commit 5e0452c00a2e4b04ec1482248c897dacf106f1df
author Andre Guedes <andre.guedes@openbossa.org> Fri Feb 17 20:39:38 2012 -0300
committer Johan Hedberg <johan.hedberg@intel.com> Sun Feb 19 12:34:55 2012 +0200
tree 34bbd940ed96cc736dcd8dd9311414f8f035839e
parent 343f935bfa44189c68527102c409286b0cfc4526

Bluetooth: Interleaved discovery support

This patch adds interleaved discovery support to MGMT Start
Discovery command.

In case interleaved discovery is not supported (not a dual mode
device), we perform BR/EDR or LE-only discovery according to the
device capabilities.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/mgmt.c

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index a9cd38d..89754bb 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -108,8 +108,10 @@
 #define LE_SCAN_WIN			0x12
 #define LE_SCAN_INT			0x12
 #define LE_SCAN_TIMEOUT_LE_ONLY		10240	/* TGAP(gen_disc_scan_min) */
+#define LE_SCAN_TIMEOUT_BREDR_LE	5120	/* TGAP(100)/2 */
 
 #define INQUIRY_LEN_BREDR		0x08	/* TGAP(100) */
+#define INQUIRY_LEN_BREDR_LE		0x04	/* TGAP(100)/2 */
 
 #define SERVICE_CACHE_TIMEOUT (5 * 1000)
 
@@ -2153,6 +2155,46 @@
 	return err;
 }
 
+static int discovery(struct hci_dev *hdev)
+{
+	int err;
+
+	if (lmp_host_le_capable(hdev)) {
+		if (lmp_bredr_capable(hdev)) {
+			err = hci_le_scan(hdev, LE_SCAN_TYPE,
+						LE_SCAN_INT, LE_SCAN_WIN,
+						LE_SCAN_TIMEOUT_BREDR_LE);
+		} else {
+			hdev->discovery.type = DISCOV_TYPE_LE;
+			err = hci_le_scan(hdev, LE_SCAN_TYPE,
+						LE_SCAN_INT, LE_SCAN_WIN,
+						LE_SCAN_TIMEOUT_LE_ONLY);
+		}
+	} else {
+		hdev->discovery.type = DISCOV_TYPE_BREDR;
+		err = hci_do_inquiry(hdev, INQUIRY_LEN_BREDR);
+	}
+
+	return err;
+}
+
+int mgmt_interleaved_discovery(struct hci_dev *hdev)
+{
+	int err;
+
+	BT_DBG("%s", hdev->name);
+
+	hci_dev_lock(hdev);
+
+	err = hci_do_inquiry(hdev, INQUIRY_LEN_BREDR_LE);
+	if (err < 0)
+		hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+
+	hci_dev_unlock(hdev);
+
+	return err;
+}
+
 static int start_discovery(struct sock *sk, u16 index,
 						void *data, u16 len)
 {
@@ -2196,7 +2238,6 @@
 
 	switch (hdev->discovery.type) {
 	case DISCOV_TYPE_BREDR:
-	case DISCOV_TYPE_INTERLEAVED:
 		err = hci_do_inquiry(hdev, INQUIRY_LEN_BREDR);
 		break;
 
@@ -2205,6 +2246,10 @@
 					LE_SCAN_WIN, LE_SCAN_TIMEOUT_LE_ONLY);
 		break;
 
+	case DISCOV_TYPE_INTERLEAVED:
+		err = discovery(hdev);
+		break;
+
 	default:
 		err = -EINVAL;
 	}