Bluetooth: Store RSSI for connection

This patch adds support to store RSSI for connection when reply for
HCI_Read_RSSI is received.

Signed-off-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

3 files changed, 34 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 4261a67682c0..ad2ecc92380d 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1064,6 +1064,16 @@ struct hci_rp_read_page_scan_type {
         #define PAGE_SCAN_TYPE_STANDARD         0x00
         #define PAGE_SCAN_TYPE_INTERLACED       0x01
 
+#define HCI_OP_READ_RSSI                0x1405
+struct hci_cp_read_rssi {
+        __le16   handle;
+} __packed;
+struct hci_rp_read_rssi {
+        __u8     status;
+        __le16   handle;
+        __s8     rssi;
+} __packed;
+
 #define HCI_OP_READ_LOCAL_AMP_INFO      0x1409
 struct hci_rp_read_local_amp_info {
         __u8     status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index d73f41855ada..0318d5263837 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -374,6 +374,7 @@ struct hci_conn {
         __u16           setting;
         __u16           le_conn_min_interval;
         __u16           le_conn_max_interval;
+        __s8            rssi;
         unsigned long   flags;
 
         __u8            remote_cap;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 07c37d0cecb2..2bb0053d4c45 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1245,6 +1245,25 @@ static void hci_cc_write_remote_amp_assoc(struct hci_dev *hdev,
         amp_write_rem_assoc_continue(hdev, rp->phy_handle);
 }
 
+static void hci_cc_read_rssi(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        struct hci_rp_read_rssi *rp = (void *) skb->data;
+        struct hci_conn *conn;
+
+        BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+        if (rp->status)
+                return;
+
+        hci_dev_lock(hdev);
+
+        conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+        if (conn)
+                conn->rssi = rp->rssi;
+
+        hci_dev_unlock(hdev);
+}
+
 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
 {
         BT_DBG("%s status 0x%2.2x", hdev->name, status);
@@ -2637,6 +2656,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
                 hci_cc_write_remote_amp_assoc(hdev, skb);
                 break;
 
+        case HCI_OP_READ_RSSI:
+                hci_cc_read_rssi(hdev, skb);
+                break;
+
         default:
                 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
                 break;