In HFP offload usecase, Intel controllers require offload use
case id (NBS or WBS) to be set before opening SCO connection. Define
a new callback which gets called on setsockopt SCO socket. User space
audio module is expected to set codec via setsockopt(sk, BT_CODEC, ....)
before opening SCO connection.
Signed-off-by: Kiran K <kiran.k@xxxxxxxxx>
Reviewed-by: Chethan T N <chethan.tumkur.narayan@xxxxxxxxx>
Reviewed-by: Srivatsa Ravishankar <ravishankar.srivatsa@xxxxxxxxx>
---
This callback gets called when audio module does setsockopt(sk, BT_CODEC,...)
on SCO socket and data_path is 1 (non-HCI transport). For non-HCI transport,
Intel controller expects presets to be set before opening SCO connection.
Presets are pre-defined, 0 - NBS, 1 - WBS. Likewise additional presets will
be defined for A2DP, LE Audio offload use cases.
drivers/bluetooth/btintel.c | 50 ++++++++++++++++++++++++++++++++
drivers/bluetooth/btintel.h | 8 +++++
drivers/bluetooth/btusb.c | 1 +
include/net/bluetooth/hci.h | 8 +++++
include/net/bluetooth/hci_core.h | 2 ++
5 files changed, 69 insertions(+)
diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 8407e9736c62..8efb15504973 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -1308,6 +1308,56 @@ int btintel_get_data_path_id(struct hci_dev *hdev)
}
EXPORT_SYMBOL_GPL(btintel_get_data_path_id);
+int btintel_configure_data_path(struct hci_dev *hdev, __u8 type,
+ struct bt_codec *codec)
+{
+ __u8 preset;
+ struct hci_op_configure_data_path *cmd;
+ __u8 buffer[255];
+ struct sk_buff *skb;
+
+ if (type != SCO_LINK && type != ESCO_LINK)
+ return -EINVAL;
+
+ switch (codec->id) {
+ case 0x02:
+ preset = 0x00;
+ break;
+ case 0x05:
+ preset = 0x01;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ cmd = (void *)buffer;
+ cmd->data_path_id = 0x01;
+ cmd->len = 1;
+ cmd->data[0] = preset;
+
+ cmd->direction = 0x00;
+ skb = __hci_cmd_sync(hdev, HCI_CONFIGURE_DATA_PATH, sizeof(*cmd) + 1,
+ cmd, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(hdev, "configure input data path failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+ kfree_skb(skb);
+
+ cmd->direction = 0x01;
+ skb = __hci_cmd_sync(hdev, HCI_CONFIGURE_DATA_PATH, sizeof(*cmd) + 1,
+ cmd, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(hdev, "configure output data path failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+ kfree_skb(skb);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(btintel_configure_data_path);
+
MODULE_AUTHOR("Marcel Holtmann <marcel@xxxxxxxxxxxx>");
MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
MODULE_VERSION(VERSION);
diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
index 6d4edfd16d44..f4af22ecdc0d 100644
--- a/drivers/bluetooth/btintel.h
+++ b/drivers/bluetooth/btintel.h
@@ -177,6 +177,8 @@ int btintel_set_debug_features(struct hci_dev *hdev,
const struct intel_debug_features *features);
int btintel_read_offload_usecases(struct hci_dev *hdev);
int btintel_get_data_path_id(struct hci_dev *hdev);
+int btintel_configure_data_path(struct hci_dev *hdev, __u8 type,
+ struct bt_codec *codec);
#else
static inline int btintel_check_bdaddr(struct hci_dev *hdev)
@@ -318,4 +320,10 @@ static int btintel_get_data_path_id(struct hci_dev *hdev)
{
return -EOPNOTSUPP;
}
+
+static int btintel_configure_data_path(struct hci_dev *hdev, __u8 type,
+ struct bt_codec *codec)
+{
+ return -EOPNOTSUPP;
+}
#endif
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index f7b349db392a..220e7c85db10 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4632,6 +4632,7 @@ static int btusb_probe(struct usb_interface *intf,
hdev->set_bdaddr = btintel_set_bdaddr;
hdev->cmd_timeout = btusb_intel_cmd_timeout;
hdev->get_data_path_id = btintel_get_data_path_id;
+ hdev->configure_data_path = btintel_configure_data_path;
set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 9658600ae5de..bd666b114aea 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1257,6 +1257,14 @@ struct hci_rp_read_local_oob_ext_data {
__u8 rand256[16];
} __packed;
+#define HCI_CONFIGURE_DATA_PATH 0x0c83
+struct hci_op_configure_data_path {
+ __u8 direction;
+ __u8 data_path_id;
+ __u8 len;
+ __u8 data[];
+} __packed;
+
#define HCI_OP_READ_LOCAL_VERSION 0x1001
struct hci_rp_read_local_version {
__u8 status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 78d1ebab58f6..959585bafa8d 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -618,6 +618,8 @@ struct hci_dev {
void (*cmd_timeout)(struct hci_dev *hdev);
bool (*prevent_wake)(struct hci_dev *hdev);
int (*get_data_path_id)(struct hci_dev *hdev);
+ int (*configure_data_path)(struct hci_dev *hdev, __u8 type,
+ struct bt_codec *codec);
};
#define HCI_PHY_HANDLE(handle) (handle & 0xff)
--
2.17.1
