Bluetooth: Use extended LE Connection if supported

This implements extended LE craete connection and enhanced
LE conn complete event if the controller supports.

For now it is as good as legacy LE connection and event as
no new features in the extended connection is handled.

< HCI Command: LE Extended Create Connection (0x08|0x0043) plen 26
        Filter policy: White list is not used (0x00)
        Own address type: Public (0x00)
        Peer address type: Random (0x01)
        Peer address: DB:7E:2E:1D:85:E8 (Static)
        Initiating PHYs: 0x01
        Entry 0: LE 1M
          Scan interval: 60.000 msec (0x0060)
          Scan window: 60.000 msec (0x0060)
          Min connection interval: 50.00 msec (0x0028)
          Max connection interval: 70.00 msec (0x0038)
          Connection latency: 0 (0x0000)
          Supervision timeout: 420 msec (0x002a)
          Min connection length: 0.000 msec (0x0000)
          Max connection length: 0.000 msec (0x0000)
> HCI Event: Command Status (0x0f) plen 4
      LE Extended Create Connection (0x08|0x0043) ncmd 2
        Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 31
      LE Enhanced Connection Complete (0x0a)
        Status: Success (0x00)
        Handle: 3585
        Role: Master (0x00)
        Peer address type: Random (0x01)
        Peer address: DB:7E:2E:1D:85:E8 (Static)
        Local resolvable private address: 00:00:00:00:00:00 (Non-Resolvable)
        Peer resolvable private address: 00:00:00:00:00:00 (Non-Resolvable)
        Connection interval: 67.50 msec (0x0036)
        Connection latency: 0 (0x0000)
        Supervision timeout: 420 msec (0x002a)
        Master clock accuracy: 0x00
@ MGMT Event: Device Connected (0x000b) plen 40
        LE Address: DB:7E:2E:1D:85:E8 (Static)
        Flags: 0x00000000
        Data length: 27
        Name (complete): Designer Mouse
        Appearance: Mouse (0x03c2)
        Flags: 0x05
          LE Limited Discoverable Mode
          BR/EDR Not Supported
        16-bit Service UUIDs (complete): 1 entry
          Human Interface Device (0x1812)

Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

2 files changed, 38 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 0ec51eb14810..73e48be5bbb3 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1538,6 +1538,27 @@ struct hci_cp_le_set_ext_scan_enable {
 	__le16  period;
 } __packed;
 
+#define HCI_OP_LE_EXT_CREATE_CONN    0x2043
+struct hci_cp_le_ext_create_conn {
+	__u8      filter_policy;
+	__u8      own_addr_type;
+	__u8      peer_addr_type;
+	bdaddr_t  peer_addr;
+	__u8      phys;
+	__u8      data[0];
+} __packed;
+
+struct hci_cp_le_ext_conn_param {
+	__le16 scan_interval;
+	__le16 scan_window;
+	__le16 conn_interval_min;
+	__le16 conn_interval_max;
+	__le16 conn_latency;
+	__le16 supervision_timeout;
+	__le16 min_ce_len;
+	__le16 max_ce_len;
+} __packed;
+
 /* ---- HCI Events ---- */
 #define HCI_EV_INQUIRY_COMPLETE		0x01
 
@@ -2015,6 +2036,21 @@ struct hci_ev_le_ext_adv_report {
 	__u8	 data[0];
 } __packed;
 
+#define HCI_EV_LE_ENHANCED_CONN_COMPLETE    0x0a
+struct hci_ev_le_enh_conn_complete {
+	__u8      status;
+	__le16    handle;
+	__u8      role;
+	__u8      bdaddr_type;
+	bdaddr_t  bdaddr;
+	bdaddr_t  local_rpa;
+	bdaddr_t  peer_rpa;
+	__le16    interval;
+	__le16    latency;
+	__le16    supervision_timeout;
+	__u8      clk_accurancy;
+} __packed;
+
 /* Internal events generated by Bluetooth stack */
 #define HCI_EV_STACK_INTERNAL	0xfd
 struct hci_ev_stack_internal {
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index cc0bde74dd45..a74453571264 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1161,6 +1161,8 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
 /* Use ext scanning if set ext scan param and ext scan enable is supported */
 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
 			   ((dev)->commands[37] & 0x40))
+/* Use ext create connection if command is supported */
+#define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
 
 /* ----- HCI protocols ----- */
 #define HCI_PROTO_DEFER             0x01