231 lines
6.2 KiB
C
231 lines
6.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Broadcom B43 wireless driver
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LED control
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Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
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Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it>
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Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
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Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
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Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
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*/
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#include "b43legacy.h"
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#include "leds.h"
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#include "rfkill.h"
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static void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
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bool activelow)
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{
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struct b43legacy_wl *wl = dev->wl;
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unsigned long flags;
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u16 ctl;
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spin_lock_irqsave(&wl->leds_lock, flags);
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ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
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if (activelow)
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ctl &= ~(1 << led_index);
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else
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ctl |= (1 << led_index);
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b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
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spin_unlock_irqrestore(&wl->leds_lock, flags);
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}
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static void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
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bool activelow)
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{
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struct b43legacy_wl *wl = dev->wl;
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unsigned long flags;
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u16 ctl;
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spin_lock_irqsave(&wl->leds_lock, flags);
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ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
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if (activelow)
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ctl |= (1 << led_index);
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else
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ctl &= ~(1 << led_index);
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b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
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spin_unlock_irqrestore(&wl->leds_lock, flags);
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}
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/* Callback from the LED subsystem. */
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static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
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enum led_brightness brightness)
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{
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struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
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led_dev);
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struct b43legacy_wldev *dev = led->dev;
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bool radio_enabled;
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/* Checking the radio-enabled status here is slightly racy,
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* but we want to avoid the locking overhead and we don't care
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* whether the LED has the wrong state for a second. */
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radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
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if (brightness == LED_OFF || !radio_enabled)
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b43legacy_led_turn_off(dev, led->index, led->activelow);
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else
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b43legacy_led_turn_on(dev, led->index, led->activelow);
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}
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static int b43legacy_register_led(struct b43legacy_wldev *dev,
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struct b43legacy_led *led,
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const char *name,
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const char *default_trigger,
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u8 led_index, bool activelow)
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{
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int err;
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b43legacy_led_turn_off(dev, led_index, activelow);
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if (led->dev)
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return -EEXIST;
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if (!default_trigger)
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return -EINVAL;
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led->dev = dev;
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led->index = led_index;
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led->activelow = activelow;
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strscpy(led->name, name, sizeof(led->name));
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led->led_dev.name = led->name;
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led->led_dev.default_trigger = default_trigger;
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led->led_dev.brightness_set = b43legacy_led_brightness_set;
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err = led_classdev_register(dev->dev->dev, &led->led_dev);
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if (err) {
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b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
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led->dev = NULL;
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return err;
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}
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return 0;
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}
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static void b43legacy_unregister_led(struct b43legacy_led *led)
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{
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if (!led->dev)
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return;
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led_classdev_unregister(&led->led_dev);
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b43legacy_led_turn_off(led->dev, led->index, led->activelow);
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led->dev = NULL;
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}
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static void b43legacy_map_led(struct b43legacy_wldev *dev,
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u8 led_index,
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enum b43legacy_led_behaviour behaviour,
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bool activelow)
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{
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struct ieee80211_hw *hw = dev->wl->hw;
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char name[B43legacy_LED_MAX_NAME_LEN + 1];
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/* Map the b43 specific LED behaviour value to the
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* generic LED triggers. */
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switch (behaviour) {
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case B43legacy_LED_INACTIVE:
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break;
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case B43legacy_LED_OFF:
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b43legacy_led_turn_off(dev, led_index, activelow);
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break;
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case B43legacy_LED_ON:
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b43legacy_led_turn_on(dev, led_index, activelow);
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break;
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case B43legacy_LED_ACTIVITY:
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case B43legacy_LED_TRANSFER:
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case B43legacy_LED_APTRANSFER:
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snprintf(name, sizeof(name),
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"b43legacy-%s::tx", wiphy_name(hw->wiphy));
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b43legacy_register_led(dev, &dev->led_tx, name,
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ieee80211_get_tx_led_name(hw),
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led_index, activelow);
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snprintf(name, sizeof(name),
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"b43legacy-%s::rx", wiphy_name(hw->wiphy));
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b43legacy_register_led(dev, &dev->led_rx, name,
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ieee80211_get_rx_led_name(hw),
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led_index, activelow);
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break;
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case B43legacy_LED_RADIO_ALL:
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case B43legacy_LED_RADIO_A:
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case B43legacy_LED_RADIO_B:
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case B43legacy_LED_MODE_BG:
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snprintf(name, sizeof(name),
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"b43legacy-%s::radio", wiphy_name(hw->wiphy));
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b43legacy_register_led(dev, &dev->led_radio, name,
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ieee80211_get_radio_led_name(hw),
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led_index, activelow);
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/* Sync the RF-kill LED state with radio and switch states. */
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if (dev->phy.radio_on && b43legacy_is_hw_radio_enabled(dev))
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b43legacy_led_turn_on(dev, led_index, activelow);
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break;
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case B43legacy_LED_WEIRD:
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case B43legacy_LED_ASSOC:
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snprintf(name, sizeof(name),
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"b43legacy-%s::assoc", wiphy_name(hw->wiphy));
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b43legacy_register_led(dev, &dev->led_assoc, name,
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ieee80211_get_assoc_led_name(hw),
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led_index, activelow);
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break;
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default:
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b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
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behaviour);
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break;
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}
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}
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void b43legacy_leds_init(struct b43legacy_wldev *dev)
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{
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struct ssb_bus *bus = dev->dev->bus;
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u8 sprom[4];
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int i;
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enum b43legacy_led_behaviour behaviour;
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bool activelow;
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sprom[0] = bus->sprom.gpio0;
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sprom[1] = bus->sprom.gpio1;
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sprom[2] = bus->sprom.gpio2;
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sprom[3] = bus->sprom.gpio3;
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for (i = 0; i < 4; i++) {
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if (sprom[i] == 0xFF) {
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/* There is no LED information in the SPROM
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* for this LED. Hardcode it here. */
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activelow = false;
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switch (i) {
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case 0:
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behaviour = B43legacy_LED_ACTIVITY;
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activelow = true;
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if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
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behaviour = B43legacy_LED_RADIO_ALL;
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break;
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case 1:
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behaviour = B43legacy_LED_RADIO_B;
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if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
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behaviour = B43legacy_LED_ASSOC;
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break;
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case 2:
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behaviour = B43legacy_LED_RADIO_A;
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break;
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case 3:
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behaviour = B43legacy_LED_OFF;
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break;
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default:
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B43legacy_WARN_ON(1);
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return;
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}
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} else {
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behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
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activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
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}
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b43legacy_map_led(dev, i, behaviour, activelow);
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}
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}
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void b43legacy_leds_exit(struct b43legacy_wldev *dev)
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{
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b43legacy_unregister_led(&dev->led_tx);
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b43legacy_unregister_led(&dev->led_rx);
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b43legacy_unregister_led(&dev->led_assoc);
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b43legacy_unregister_led(&dev->led_radio);
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}
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