From 8095ed769f41eebf5d5878f7172e056d6215878f Mon Sep 17 00:00:00 2001
From: Sudha Bheemanna <b.sudha@samsung.com>
Date: Thu, 8 Sep 2016 12:24:43 +0530
Subject: Bluetooth: Set link Supervision timeout for a connection

This patch allows to set the supervision timeout for a connection
if the device role is master.

Change-Id: I7897167ec07803f3059f2ab4d3314b0b7a951533
Signed-off-by: Sudha Bheemanna <b.sudha@samsung.com>
---
 net/bluetooth/hci_conn.c  | 27 +++++++++++++++++++++++++++
 net/bluetooth/hci_core.c  |  7 +++++++
 net/bluetooth/hci_event.c | 10 ++++++++++
 3 files changed, 44 insertions(+)

(limited to 'net')

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 24a1965b1d23..420ebf1aebcd 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1147,6 +1147,29 @@ int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
 }
 EXPORT_SYMBOL(hci_conn_switch_role);
 
+#ifdef TIZEN_BT
+int hci_conn_change_supervision_timeout(struct hci_conn *conn, __u16 timeout)
+{
+	struct hci_cp_write_link_supervision_timeout cp;
+
+	if (!((get_link_mode(conn)) & HCI_LM_MASTER))
+		return 1;
+
+	if (conn->handle == 0)
+		return 1;
+
+	memset(&cp, 0, sizeof(cp));
+	cp.handle  = cpu_to_le16(conn->handle);
+	cp.timeout = cpu_to_le16(timeout);
+
+	if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_LINK_SUPERVISION_TIMEOUT,
+			 sizeof(cp), &cp) < 0)
+		BT_ERR("HCI_OP_WRITE_LINK_SUPERVISION_TIMEOUT is failed");
+
+	return 0;
+}
+#endif
+
 /* Enter active mode */
 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
 {
@@ -1204,7 +1227,11 @@ void hci_conn_check_pending(struct hci_dev *hdev)
 	hci_dev_unlock(hdev);
 }
 
+#ifndef TIZEN_BT
 static u32 get_link_mode(struct hci_conn *conn)
+#else
+u32 get_link_mode(struct hci_conn *conn)
+#endif
 {
 	u32 link_mode = 0;
 
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index dd2cf2ac14d5..c821ee72c8fc 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3092,12 +3092,19 @@ struct hci_dev *hci_alloc_dev(void)
 	hdev->adv_tx_power = HCI_TX_POWER_INVALID;
 
 	hdev->sniff_max_interval = 800;
+#ifdef TIZEN_BT
+	hdev->sniff_min_interval = 400;
+#else
 	hdev->sniff_min_interval = 80;
+#endif
 
 	hdev->le_adv_channel_map = 0x07;
 	hdev->le_adv_min_interval = 0x0800;
 	hdev->le_adv_max_interval = 0x0800;
 #ifdef TIZEN_BT
+	/* automatically enable sniff mode for connection */
+	hdev->idle_timeout = TIZEN_SNIFF_TIMEOUT * 1000;
+
 	hdev->adv_filter_policy = 0x00;
 	hdev->adv_type = 0x00;
 #endif
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 1a63bceb8c69..169ff4302382 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2400,6 +2400,11 @@ static void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
 			hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
 				     &cp);
 		}
+#ifdef TIZEN_BT
+		if (get_link_mode(conn) & HCI_LM_MASTER)
+			hci_conn_change_supervision_timeout(conn,
+					LINK_SUPERVISION_TIMEOUT);
+#endif
 	} else {
 		conn->state = BT_CLOSED;
 		if (conn->type == ACL_LINK)
@@ -3343,6 +3348,11 @@ static void hci_role_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
 
 		hci_role_switch_cfm(conn, ev->status, ev->role);
+#ifdef TIZEN_BT
+		if (!ev->status && (get_link_mode(conn) & HCI_LM_MASTER))
+			hci_conn_change_supervision_timeout(conn,
+					LINK_SUPERVISION_TIMEOUT);
+#endif
 	}
 
 	hci_dev_unlock(hdev);
-- 
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