/* 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 }; static struct attribute_group bt_link_group = { .attrs = bt_link_attrs, }; static const struct attribute_group *bt_link_groups[] = { &bt_link_group, NULL }; 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 }; static struct attribute_group bt_host_group = { .attrs = bt_host_attrs, }; static const struct attribute_group *bt_host_groups[] = { &bt_host_group, NULL }; 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); }