Bluetooth: hci_uart: Add setup callback

Some Bluetooth controllers require initialization before being
used (vendor config, firmware download). Add possibility for a
HCI UART proto to implement this early init via the setup callback.

Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index dc487b5d1156..48a0c250d5b8 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -261,6 +261,16 @@ static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
         return 0;
 }
 
+static int hci_uart_setup(struct hci_dev *hdev)
+{
+        struct hci_uart *hu = hci_get_drvdata(hdev);
+
+        if (hu->proto->setup)
+                return hu->proto->setup(hu);
+
+        return 0;
+}
+
 /* ------ LDISC part ------ */
 /* hci_uart_tty_open
  *
@@ -426,6 +436,7 @@ static int hci_uart_register_dev(struct hci_uart *hu)
         hdev->close = hci_uart_close;
         hdev->flush = hci_uart_flush;
         hdev->send  = hci_uart_send_frame;
+        hdev->setup = hci_uart_setup;
         SET_HCIDEV_DEV(hdev, hu->tty->dev);
 
         if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 247488edcbf9..074ed29092b4 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -59,6 +59,7 @@ struct hci_uart_proto {
         int (*flush)(struct hci_uart *hu);
         int (*recv)(struct hci_uart *hu, void *data, int len);
         int (*enqueue)(struct hci_uart *hu, struct sk_buff *skb);
+        int (*setup)(struct hci_uart *hu);
         struct sk_buff *(*dequeue)(struct hci_uart *hu);
 };