Bluetooth: Add BT_PHY socket option

This adds BT_PHY socket option (read-only) which can be used to read
the PHYs in use by the underline connection.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 107 insertions, 0 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 87691404d0c6..65fa44cbe514 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1725,3 +1725,110 @@ struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
 
 	return hchan;
 }
+
+u32 hci_conn_get_phy(struct hci_conn *conn)
+{
+	u32 phys = 0;
+
+	hci_dev_lock(conn->hdev);
+
+	/* BLUETOOTH CORE SPECIFICATION Version 5.2 | Vol 2, Part B page 471:
+	 * Table 6.2: Packets defined for synchronous, asynchronous, and
+	 * CSB logical transport types.
+	 */
+	switch (conn->type) {
+	case SCO_LINK:
+		/* SCO logical transport (1 Mb/s):
+		 * HV1, HV2, HV3 and DV.
+		 */
+		phys |= BT_PHY_BR_1M_1SLOT;
+
+		break;
+
+	case ACL_LINK:
+		/* ACL logical transport (1 Mb/s) ptt=0:
+		 * DH1, DM3, DH3, DM5 and DH5.
+		 */
+		phys |= BT_PHY_BR_1M_1SLOT;
+
+		if (conn->pkt_type & (HCI_DM3 | HCI_DH3))
+			phys |= BT_PHY_BR_1M_3SLOT;
+
+		if (conn->pkt_type & (HCI_DM5 | HCI_DH5))
+			phys |= BT_PHY_BR_1M_5SLOT;
+
+		/* ACL logical transport (2 Mb/s) ptt=1:
+		 * 2-DH1, 2-DH3 and 2-DH5.
+		 */
+		if (!(conn->pkt_type & HCI_2DH1))
+			phys |= BT_PHY_EDR_2M_1SLOT;
+
+		if (!(conn->pkt_type & HCI_2DH3))
+			phys |= BT_PHY_EDR_2M_3SLOT;
+
+		if (!(conn->pkt_type & HCI_2DH5))
+			phys |= BT_PHY_EDR_2M_5SLOT;
+
+		/* ACL logical transport (3 Mb/s) ptt=1:
+		 * 3-DH1, 3-DH3 and 3-DH5.
+		 */
+		if (!(conn->pkt_type & HCI_3DH1))
+			phys |= BT_PHY_EDR_3M_1SLOT;
+
+		if (!(conn->pkt_type & HCI_3DH3))
+			phys |= BT_PHY_EDR_3M_3SLOT;
+
+		if (!(conn->pkt_type & HCI_3DH5))
+			phys |= BT_PHY_EDR_3M_5SLOT;
+
+		break;
+
+	case ESCO_LINK:
+		/* eSCO logical transport (1 Mb/s): EV3, EV4 and EV5 */
+		phys |= BT_PHY_BR_1M_1SLOT;
+
+		if (!(conn->pkt_type & (ESCO_EV4 | ESCO_EV5)))
+			phys |= BT_PHY_BR_1M_3SLOT;
+
+		/* eSCO logical transport (2 Mb/s): 2-EV3, 2-EV5 */
+		if (!(conn->pkt_type & ESCO_2EV3))
+			phys |= BT_PHY_EDR_2M_1SLOT;
+
+		if (!(conn->pkt_type & ESCO_2EV5))
+			phys |= BT_PHY_EDR_2M_3SLOT;
+
+		/* eSCO logical transport (3 Mb/s): 3-EV3, 3-EV5 */
+		if (!(conn->pkt_type & ESCO_3EV3))
+			phys |= BT_PHY_EDR_3M_1SLOT;
+
+		if (!(conn->pkt_type & ESCO_3EV5))
+			phys |= BT_PHY_EDR_3M_3SLOT;
+
+		break;
+
+	case LE_LINK:
+		if (conn->le_tx_phy & HCI_LE_SET_PHY_1M)
+			phys |= BT_PHY_LE_1M_TX;
+
+		if (conn->le_rx_phy & HCI_LE_SET_PHY_1M)
+			phys |= BT_PHY_LE_1M_RX;
+
+		if (conn->le_tx_phy & HCI_LE_SET_PHY_2M)
+			phys |= BT_PHY_LE_2M_TX;
+
+		if (conn->le_rx_phy & HCI_LE_SET_PHY_2M)
+			phys |= BT_PHY_LE_2M_RX;
+
+		if (conn->le_tx_phy & HCI_LE_SET_PHY_CODED)
+			phys |= BT_PHY_LE_CODED_TX;
+
+		if (conn->le_rx_phy & HCI_LE_SET_PHY_CODED)
+			phys |= BT_PHY_LE_CODED_RX;
+
+		break;
+	}
+
+	hci_dev_unlock(conn->hdev);
+
+	return phys;
+}