[PATCH v2] Bleutooth: Add definitions for LE Read Tx Power

[Ankit Navik <ankit.p.navik@xxxxxxxxx>]

Add the definitions for LE read transmit power HCI commands to
read the minimum and maximum Tx power.

Signed-off-by: Ankit Navik <ankit.p.navik@xxxxxxxxx>
---
 include/net/bluetooth/hci.h      |  7 +++++++
 include/net/bluetooth/hci_core.h |  3 +++
 net/bluetooth/hci_event.c        | 17 +++++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 07b6ece..eccb6b2 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1718,6 +1718,13 @@ struct hci_cp_le_set_adv_set_rand_addr {
 	bdaddr_t  bdaddr;
 } __packed;
 
+#define HCI_OP_LE_READ_TX_POWER		0x204b
+struct hci_rp_le_read_tx_power {
+	__u8 status;
+	__s8 min_tx_power;
+	__s8 max_tx_power;
+} __packed;
+
 /* ---- HCI Events ---- */
 #define HCI_EV_INQUIRY_COMPLETE		0x01
 
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index faebe38..f3d389d 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -418,6 +418,9 @@ struct hci_dev {
 	__u8			scan_rsp_data[HCI_MAX_AD_LENGTH];
 	__u8			scan_rsp_data_len;
 
+	__s8			le_min_tx_power;
+	__s8			le_max_tx_power;
+
 	struct list_head	adv_instances;
 	unsigned int		adv_instance_cnt;
 	__u8			cur_adv_instance;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 6ddc4a7..3646f77 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -988,6 +988,19 @@ static void hci_cc_le_read_adv_tx_power(struct hci_dev *hdev,
 	hdev->adv_tx_power = rp->tx_power;
 }
 
+static void hci_cc_le_read_tx_power(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_rp_le_read_tx_power *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+	if (rp->status)
+		return;
+
+	hdev->le_min_tx_power = rp->min_tx_power;
+	hdev->le_max_tx_power = rp->max_tx_power;
+}
+
 static void hci_cc_user_confirm_reply(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct hci_rp_user_confirm_reply *rp = (void *) skb->data;
@@ -3414,6 +3427,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
 		hci_cc_le_read_max_data_len(hdev, skb);
 		break;
 
+	case HCI_OP_LE_READ_TX_POWER:
+		hci_cc_le_read_tx_power(hdev, skb);
+		break;
+
 	case HCI_OP_WRITE_LE_HOST_SUPPORTED:
 		hci_cc_write_le_host_supported(hdev, skb);
 		break;
-- 
2.7.4