1 files changed, 214 insertions, 0 deletions

diff --git a/kernel/net/bluetooth/hci_sysfs.c b/kernel/net/bluetooth/hci_sysfs.c
new file mode 100644
index 000000000..555982a78
--- /dev/null
+++ b/kernel/net/bluetooth/hci_sysfs.c
@@ -0,0 +1,214 @@
+/* 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 inline char *link_typetostr(int type)
+{
+	switch (type) {
+	case ACL_LINK:
+		return "ACL";
+	case SCO_LINK:
+		return "SCO";
+	case ESCO_LINK:
+		return "eSCO";
+	case LE_LINK:
+		return "LE";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static ssize_t show_link_type(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct hci_conn *conn = to_hci_conn(dev);
+	return sprintf(buf, "%s\n", link_typetostr(conn->type));
+}
+
+static ssize_t show_link_address(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct hci_conn *conn = to_hci_conn(dev);
+	return sprintf(buf, "%pMR\n", &conn->dst);
+}
+
+#define LINK_ATTR(_name, _mode, _show, _store) \
+struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
+
+static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
+static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
+
+static struct attribute *bt_link_attrs[] = {
+	&link_attr_type.attr,
+	&link_attr_address.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(bt_link);
+
+static void bt_link_release(struct device *dev)
+{
+	struct hci_conn *conn = to_hci_conn(dev);
+	kfree(conn);
+}
+
+static struct device_type bt_link = {
+	.name    = "link",
+	.groups  = bt_link_groups,
+	.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_DBG("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_DBG("conn %p", conn);
+
+	dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
+
+	if (device_add(&conn->dev) < 0) {
+		BT_ERR("Failed to register connection device");
+		return;
+	}
+
+	hci_dev_hold(hdev);
+}
+
+void hci_conn_del_sysfs(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	if (!device_is_registered(&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_del(&conn->dev);
+
+	hci_dev_put(hdev);
+}
+
+static inline char *host_typetostr(int type)
+{
+	switch (type) {
+	case HCI_BREDR:
+		return "BR/EDR";
+	case HCI_AMP:
+		return "AMP";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static ssize_t show_type(struct device *dev,
+			 struct device_attribute *attr, char *buf)
+{
+	struct hci_dev *hdev = to_hci_dev(dev);
+	return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
+}
+
+static ssize_t show_name(struct device *dev,
+			 struct device_attribute *attr, char *buf)
+{
+	struct hci_dev *hdev = to_hci_dev(dev);
+	char name[HCI_MAX_NAME_LENGTH + 1];
+	int i;
+
+	for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
+		name[i] = hdev->dev_name[i];
+
+	name[HCI_MAX_NAME_LENGTH] = '\0';
+	return sprintf(buf, "%s\n", name);
+}
+
+static ssize_t show_address(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct hci_dev *hdev = to_hci_dev(dev);
+	return sprintf(buf, "%pMR\n", &hdev->bdaddr);
+}
+
+static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
+
+static struct attribute *bt_host_attrs[] = {
+	&dev_attr_type.attr,
+	&dev_attr_name.attr,
+	&dev_attr_address.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(bt_host);
+
+static void bt_host_release(struct device *dev)
+{
+	struct hci_dev *hdev = to_hci_dev(dev);
+	kfree(hdev);
+	module_put(THIS_MODULE);
+}
+
+static struct device_type bt_host = {
+	.name    = "host",
+	.groups  = bt_host_groups,
+	.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);
+}