/* * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> #include "leds.h" DEFINE_LED_TRIGGER(bt_power_led_trigger); struct hci_basic_led_trigger { struct led_trigger led_trigger; struct hci_dev *hdev; }; #define to_hci_basic_led_trigger(arg) container_of(arg, \ struct hci_basic_led_trigger, led_trigger) void hci_leds_update_powered(struct hci_dev *hdev, bool enabled) { if (hdev->power_led) led_trigger_event(hdev->power_led, enabled ? LED_FULL : LED_OFF); if (!enabled) { struct hci_dev *d; read_lock(&hci_dev_list_lock); list_for_each_entry(d, &hci_dev_list, list) { if (test_bit(HCI_UP, &d->flags)) enabled = true; } read_unlock(&hci_dev_list_lock); } led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF); } static void power_activate(struct led_classdev *led_cdev) { struct hci_basic_led_trigger *htrig; bool powered; htrig = to_hci_basic_led_trigger(led_cdev->trigger); powered = test_bit(HCI_UP, &htrig->hdev->flags); led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF); } static struct led_trigger *led_allocate_basic(struct hci_dev *hdev, void (*activate)(struct led_classdev *led_cdev), const char *name) { struct hci_basic_led_trigger *htrig; htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL); if (!htrig) return NULL; htrig->hdev = hdev; htrig->led_trigger.activate = activate; htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s-%s", hdev->name, name); if (!htrig->led_trigger.name) goto err_alloc; if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger)) goto err_register; return &htrig->led_trigger; err_register: devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name); err_alloc: devm_kfree(&hdev->dev, htrig); return NULL; } void hci_leds_init(struct hci_dev *hdev) { /* initialize power_led */ hdev->power_led = led_allocate_basic(hdev, power_activate, "power"); } void bt_leds_init(void) { led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger); } void bt_leds_cleanup(void) { led_trigger_unregister_simple(bt_power_led_trigger); }