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// SPDX-License-Identifier: GPL-2.0-or-later
/*
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 <m@bues.ch>
Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
*/
#include "b43legacy.h"
#include "leds.h"
#include "rfkill.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;
strscpy(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,
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 && b43legacy_is_hw_radio_enabled(dev))
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 = false;
switch (i) {
case 0:
behaviour = B43legacy_LED_ACTIVITY;
activelow = true;
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);
}
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