Bluetooth: Store TX power level for connection
This patch adds support to store local TX power level for connection
when reply for HCI_Read_Transmit_Power_Level is received.
Signed-off-by: Andrzej Kaczmarek <andrzej.kaczmarek@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index ad2ecc9..16587dc 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1054,6 +1054,17 @@
__le16 window;
} __packed;
+#define HCI_OP_READ_TX_POWER 0x0c2d
+struct hci_cp_read_tx_power {
+ __le16 handle;
+ __u8 type;
+} __packed;
+struct hci_rp_read_tx_power {
+ __u8 status;
+ __le16 handle;
+ __s8 tx_power;
+} __packed;
+
#define HCI_OP_READ_PAGE_SCAN_TYPE 0x0c46
struct hci_rp_read_page_scan_type {
__u8 status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 0318d52..211bad6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -375,6 +375,7 @@
__u16 le_conn_min_interval;
__u16 le_conn_max_interval;
__s8 rssi;
+ __s8 tx_power;
unsigned long flags;
__u8 remote_cap;
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 55a1743..74b368b 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -407,6 +407,7 @@
conn->io_capability = hdev->io_capability;
conn->remote_auth = 0xff;
conn->key_type = 0xff;
+ conn->tx_power = HCI_TX_POWER_INVALID;
set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 2bb0053..fa614e3 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1264,6 +1264,30 @@
hci_dev_unlock(hdev);
}
+static void hci_cc_read_tx_power(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_cp_read_tx_power *sent;
+ struct hci_rp_read_tx_power *rp = (void *) skb->data;
+ struct hci_conn *conn;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ if (rp->status)
+ return;
+
+ sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
+ if (!sent)
+ return;
+
+ hci_dev_lock(hdev);
+
+ conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
+ if (conn && sent->type == 0x00)
+ conn->tx_power = rp->tx_power;
+
+ 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);
@@ -2660,6 +2684,10 @@
hci_cc_read_rssi(hdev, skb);
break;
+ case HCI_OP_READ_TX_POWER:
+ hci_cc_read_tx_power(hdev, skb);
+ break;
+
default:
BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
break;