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Diffstat (limited to 'kernel/net/bluetooth/hci_sysfs.c')
-rw-r--r--kernel/net/bluetooth/hci_sysfs.c214
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);
+}