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path: root/drivers/net/wireless/broadcom/b43legacy/leds.c
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Diffstat (limited to 'drivers/net/wireless/broadcom/b43legacy/leds.c')
-rw-r--r--drivers/net/wireless/broadcom/b43legacy/leds.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/b43legacy/leds.c b/drivers/net/wireless/broadcom/b43legacy/leds.c
new file mode 100644
index 000000000..79e6fd205
--- /dev/null
+++ b/drivers/net/wireless/broadcom/b43legacy/leds.c
@@ -0,0 +1,230 @@
+// 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 18:19:16 +0000