The hci UART line discipline sends its characters in a workqueue. Some
devices like the Marvell Bluetooth chips need to make sure that all
queued characters are sent before switching the baudrate. This adds
a function to synchronize with the workqueue.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
goto restart;
clear_bit(HCI_UART_SENDING, &hu->tx_state);
+ wake_up_bit(&hu->tx_state, HCI_UART_SENDING);
}
void hci_uart_init_work(struct work_struct *work)
return 0;
}
+int hci_uart_wait_until_sent(struct hci_uart *hu)
+{
+ return wait_on_bit_timeout(&hu->tx_state, HCI_UART_SENDING,
+ TASK_INTERRUPTIBLE,
+ msecs_to_jiffies(2000));
+}
+
/* ------- Interface to HCI layer ------ */
/* Reset device */
static int hci_uart_flush(struct hci_dev *hdev)
void hci_uart_unregister_device(struct hci_uart *hu);
int hci_uart_tx_wakeup(struct hci_uart *hu);
+int hci_uart_wait_until_sent(struct hci_uart *hu);
int hci_uart_init_ready(struct hci_uart *hu);
void hci_uart_init_work(struct work_struct *work);
void hci_uart_set_baudrate(struct hci_uart *hu, unsigned int speed);