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Bluetooth: HFP HF: SCO Initiate Audio connection

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This patch adds support to initiate audio connection from the stack.

< HCI Command: Setup Synchronous... (0x01|0x0028) plen 17  [hci0]
        Handle: 256
        Transmit bandwidth: 8000
        Receive bandwidth: 8000
        Max latency: 7
        Setting: 0x0060
          Input Coding: Linear
          Input Data Format: 2's complement
          Input Sample Size: 16-bit
          # of bits padding at MSB: 0
          Air Coding Format: CVSD
        Retransmission effort: Optimize for power consumption (0x01)
        Packet type: 0x003e
          HV2 may be used
          HV3 may be used
          EV3 may be used
          EV4 may be used
          EV5 may be used

Change-Id: I4f4c0788760c9bdaf75651825511ff6bcd06df59
Signed-off-by: Sathish Narasimman <sathish.narasimman@intel.com>
This commit is contained in:
Sathish Narasimman 2017-03-06 12:16:28 +05:30 • committed by Johan Hedberg
commit d33ea09968
3 changed files with 84 additions and 0 deletions
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11
include/bluetooth/conn.h
View file

@ -494,6 +494,17 @@ struct bt_br_conn_param {
struct bt_conn *bt_conn_create_br(const bt_addr_t *peer,
const struct bt_br_conn_param *param);
/** @brief Initiate an SCO connection to a remote device.
*
* Allows initiate new SCO link to remote peer using its address.
* Returns a new reference that the the caller is responsible for managing.
*
* @param peer Remote address.
*
* @return Valid connection object on success or NULL otherwise.
*/
struct bt_conn *bt_conn_create_sco(const bt_addr_t *peer);
#ifdef __cplusplus
}
#endif

11
include/bluetooth/hci.h
View file

@ -324,6 +324,17 @@ struct bt_hci_cp_accept_conn_req {
uint8_t role;
} __packed;
#define BT_HCI_OP_SETUP_SYNC_CONN BT_OP(BT_OGF_LINK_CTRL, 0x0028)
struct bt_hci_cp_setup_sync_conn {
uint16_t handle;
uint32_t tx_bandwidth;
uint32_t rx_bandwidth;
uint16_t max_latency;
uint16_t content_format;
uint8_t retrans_effort;
uint16_t pkt_type;
} __packed;
#define BT_HCI_OP_ACCEPT_SYNC_CONN_REQ BT_OP(BT_OGF_LINK_CTRL, 0x0029)
struct bt_hci_cp_accept_sync_conn_req {
bt_addr_t bdaddr;

62
subsys/bluetooth/host/conn.c
View file

@ -273,6 +273,68 @@ struct bt_conn *bt_conn_create_br(const bt_addr_t *peer,
return conn;
}
struct bt_conn *bt_conn_create_sco(const bt_addr_t *peer)
{
struct bt_hci_cp_setup_sync_conn *cp;
struct bt_conn *sco_conn;
struct net_buf *buf;
int link_type;
sco_conn = bt_conn_lookup_addr_sco(peer);
if (sco_conn) {
switch (sco_conn->state) {
return sco_conn;
case BT_CONN_CONNECT:
case BT_CONN_CONNECTED:
return sco_conn;
default:
bt_conn_unref(sco_conn);
return NULL;
}
}
if (BT_FEAT_LMP_ESCO_CAPABLE(bt_dev.features)) {
link_type = BT_HCI_ESCO;
} else {
link_type = BT_HCI_SCO;
}
sco_conn = bt_conn_add_sco(peer, link_type);
if (!sco_conn) {
return NULL;
}
buf = bt_hci_cmd_create(BT_HCI_OP_SETUP_SYNC_CONN, sizeof(*cp));
if (!buf) {
bt_sco_cleanup(sco_conn);
return NULL;
}
cp = net_buf_add(buf, sizeof(*cp));
memset(cp, 0, sizeof(*cp));
BT_ERR("handle : %x", sco_conn->sco.acl->handle);
cp->handle = sco_conn->sco.acl->handle;
cp->pkt_type = sco_conn->sco.pkt_type;
cp->tx_bandwidth = 0x00001f40;
cp->rx_bandwidth = 0x00001f40;
cp->max_latency = 0x0007;
cp->retrans_effort = 0x01;
cp->content_format = BT_VOICE_CVSD_16BIT;
if (bt_hci_cmd_send_sync(BT_HCI_OP_SETUP_SYNC_CONN, buf,
NULL) < 0) {
bt_sco_cleanup(sco_conn);
return NULL;
}
bt_conn_set_state(sco_conn, BT_CONN_CONNECT);
return sco_conn;
}
struct bt_conn *bt_conn_lookup_addr_sco(const bt_addr_t *peer)
{
int i;