Bluetooth: Add HCIUARTSETFLAGS and HCIUARTGETFLAGS ioctls

This patch introduces two new ioctls: HCIUARTSETFLAGS and
HCIUARTGETFLAGS. The only flag available for now is HCI_UART_RAW_DEVICE
which allows to initialize a UART device into RAW mode from userspace.
This is particularly useful for experimenting with Bluetooth controllers
that don't yet have proper support in BlueZ.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index e8beffe80b31..a57dbfccb3fb 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -395,6 +395,9 @@ static int hci_uart_register_dev(struct hci_uart *hu)
         if (!reset)
                 set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 
+        if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags))
+                set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
+
         if (hci_register_dev(hdev) < 0) {
                 BT_ERR("Can't register HCI device");
                 hci_free_dev(hdev);
@@ -475,6 +478,15 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file * file,
                         return hu->hdev->id;
                 return -EUNATCH;
 
+        case HCIUARTSETFLAGS:
+                if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
+                        return -EBUSY;
+                hu->hdev_flags = arg;
+                break;
+
+        case HCIUARTGETFLAGS:
+                return hu->hdev_flags;
+
         default:
                 err = n_tty_ioctl_helper(tty, file, cmd, arg);
                 break;