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// SPDX-License-Identifier: GPL-2.0
/* Bluetooth HCI driver model support. */
#include <linux/module.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
static struct class *bt_class;
static void bt_link_release(struct device *dev)
{
struct hci_conn *conn = to_hci_conn(dev);
kfree(conn);
}
static const struct device_type bt_link = {
.name = "link",
.release = bt_link_release,
};
/*
* The rfcomm tty device will possibly retain even when conn
* is down, and sysfs doesn't support move zombie device,
* so we should move the device before conn device is destroyed.
*/
static int __match_tty(struct device *dev, void *data)
{
return !strncmp(dev_name(dev), "rfcomm", 6);
}
void hci_conn_init_sysfs(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
bt_dev_dbg(hdev, "conn %p", conn);
conn->dev.type = &bt_link;
conn->dev.class = bt_class;
conn->dev.parent = &hdev->dev;
device_initialize(&conn->dev);
}
void hci_conn_add_sysfs(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
bt_dev_dbg(hdev, "conn %p", conn);
if (device_is_registered(&conn->dev))
return;
dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
if (device_add(&conn->dev) < 0)
bt_dev_err(hdev, "failed to register connection device");
}
void hci_conn_del_sysfs(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
bt_dev_dbg(hdev, "conn %p", conn);
if (!device_is_registered(&conn->dev)) {
/* If device_add() has *not* succeeded, use *only* put_device()
* to drop the reference count.
*/
put_device(&conn->dev);
return;
}
while (1) {
struct device *dev;
dev = device_find_child(&conn->dev, NULL, __match_tty);
if (!dev)
break;
device_move(dev, NULL, DPM_ORDER_DEV_LAST);
put_device(dev);
}
device_unregister(&conn->dev);
}
static void bt_host_release(struct device *dev)
{
struct hci_dev *hdev = to_hci_dev(dev);
if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
hci_release_dev(hdev);
else
kfree(hdev);
module_put(THIS_MODULE);
}
static const struct device_type bt_host = {
.name = "host",
.release = bt_host_release,
};
void hci_init_sysfs(struct hci_dev *hdev)
{
struct device *dev = &hdev->dev;
dev->type = &bt_host;
dev->class = bt_class;
__module_get(THIS_MODULE);
device_initialize(dev);
}
int __init bt_sysfs_init(void)
{
bt_class = class_create(THIS_MODULE, "bluetooth");
return PTR_ERR_OR_ZERO(bt_class);
}
void bt_sysfs_cleanup(void)
{
class_destroy(bt_class);
}
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