Bluetooth: Add support for reading LE supported states

The LE supported states indicate the states and state combinations that
the link layer supports. This is important information for knowing what
operations are possible when dealing with multiple connected devices.
This patch adds reading of the supported states to the HCI init
sequence.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

2 files changed, 7 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index f1766a6f4954..7f12c25f1fca 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1045,6 +1045,12 @@ struct hci_rp_le_ltk_neg_reply {
         __le16  handle;
 } __packed;
 
+#define HCI_OP_LE_READ_SUPPORTED_STATES 0x201c
+struct hci_rp_le_read_supported_states {
+        __u8    status;
+        __u8    le_states[8];
+} __packed;
+
 /* ---- HCI Events ---- */
 #define HCI_EV_INQUIRY_COMPLETE         0x01
 
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index d6ed4ac18d83..bcf8ffe2a843 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -154,6 +154,7 @@ struct hci_dev {
         __u8            host_features[8];
         __u8            le_features[8];
         __u8            le_white_list_size;
+        __u8            le_states[8];
         __u8            commands[64];
         __u8            hci_ver;
         __u16           hci_rev;