From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
This patch adds the reading of the LE advertising channel TX power to
the HCI init sequence of LE-capable controllers. This data will be used
e.g. for inclusion in the advertising data packets when advertising is
enabled.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
Acked-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
include/net/bluetooth/hci.h | 6 ++++++
include/net/bluetooth/hci_core.h | 2 ++
net/bluetooth/hci_event.c | 20 ++++++++++++++++++++
3 files changed, 28 insertions(+)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 88cbbda..348f4bf 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -932,6 +932,12 @@ struct hci_rp_le_read_buffer_size {
__u8 le_max_pkt;
} __packed;
+#define HCI_OP_LE_READ_ADV_TX_POWER 0x2007
+struct hci_rp_le_read_adv_tx_power {
+ __u8 status;
+ __s8 tx_power;
+} __packed;
+
#define HCI_OP_LE_SET_SCAN_PARAM 0x200b
struct hci_cp_le_set_scan_param {
__u8 type;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 9fe8e2d..8260bf2 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -278,6 +278,8 @@ struct hci_dev {
struct work_struct le_scan;
struct le_scan_params le_scan_params;
+ __s8 adv_tx_power;
+
int (*open)(struct hci_dev *hdev);
int (*close)(struct hci_dev *hdev);
int (*flush)(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 78f1af5..fd5a51c 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -594,6 +594,9 @@ static void le_init(struct hci_dev *hdev)
{
/* Read LE Buffer Size */
hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
+
+ /* Read LE Advertising Channel TX Power */
+ hci_send_cmd(hdev, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
}
static void hci_setup(struct hci_dev *hdev)
@@ -1073,6 +1076,19 @@ static void hci_cc_le_read_buffer_size(struct hci_dev *hdev,
hci_req_complete(hdev, HCI_OP_LE_READ_BUFFER_SIZE, rp->status);
}
+static void hci_cc_le_read_adv_tx_power(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ struct hci_rp_le_read_adv_tx_power *rp = (void *) skb->data;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ if (!rp->status)
+ hdev->adv_tx_power = rp->tx_power;
+
+ hci_req_complete(hdev, HCI_OP_LE_READ_ADV_TX_POWER, rp->status);
+}
+
static void hci_cc_le_set_event_mask(struct hci_dev *hdev, struct sk_buff *skb)
{
__u8 status = *((__u8 *) skb->data);
@@ -2505,6 +2521,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_cc_le_read_buffer_size(hdev, skb);
break;
+ case HCI_OP_LE_READ_ADV_TX_POWER:
+ hci_cc_le_read_adv_tx_power(hdev, skb);
+ break;
+
case HCI_OP_LE_SET_EVENT_MASK:
hci_cc_le_set_event_mask(hdev, skb);
break;
--
1.7.10.4
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