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>

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index e8beffe80b31799e781686c9d07ea8079cece756..a57dbfccb3fb66872d63a4f382513db39ce205e5 100644 (file)
--- 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;

diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 50113db06b9f54144e455193279deec4900028cc..9694d9d609054968785456f7eeb9e99a5185b7b0 100644 (file)
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -31,6 +31,8 @@
 #define HCIUARTSETPROTO                _IOW('U', 200, int)
 #define HCIUARTGETPROTO                _IOR('U', 201, int)
 #define HCIUARTGETDEVICE       _IOR('U', 202, int)
+#define HCIUARTSETFLAGS                _IOW('U', 203, int)
+#define HCIUARTGETFLAGS                _IOR('U', 204, int)
 
 /* UART protocols */
 #define HCI_UART_MAX_PROTO     5
@@ -41,6 +43,8 @@
 #define HCI_UART_H4DS  3
 #define HCI_UART_LL    4
 
+#define HCI_UART_RAW_DEVICE    0
+
 struct hci_uart;
 
 struct hci_uart_proto {
@@ -57,6 +61,7 @@ struct hci_uart {
        struct tty_struct       *tty;
        struct hci_dev          *hdev;
        unsigned long           flags;
+       unsigned long           hdev_flags;
 
        struct hci_uart_proto   *proto;
        void                    *priv;
@@ -66,7 +71,7 @@ struct hci_uart {
        spinlock_t              rx_lock;
 };
 
-/* HCI_UART flag bits */
+/* HCI_UART proto flag bits */
 #define HCI_UART_PROTO_SET     0
 
 /* TX states  */

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 547452de5ca2b66edcc75b11212e00a86a3c978e..8ea5e337450752ce4ed182672e27e8b4186280c0 100644 (file)
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -604,6 +604,8 @@ static int ioc_settimeout(unsigned int fd, unsigned int cmd,
 #define HCIUARTSETPROTO                _IOW('U', 200, int)
 #define HCIUARTGETPROTO                _IOR('U', 201, int)
 #define HCIUARTGETDEVICE       _IOR('U', 202, int)
+#define HCIUARTSETFLAGS                _IOW('U', 203, int)
+#define HCIUARTGETFLAGS                _IOR('U', 204, int)
 
 #define BNEPCONNADD    _IOW('B', 200, int)
 #define BNEPCONNDEL    _IOW('B', 201, int)