--- /dev/null
+/*
+
+ 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>
+
+ 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 "b43.h"
+#include "leds.h"
+#include "rfkill.h"
+
+
+static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
+ bool activelow)
+{
+ u16 ctl;
+
+ ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
+ if (activelow)
+ ctl &= ~(1 << led_index);
+ else
+ ctl |= (1 << led_index);
+ b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
+}
+
+static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
+ bool activelow)
+{
+ u16 ctl;
+
+ ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
+ if (activelow)
+ ctl |= (1 << led_index);
+ else
+ ctl &= ~(1 << led_index);
+ b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
+}
+
+static void b43_led_update(struct b43_wldev *dev,
+ struct b43_led *led)
+{
+ bool radio_enabled;
+ bool turn_on;
+
+ if (!led->wl)
+ return;
+
+ radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
+
+ /* The led->state read is racy, but we don't care. In case we raced
+ * with the brightness_set handler, we will be called again soon
+ * to fixup our state. */
+ if (radio_enabled)
+ turn_on = atomic_read(&led->state) != LED_OFF;
+ else
+ turn_on = false;
+ if (turn_on == led->hw_state)
+ return;
+ led->hw_state = turn_on;
+
+ if (turn_on)
+ b43_led_turn_on(dev, led->index, led->activelow);
+ else
+ b43_led_turn_off(dev, led->index, led->activelow);
+}
+
+static void b43_leds_work(struct work_struct *work)
+{
+ struct b43_leds *leds = container_of(work, struct b43_leds, work);
+ struct b43_wl *wl = container_of(leds, struct b43_wl, leds);
+ struct b43_wldev *dev;
+
+ mutex_lock(&wl->mutex);
+ dev = wl->current_dev;
+ if (unlikely(!dev || b43_status(dev) < B43_STAT_STARTED))
+ goto out_unlock;
+
+ b43_led_update(dev, &wl->leds.led_tx);
+ b43_led_update(dev, &wl->leds.led_rx);
+ b43_led_update(dev, &wl->leds.led_radio);
+ b43_led_update(dev, &wl->leds.led_assoc);
+
+out_unlock:
+ mutex_unlock(&wl->mutex);
+}
+
+/* Callback from the LED subsystem. */
+static void b43_led_brightness_set(struct led_classdev *led_dev,
+ enum led_brightness brightness)
+{
+ struct b43_led *led = container_of(led_dev, struct b43_led, led_dev);
+ struct b43_wl *wl = led->wl;
+
+ if (likely(!wl->leds.stop)) {
+ atomic_set(&led->state, brightness);
+ ieee80211_queue_work(wl->hw, &wl->leds.work);
+ }
+}
+
+static int b43_register_led(struct b43_wldev *dev, struct b43_led *led,
+ const char *name, const char *default_trigger,
+ u8 led_index, bool activelow)
+{
+ int err;
+
+ if (led->wl)
+ return -EEXIST;
+ if (!default_trigger)
+ return -EINVAL;
+ led->wl = dev->wl;
+ led->index = led_index;
+ led->activelow = activelow;
+ strncpy(led->name, name, sizeof(led->name));
+ atomic_set(&led->state, 0);
+
+ led->led_dev.name = led->name;
+ led->led_dev.default_trigger = default_trigger;
+ led->led_dev.brightness_set = b43_led_brightness_set;
+
+ err = led_classdev_register(dev->dev->dev, &led->led_dev);
+ if (err) {
+ b43warn(dev->wl, "LEDs: Failed to register %s\n", name);
+ led->wl = NULL;
+ return err;
+ }
+
+ return 0;
+}
+
+static void b43_unregister_led(struct b43_led *led)
+{
+ if (!led->wl)
+ return;
+ led_classdev_unregister(&led->led_dev);
+ led->wl = NULL;
+}
+
+static void b43_map_led(struct b43_wldev *dev,
+ u8 led_index,
+ enum b43_led_behaviour behaviour,
+ bool activelow)
+{
+ struct ieee80211_hw *hw = dev->wl->hw;
+ char name[B43_LED_MAX_NAME_LEN + 1];
+
+ /* Map the b43 specific LED behaviour value to the
+ * generic LED triggers. */
+ switch (behaviour) {
+ case B43_LED_INACTIVE:
+ case B43_LED_OFF:
+ case B43_LED_ON:
+ break;
+ case B43_LED_ACTIVITY:
+ case B43_LED_TRANSFER:
+ case B43_LED_APTRANSFER:
+ snprintf(name, sizeof(name),
+ "b43-%s::tx", wiphy_name(hw->wiphy));
+ b43_register_led(dev, &dev->wl->leds.led_tx, name,
+ ieee80211_get_tx_led_name(hw),
+ led_index, activelow);
+ snprintf(name, sizeof(name),
+ "b43-%s::rx", wiphy_name(hw->wiphy));
+ b43_register_led(dev, &dev->wl->leds.led_rx, name,
+ ieee80211_get_rx_led_name(hw),
+ led_index, activelow);
+ break;
+ case B43_LED_RADIO_ALL:
+ case B43_LED_RADIO_A:
+ case B43_LED_RADIO_B:
+ case B43_LED_MODE_BG:
+ snprintf(name, sizeof(name),
+ "b43-%s::radio", wiphy_name(hw->wiphy));
+ b43_register_led(dev, &dev->wl->leds.led_radio, name,
+ ieee80211_get_radio_led_name(hw),
+ led_index, activelow);
+ break;
+ case B43_LED_WEIRD:
+ case B43_LED_ASSOC:
+ snprintf(name, sizeof(name),
+ "b43-%s::assoc", wiphy_name(hw->wiphy));
+ b43_register_led(dev, &dev->wl->leds.led_assoc, name,
+ ieee80211_get_assoc_led_name(hw),
+ led_index, activelow);
+ break;
+ default:
+ b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
+ behaviour);
+ break;
+ }
+}
+
+static void b43_led_get_sprominfo(struct b43_wldev *dev,
+ unsigned int led_index,
+ enum b43_led_behaviour *behaviour,
+ bool *activelow)
+{
+ u8 sprom[4];
+
+ sprom[0] = dev->dev->bus_sprom->gpio0;
+ sprom[1] = dev->dev->bus_sprom->gpio1;
+ sprom[2] = dev->dev->bus_sprom->gpio2;
+ sprom[3] = dev->dev->bus_sprom->gpio3;
+
+ if (sprom[led_index] == 0xFF) {
+ /* There is no LED information in the SPROM
+ * for this LED. Hardcode it here. */
+ *activelow = false;
+ switch (led_index) {
+ case 0:
+ *behaviour = B43_LED_ACTIVITY;
+ *activelow = true;
+ if (dev->dev->board_vendor == PCI_VENDOR_ID_COMPAQ)
+ *behaviour = B43_LED_RADIO_ALL;
+ break;
+ case 1:
+ *behaviour = B43_LED_RADIO_B;
+ if (dev->dev->board_vendor == PCI_VENDOR_ID_ASUSTEK)
+ *behaviour = B43_LED_ASSOC;
+ break;
+ case 2:
+ *behaviour = B43_LED_RADIO_A;
+ break;
+ case 3:
+ *behaviour = B43_LED_OFF;
+ break;
+ default:
+ *behaviour = B43_LED_OFF;
+ B43_WARN_ON(1);
+ return;
+ }
+ } else {
+ *behaviour = sprom[led_index] & B43_LED_BEHAVIOUR;
+ *activelow = !!(sprom[led_index] & B43_LED_ACTIVELOW);
+ }
+}
+
+void b43_leds_init(struct b43_wldev *dev)
+{
+ struct b43_led *led;
+ unsigned int i;
+ enum b43_led_behaviour behaviour;
+ bool activelow;
+
+ /* Sync the RF-kill LED state (if we have one) with radio and switch states. */
+ led = &dev->wl->leds.led_radio;
+ if (led->wl) {
+ if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev)) {
+ b43_led_turn_on(dev, led->index, led->activelow);
+ led->hw_state = true;
+ atomic_set(&led->state, 1);
+ } else {
+ b43_led_turn_off(dev, led->index, led->activelow);
+ led->hw_state = false;
+ atomic_set(&led->state, 0);
+ }
+ }
+
+ /* Initialize TX/RX/ASSOC leds */
+ led = &dev->wl->leds.led_tx;
+ if (led->wl) {
+ b43_led_turn_off(dev, led->index, led->activelow);
+ led->hw_state = false;
+ atomic_set(&led->state, 0);
+ }
+ led = &dev->wl->leds.led_rx;
+ if (led->wl) {
+ b43_led_turn_off(dev, led->index, led->activelow);
+ led->hw_state = false;
+ atomic_set(&led->state, 0);
+ }
+ led = &dev->wl->leds.led_assoc;
+ if (led->wl) {
+ b43_led_turn_off(dev, led->index, led->activelow);
+ led->hw_state = false;
+ atomic_set(&led->state, 0);
+ }
+
+ /* Initialize other LED states. */
+ for (i = 0; i < B43_MAX_NR_LEDS; i++) {
+ b43_led_get_sprominfo(dev, i, &behaviour, &activelow);
+ switch (behaviour) {
+ case B43_LED_OFF:
+ b43_led_turn_off(dev, i, activelow);
+ break;
+ case B43_LED_ON:
+ b43_led_turn_on(dev, i, activelow);
+ break;
+ default:
+ /* Leave others as-is. */
+ break;
+ }
+ }
+
+ dev->wl->leds.stop = 0;
+}
+
+void b43_leds_exit(struct b43_wldev *dev)
+{
+ struct b43_leds *leds = &dev->wl->leds;
+
+ b43_led_turn_off(dev, leds->led_tx.index, leds->led_tx.activelow);
+ b43_led_turn_off(dev, leds->led_rx.index, leds->led_rx.activelow);
+ b43_led_turn_off(dev, leds->led_assoc.index, leds->led_assoc.activelow);
+ b43_led_turn_off(dev, leds->led_radio.index, leds->led_radio.activelow);
+}
+
+void b43_leds_stop(struct b43_wldev *dev)
+{
+ struct b43_leds *leds = &dev->wl->leds;
+
+ leds->stop = 1;
+ cancel_work_sync(&leds->work);
+}
+
+void b43_leds_register(struct b43_wldev *dev)
+{
+ unsigned int i;
+ enum b43_led_behaviour behaviour;
+ bool activelow;
+
+ INIT_WORK(&dev->wl->leds.work, b43_leds_work);
+
+ /* Register the LEDs to the LED subsystem. */
+ for (i = 0; i < B43_MAX_NR_LEDS; i++) {
+ b43_led_get_sprominfo(dev, i, &behaviour, &activelow);
+ b43_map_led(dev, i, behaviour, activelow);
+ }
+}
+
+void b43_leds_unregister(struct b43_wl *wl)
+{
+ struct b43_leds *leds = &wl->leds;
+
+ b43_unregister_led(&leds->led_tx);
+ b43_unregister_led(&leds->led_rx);
+ b43_unregister_led(&leds->led_assoc);
+ b43_unregister_led(&leds->led_radio);
+}
Code Review / kvmfornfv.git / blobdiff