1 /* 2 * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <net/bluetooth/bluetooth.h> 10 #include <net/bluetooth/hci_core.h> 11 12 #include "leds.h" 13 14 struct hci_basic_led_trigger { 15 struct led_trigger led_trigger; 16 struct hci_dev *hdev; 17 }; 18 19 #define to_hci_basic_led_trigger(arg) container_of(arg, \ 20 struct hci_basic_led_trigger, led_trigger) 21 22 void hci_leds_update_powered(struct hci_dev *hdev, bool enabled) 23 { 24 if (hdev->power_led) 25 led_trigger_event(hdev->power_led, 26 enabled ? LED_FULL : LED_OFF); 27 } 28 29 static void power_activate(struct led_classdev *led_cdev) 30 { 31 struct hci_basic_led_trigger *htrig; 32 bool powered; 33 34 htrig = to_hci_basic_led_trigger(led_cdev->trigger); 35 powered = test_bit(HCI_UP, &htrig->hdev->flags); 36 37 led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF); 38 } 39 40 static struct led_trigger *led_allocate_basic(struct hci_dev *hdev, 41 void (*activate)(struct led_classdev *led_cdev), 42 const char *name) 43 { 44 struct hci_basic_led_trigger *htrig; 45 46 htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL); 47 if (!htrig) 48 return NULL; 49 50 htrig->hdev = hdev; 51 htrig->led_trigger.activate = activate; 52 htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 53 "%s-%s", hdev->name, 54 name); 55 if (!htrig->led_trigger.name) 56 goto err_alloc; 57 58 if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger)) 59 goto err_register; 60 61 return &htrig->led_trigger; 62 63 err_register: 64 devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name); 65 err_alloc: 66 devm_kfree(&hdev->dev, htrig); 67 return NULL; 68 } 69 70 void hci_leds_init(struct hci_dev *hdev) 71 { 72 /* initialize power_led */ 73 hdev->power_led = led_allocate_basic(hdev, power_activate, "power"); 74 } 75