a36Sopenharmony_ci	int err;
8262306a36Sopenharmony_ci
8362306a36Sopenharmony_ci	b43legacy_led_turn_off(dev, led_index, activelow);
8462306a36Sopenharmony_ci	if (led->dev)
8562306a36Sopenharmony_ci		return -EEXIST;
8662306a36Sopenharmony_ci	if (!default_trigger)
8762306a36Sopenharmony_ci		return -EINVAL;
8862306a36Sopenharmony_ci	led->dev = dev;
8962306a36Sopenharmony_ci	led->index = led_index;
9062306a36Sopenharmony_ci	led->activelow = activelow;
9162306a36Sopenharmony_ci	strscpy(led->name, name, sizeof(led->name));
9262306a36Sopenharmony_ci
9362306a36Sopenharmony_ci	led->led_dev.name = led->name;
9462306a36Sopenharmony_ci	led->led_dev.default_trigger = default_trigger;
9562306a36Sopenharmony_ci	led->led_dev.brightness_set = b43legacy_led_brightness_set;
9662306a36Sopenharmony_ci
9762306a36Sopenharmony_ci	err = led_classdev_register(dev->dev->dev, &led->led_dev);
9862306a36Sopenharmony_ci	if (err) {
9962306a36Sopenharmony_ci		b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
10062306a36Sopenharmony_ci		led->dev = NULL;
10162306a36Sopenharmony_ci		return err;
10262306a36Sopenharmony_ci	}
10362306a36Sopenharmony_ci	return 0;
10462306a36Sopenharmony_ci}
10562306a36Sopenharmony_ci
10662306a36Sopenharmony_cistatic void b43legacy_unregister_led(struct b43legacy_led *led)
10762306a36Sopenharmony_ci{
10862306a36Sopenharmony_ci	if (!led->dev)
10962306a36Sopenharmony_ci		return;
11062306a36Sopenharmony_ci	led_classdev_unregister(&led->led_dev);
11162306a36Sopenharmony_ci	b43legacy_led_turn_off(led->dev, led->index, led->activelow);
11262306a36Sopenharmony_ci	led->dev = NULL;
11362306a36Sopenharmony_ci}
11462306a36Sopenharmony_ci
11562306a36Sopenharmony_cistatic void b43legacy_map_led(struct b43legacy_wldev *dev,
11662306a36Sopenharmony_ci			u8 led_index,
11762306a36Sopenharmony_ci			enum b43legacy_led_behaviour behaviour,
11862306a36Sopenharmony_ci			bool activelow)
11962306a36Sopenharmony_ci{
12062306a36Sopenharmony_ci	struct ieee80211_hw *hw = dev->wl->hw;
12162306a36Sopenharmony_ci	char name[B43legacy_LED_MAX_NAME_LEN + 1];
12262306a36Sopenharmony_ci
12362306a36Sopenharmony_ci	/* Map the b43 specific LED behaviour value to the
12462306a36Sopenharmony_ci	 * generic LED triggers. */
12562306a36Sopenharmony_ci	switch (behaviour) {
12662306a36Sopenharmony_ci	case B43legacy_LED_INACTIVE:
12762306a36Sopenharmony_ci		break;
12862306a36Sopenharmony_ci	case B43legacy_LED_OFF:
12962306a36Sopenharmony_ci		b43legacy_led_turn_off(dev, led_index, activelow);
13062306a36Sopenharmony_ci		break;
13162306a36Sopenharmony_ci	case B43legacy_LED_ON:
13262306a36Sopenharmony_ci		b43legacy_led_turn_on(dev, led_index, activelow);
13362306a36Sopenharmony_ci		break;
13462306a36Sopenharmony_ci	case B43legacy_LED_ACTIVITY:
13562306a36Sopenharmony_ci	case B43legacy_LED_TRANSFER:
13662306a36Sopenharmony_ci	case B43legacy_LED_APTRANSFER:
13762306a36Sopenharmony_ci		snprintf(name, sizeof(name),
13862306a36Sopenharmony_ci			 "b43legacy-%s::tx", wiphy_name(hw->wiphy));
13962306a36Sopenharmony_ci		b43legacy_register_led(dev, &dev->led_tx, name,
14062306a36Sopenharmony_ci				 ieee80211_get_tx_led_name(hw),
14162306a36Sopenharmony_ci				 led_index, activelow);
14262306a36Sopenharmony_ci		snprintf(name, sizeof(name),
14362306a36Sopenharmony_ci			 "b43legacy-%s::rx", wiphy_name(hw->wiphy));
14462306a36Sopenharmony_ci		b43legacy_register_led(dev, &dev->led_rx, name,
14562306a36Sopenharmony_ci				 ieee80211_get_rx_led_name(hw),
14662306a36Sopenharmony_ci				 led_index, activelow);
14762306a36Sopenharmony_ci		break;
14862306a36Sopenharmony_ci	case B43legacy_LED_RADIO_ALL:
14962306a36Sopenharmony_ci	case B43legacy_LED_RADIO_A:
15062306a36Sopenharmony_ci	case B43legacy_LED_RADIO_B:
15162306a36Sopenharmony_ci	case B43legacy_LED_MODE_BG:
15262306a36Sopenharmony_ci		snprintf(name, sizeof(name),
15362306a36Sopenharmony_ci			 "b43legacy-%s::radio", wiphy_name(hw->wiphy));
15462306a36Sopenharmony_ci		b43legacy_register_led(dev, &dev->led_radio, name,
15562306a36Sopenharmony_ci				 ieee80211_get_radio_led_name(hw),
15662306a36Sopenharmony_ci				 led_index, activelow);
15762306a36Sopenharmony_ci		/* Sync the RF-kill LED state with radio and switch states. */
15862306a36Sopenharmony_ci		if (dev->phy.radio_on && b43legacy_is_hw_radio_enabled(dev))
15962306a36Sopenharmony_ci			b43legacy_led_turn_on(dev, led_index, activelow);
16062306a36Sopenharmony_ci		break;
16162306a36Sopenharmony_ci	case B43legacy_LED_WEIRD:
16262306a36Sopenharmony_ci	case B43legacy_LED_ASSOC:
16362306a36Sopenharmony_ci		snprintf(name, sizeof(name),
16462306a36Sopenharmony_ci			 "b43legacy-%s::assoc", wiphy_name(hw->wiphy));
16562306a36Sopenharmony_ci		b43legacy_register_led(dev, &dev->led_assoc, name,
16662306a36Sopenharmony_ci				 ieee80211_get_assoc_led_name(hw),
16762306a36Sopenharmony_ci				 led_index, activelow);
16862306a36Sopenharmony_ci		break;
16962306a36Sopenharmony_ci	default:
17062306a36Sopenharmony_ci		b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
17162306a36Sopenharmony_ci			behaviour);
17262306a36Sopenharmony_ci		break;
17362306a36Sopenharmony_ci	}
17462306a36Sopenharmony_ci}
17562306a36Sopenharmony_ci
17662306a36Sopenharmony_civoid b43legacy_leds_init(struct b43legacy_wldev *dev)
17762306a36Sopenharmony_ci{
17862306a36Sopenharmony_ci	struct ssb_bus *bus = dev->dev->bus;
17962306a36Sopenharmony_ci	u8 sprom[4];
18062306a36Sopenharmony_ci	int i;
18162306a36Sopenharmony_ci	enum b43legacy_led_behaviour behaviour;
18262306a36Sopenharmony_ci	bool activelow;
18362306a36Sopenharmony_ci
18462306a36Sopenharmony_ci	sprom[0] = bus->sprom.gpio0;
18562306a36Sopenharmony_ci	sprom[1] = bus->sprom.gpio1;
18662306a36Sopenharmony_ci	sprom[2] = bus->sprom.gpio2;
18762306a36Sopenharmony_ci	sprom[3] = bus->sprom.gpio3;
18862306a36Sopenharmony_ci
18962306a36Sopenharmony_ci	for (i = 0; i < 4; i++) {
19062306a36Sopenharmony_ci		if (sprom[i] == 0xFF) {
19162306a36Sopenharmony_ci			/* There is no LED information in the SPROM
19262306a36Sopenharmony_ci			 * for this LED. Hardcode it here. */
19362306a36Sopenharmony_ci			activelow = false;
19462306a36Sopenharmony_ci			switch (i) {
19562306a36Sopenharmony_ci			case 0:
19662306a36Sopenharmony_ci				behaviour = B43legacy_LED_ACTIVITY;
19762306a36Sopenharmony_ci				activelow = true;
19862306a36Sopenharmony_ci				if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
19962306a36Sopenharmony_ci					behaviour = B43legacy_LED_RADIO_ALL;
20062306a36Sopenharmony_ci				break;
20162306a36Sopenharmony_ci			case 1:
20262306a36Sopenharmony_ci				behaviour = B43legacy_LED_RADIO_B;
20362306a36Sopenharmony_ci				if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
20462306a36Sopenharmony_ci					behaviour = B43legacy_LED_ASSOC;
20562306a36Sopenharmony_ci				break;
20662306a36Sopenharmony_ci			case 2:
20762306a36Sopenharmony_ci				behaviour = B43legacy_LED_RADIO_A;
20862306a36Sopenharmony_ci				break;
20962306a36Sopenharmony_ci			case 3:
21062306a36Sopenharmony_ci				behaviour = B43legacy_LED_OFF;
21162306a36Sopenharmony_ci				break;
21262306a36Sopenharmony_ci			default:
21362306a36Sopenharmony_ci				B43legacy_WARN_ON(1);
21462306a36Sopenharmony_ci				return;
21562306a36Sopenharmony_ci			}
21662306a36Sopenharmony_ci		} else {
21762306a36Sopenharmony_ci			behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
21862306a36Sopenharmony_ci			activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
21962306a36Sopenharmony_ci		}
22062306a36Sopenharmony_ci		b43legacy_map_led(dev, i, behaviour, activelow);
22162306a36Sopenharmony_ci	}
22262306a36Sopenharmony_ci}
22362306a36Sopenharmony_ci
22462306a36Sopenharmony_civoid b43legacy_leds_exit(struct b43legacy_wldev *dev)
22562306a36Sopenharmony_ci{
22662306a36Sopenharmony_ci	b43legacy_unregister_led(&dev->led_tx);
22762306a36Sopenharmony_ci	b43legacy_unregister_led(&dev->led_rx);
22862306a36Sopenharmony_ci	b43legacy_unregister_led(&dev->led_assoc);
22962306a36Sopenharmony_ci	b43legacy_unregister_led(&dev->led_radio);
23062306a36Sopenharmony_ci}
231