351 lines
8.5 KiB
C
351 lines
8.5 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 "b43.h"
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#include "leds.h"
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#include "rfkill.h"
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static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
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bool activelow)
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{
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u16 ctl;
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ctl = b43_read16(dev, B43_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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b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
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}
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static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
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bool activelow)
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{
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u16 ctl;
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ctl = b43_read16(dev, B43_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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b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
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}
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static void b43_led_update(struct b43_wldev *dev,
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struct b43_led *led)
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{
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bool radio_enabled;
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bool turn_on;
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if (!led->wl)
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return;
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radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
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/* The led->state read is racy, but we don't care. In case we raced
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* with the brightness_set handler, we will be called again soon
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* to fixup our state. */
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if (radio_enabled)
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turn_on = atomic_read(&led->state) != LED_OFF;
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else
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turn_on = false;
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if (turn_on == led->hw_state)
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return;
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led->hw_state = turn_on;
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if (turn_on)
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b43_led_turn_on(dev, led->index, led->activelow);
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else
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b43_led_turn_off(dev, led->index, led->activelow);
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}
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static void b43_leds_work(struct work_struct *work)
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{
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struct b43_leds *leds = container_of(work, struct b43_leds, work);
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struct b43_wl *wl = container_of(leds, struct b43_wl, leds);
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struct b43_wldev *dev;
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mutex_lock(&wl->mutex);
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dev = wl->current_dev;
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if (unlikely(!dev || b43_status(dev) < B43_STAT_STARTED))
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goto out_unlock;
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b43_led_update(dev, &wl->leds.led_tx);
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b43_led_update(dev, &wl->leds.led_rx);
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b43_led_update(dev, &wl->leds.led_radio);
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b43_led_update(dev, &wl->leds.led_assoc);
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out_unlock:
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mutex_unlock(&wl->mutex);
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}
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/* Callback from the LED subsystem. */
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static void b43_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 b43_led *led = container_of(led_dev, struct b43_led, led_dev);
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struct b43_wl *wl = led->wl;
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if (likely(!wl->leds.stop)) {
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atomic_set(&led->state, brightness);
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ieee80211_queue_work(wl->hw, &wl->leds.work);
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}
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}
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static int b43_register_led(struct b43_wldev *dev, struct b43_led *led,
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const char *name, 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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if (led->wl)
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return -EEXIST;
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if (!default_trigger)
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return -EINVAL;
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led->wl = dev->wl;
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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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atomic_set(&led->state, 0);
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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 = b43_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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b43warn(dev->wl, "LEDs: Failed to register %s\n", name);
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led->wl = 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 b43_unregister_led(struct b43_led *led)
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{
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if (!led->wl)
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return;
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led_classdev_unregister(&led->led_dev);
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led->wl = NULL;
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}
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static void b43_map_led(struct b43_wldev *dev,
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u8 led_index,
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enum b43_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[B43_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 B43_LED_INACTIVE:
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case B43_LED_OFF:
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case B43_LED_ON:
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break;
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case B43_LED_ACTIVITY:
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case B43_LED_TRANSFER:
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case B43_LED_APTRANSFER:
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snprintf(name, sizeof(name),
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"b43-%s::tx", wiphy_name(hw->wiphy));
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b43_register_led(dev, &dev->wl->leds.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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"b43-%s::rx", wiphy_name(hw->wiphy));
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b43_register_led(dev, &dev->wl->leds.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 B43_LED_RADIO_ALL:
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case B43_LED_RADIO_A:
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case B43_LED_RADIO_B:
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case B43_LED_MODE_BG:
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snprintf(name, sizeof(name),
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"b43-%s::radio", wiphy_name(hw->wiphy));
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b43_register_led(dev, &dev->wl->leds.led_radio, name,
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ieee80211_get_radio_led_name(hw),
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led_index, activelow);
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break;
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case B43_LED_WEIRD:
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case B43_LED_ASSOC:
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snprintf(name, sizeof(name),
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"b43-%s::assoc", wiphy_name(hw->wiphy));
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b43_register_led(dev, &dev->wl->leds.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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b43warn(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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static void b43_led_get_sprominfo(struct b43_wldev *dev,
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unsigned int led_index,
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enum b43_led_behaviour *behaviour,
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bool *activelow)
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{
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u8 sprom[4];
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sprom[0] = dev->dev->bus_sprom->gpio0;
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sprom[1] = dev->dev->bus_sprom->gpio1;
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sprom[2] = dev->dev->bus_sprom->gpio2;
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sprom[3] = dev->dev->bus_sprom->gpio3;
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if ((sprom[0] & sprom[1] & sprom[2] & sprom[3]) == 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 (led_index) {
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case 0:
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*behaviour = B43_LED_ACTIVITY;
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*activelow = true;
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if (dev->dev->board_vendor == PCI_VENDOR_ID_COMPAQ)
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*behaviour = B43_LED_RADIO_ALL;
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break;
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case 1:
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*behaviour = B43_LED_RADIO_B;
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if (dev->dev->board_vendor == PCI_VENDOR_ID_ASUSTEK)
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*behaviour = B43_LED_ASSOC;
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break;
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case 2:
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*behaviour = B43_LED_RADIO_A;
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break;
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case 3:
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*behaviour = B43_LED_OFF;
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break;
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default:
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*behaviour = B43_LED_OFF;
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B43_WARN_ON(1);
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return;
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}
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} else {
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/* keep LED disabled if no mapping is defined */
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if (sprom[led_index] == 0xff)
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*behaviour = B43_LED_OFF;
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else
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*behaviour = sprom[led_index] & B43_LED_BEHAVIOUR;
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*activelow = !!(sprom[led_index] & B43_LED_ACTIVELOW);
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}
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}
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void b43_leds_init(struct b43_wldev *dev)
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{
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struct b43_led *led;
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unsigned int i;
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enum b43_led_behaviour behaviour;
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bool activelow;
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/* Sync the RF-kill LED state (if we have one) with radio and switch states. */
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led = &dev->wl->leds.led_radio;
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if (led->wl) {
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if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev)) {
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b43_led_turn_on(dev, led->index, led->activelow);
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led->hw_state = true;
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atomic_set(&led->state, 1);
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} else {
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b43_led_turn_off(dev, led->index, led->activelow);
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led->hw_state = false;
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atomic_set(&led->state, 0);
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}
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}
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/* Initialize TX/RX/ASSOC leds */
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led = &dev->wl->leds.led_tx;
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if (led->wl) {
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b43_led_turn_off(dev, led->index, led->activelow);
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led->hw_state = false;
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atomic_set(&led->state, 0);
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}
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led = &dev->wl->leds.led_rx;
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if (led->wl) {
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b43_led_turn_off(dev, led->index, led->activelow);
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led->hw_state = false;
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atomic_set(&led->state, 0);
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}
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led = &dev->wl->leds.led_assoc;
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if (led->wl) {
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b43_led_turn_off(dev, led->index, led->activelow);
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led->hw_state = false;
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atomic_set(&led->state, 0);
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}
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/* Initialize other LED states. */
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for (i = 0; i < B43_MAX_NR_LEDS; i++) {
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b43_led_get_sprominfo(dev, i, &behaviour, &activelow);
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switch (behaviour) {
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case B43_LED_OFF:
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b43_led_turn_off(dev, i, activelow);
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break;
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case B43_LED_ON:
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b43_led_turn_on(dev, i, activelow);
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break;
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default:
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/* Leave others as-is. */
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break;
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}
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}
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dev->wl->leds.stop = 0;
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}
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void b43_leds_exit(struct b43_wldev *dev)
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{
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struct b43_leds *leds = &dev->wl->leds;
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b43_led_turn_off(dev, leds->led_tx.index, leds->led_tx.activelow);
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b43_led_turn_off(dev, leds->led_rx.index, leds->led_rx.activelow);
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b43_led_turn_off(dev, leds->led_assoc.index, leds->led_assoc.activelow);
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b43_led_turn_off(dev, leds->led_radio.index, leds->led_radio.activelow);
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}
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void b43_leds_stop(struct b43_wldev *dev)
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{
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struct b43_leds *leds = &dev->wl->leds;
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leds->stop = 1;
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cancel_work_sync(&leds->work);
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}
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void b43_leds_register(struct b43_wldev *dev)
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{
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unsigned int i;
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enum b43_led_behaviour behaviour;
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bool activelow;
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INIT_WORK(&dev->wl->leds.work, b43_leds_work);
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/* Register the LEDs to the LED subsystem. */
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for (i = 0; i < B43_MAX_NR_LEDS; i++) {
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b43_led_get_sprominfo(dev, i, &behaviour, &activelow);
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b43_map_led(dev, i, behaviour, activelow);
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}
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}
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void b43_leds_unregister(struct b43_wl *wl)
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{
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struct b43_leds *leds = &wl->leds;
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b43_unregister_led(&leds->led_tx);
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b43_unregister_led(&leds->led_rx);
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b43_unregister_led(&leds->led_assoc);
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b43_unregister_led(&leds->led_radio);
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}
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