cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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leds.c (2274B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
      4 */
      5
      6#include <net/bluetooth/bluetooth.h>
      7#include <net/bluetooth/hci_core.h>
      8
      9#include "leds.h"
     10
     11DEFINE_LED_TRIGGER(bt_power_led_trigger);
     12
     13struct hci_basic_led_trigger {
     14	struct led_trigger	led_trigger;
     15	struct hci_dev		*hdev;
     16};
     17
     18#define to_hci_basic_led_trigger(arg) container_of(arg, \
     19			struct hci_basic_led_trigger, led_trigger)
     20
     21void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
     22{
     23	if (hdev->power_led)
     24		led_trigger_event(hdev->power_led,
     25				  enabled ? LED_FULL : LED_OFF);
     26
     27	if (!enabled) {
     28		struct hci_dev *d;
     29
     30		read_lock(&hci_dev_list_lock);
     31
     32		list_for_each_entry(d, &hci_dev_list, list) {
     33			if (test_bit(HCI_UP, &d->flags))
     34				enabled = true;
     35		}
     36
     37		read_unlock(&hci_dev_list_lock);
     38	}
     39
     40	led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF);
     41}
     42
     43static int power_activate(struct led_classdev *led_cdev)
     44{
     45	struct hci_basic_led_trigger *htrig;
     46	bool powered;
     47
     48	htrig = to_hci_basic_led_trigger(led_cdev->trigger);
     49	powered = test_bit(HCI_UP, &htrig->hdev->flags);
     50
     51	led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF);
     52
     53	return 0;
     54}
     55
     56static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
     57			int (*activate)(struct led_classdev *led_cdev),
     58			const char *name)
     59{
     60	struct hci_basic_led_trigger *htrig;
     61
     62	htrig =	devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
     63	if (!htrig)
     64		return NULL;
     65
     66	htrig->hdev = hdev;
     67	htrig->led_trigger.activate = activate;
     68	htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
     69						 "%s-%s", hdev->name,
     70						 name);
     71	if (!htrig->led_trigger.name)
     72		goto err_alloc;
     73
     74	if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
     75		goto err_register;
     76
     77	return &htrig->led_trigger;
     78
     79err_register:
     80	devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
     81err_alloc:
     82	devm_kfree(&hdev->dev, htrig);
     83	return NULL;
     84}
     85
     86void hci_leds_init(struct hci_dev *hdev)
     87{
     88	/* initialize power_led */
     89	hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
     90}
     91
     92void bt_leds_init(void)
     93{
     94	led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger);
     95}
     96
     97void bt_leds_cleanup(void)
     98{
     99	led_trigger_unregister_simple(bt_power_led_trigger);
    100}