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bluetooth: conn: add api for getting tx power level

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Added a new Bluetooth API that can be used to read the current and
maximum transmit power level of the radio. The reading operation is
performed over HCI.

Signed-off-by: Kamil Piszczek <Kamil.Piszczek@nordicsemi.no>
This commit is contained in:
Kamil Piszczek 2020-07-06 10:01:04 -04:00 • committed by Carles Cufí
commit fd8d03bd8b
2 changed files with 78 additions and 0 deletions
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24
include/bluetooth/conn.h
View file

@ -370,6 +370,19 @@ struct bt_conn_remote_info {
};
};
/** LE Transmit Power Level Structure */
struct bt_conn_le_tx_power {
/** Input: 1M, 2M, Coded S2 or Coded S8 */
uint8_t phy;
/** Output: current transmit power level */
int8_t current_level;
/** Output: maximum transmit power level */
int8_t max_level;
};
/** @brief Get connection info
*
* @param conn Connection object.
@ -397,6 +410,17 @@ int bt_conn_get_info(const struct bt_conn *conn, struct bt_conn_info *info);
int bt_conn_get_remote_info(struct bt_conn *conn,
struct bt_conn_remote_info *remote_info);
/** @brief Get connection transmit power level.
*
* @param conn Connection object.
* @param tx_power_level Transmit power level descriptor.
*
* @return Zero on success or (negative) error code on failure.
* @return -ENOBUFS HCI command buffer is not available.
*/
int bt_conn_le_get_tx_power_level(struct bt_conn *conn,
struct bt_conn_le_tx_power *tx_power_level);
/** @brief Update the connection parameters.
*
* If the local device is in the peripheral role then updating the connection

54
subsys/bluetooth/host/conn.c
View file

@ -1974,6 +1974,60 @@ int bt_conn_get_remote_info(struct bt_conn *conn,
}
}
/* Read Transmit Power Level HCI command */
static int bt_conn_get_tx_power_level(struct bt_conn *conn, uint8_t type,
int8_t *tx_power_level)
{
int err;
struct bt_hci_rp_read_tx_power_level *rp;
struct net_buf *rsp;
struct bt_hci_cp_read_tx_power_level *cp;
struct net_buf *buf;
buf = bt_hci_cmd_create(BT_HCI_OP_READ_TX_POWER_LEVEL, sizeof(*cp));
if (!buf) {
return -ENOBUFS;
}
cp = net_buf_add(buf, sizeof(*cp));
cp->type = type;
cp->handle = sys_cpu_to_le16(conn->handle);
err = bt_hci_cmd_send_sync(BT_HCI_OP_READ_TX_POWER_LEVEL, buf, &rsp);
if (err) {
return err;
}
rp = (void *) rsp->data;
*tx_power_level = rp->tx_power_level;
net_buf_unref(rsp);
return 0;
}
int bt_conn_le_get_tx_power_level(struct bt_conn *conn,
struct bt_conn_le_tx_power *tx_power_level)
{
int err;
if (tx_power_level->phy != 0) {
/* Extend the implementation when LE Enhanced Read Transmit
* Power Level HCI command is available for use.
*/
return -ENOTSUP;
}
err = bt_conn_get_tx_power_level(conn, BT_TX_POWER_LEVEL_CURRENT,
&tx_power_level->current_level);
if (err) {
return err;
}
err = bt_conn_get_tx_power_level(conn, BT_TX_POWER_LEVEL_MAX,
&tx_power_level->max_level);
return err;
}
static int conn_disconnect(struct bt_conn *conn, uint8_t reason)
{
int err;