Bluetooth: Add tracking of local and piconet clock values

This patch adds support for storing the local and piconet clock values
from the HCI_Read_Clock command response to the hci_dev and hci_conn
structs. This will be later used in another patch to implement support
for the Get Clock Info mgmt command.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 7a23324eac39..315d615ca3f9 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -721,6 +721,41 @@ static void hci_cc_read_data_block_size(struct hci_dev *hdev,
                hdev->block_cnt, hdev->block_len);
 }
 
+static void hci_cc_read_clock(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        struct hci_rp_read_clock *rp = (void *) skb->data;
+        struct hci_cp_read_clock *cp;
+        struct hci_conn *conn;
+
+        BT_DBG("%s", hdev->name);
+
+        if (skb->len < sizeof(*rp))
+                return;
+
+        if (rp->status)
+                return;
+
+        hci_dev_lock(hdev);
+
+        cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
+        if (!cp)
+                goto unlock;
+
+        if (cp->which == 0x00) {
+                hdev->clock = le32_to_cpu(rp->clock);
+                goto unlock;
+        }
+
+        conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+        if (conn) {
+                conn->clock = le32_to_cpu(rp->clock);
+                conn->clock_accuracy = le16_to_cpu(rp->accuracy);
+        }
+
+unlock:
+        hci_dev_unlock(hdev);
+}
+
 static void hci_cc_read_local_amp_info(struct hci_dev *hdev,
                                        struct sk_buff *skb)
 {
@@ -2597,6 +2632,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
                 hci_cc_read_local_amp_info(hdev, skb);
                 break;
 
+        case HCI_OP_READ_CLOCK:
+                hci_cc_read_clock(hdev, skb);
+                break;
+
         case HCI_OP_READ_LOCAL_AMP_ASSOC:
                 hci_cc_read_local_amp_assoc(hdev, skb);
                 break;