diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/ark3116.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c index d8f0267a2d5..a7c26990ec6 100644 --- a/drivers/usb/serial/ark3116.c +++ b/drivers/usb/serial/ark3116.c @@ -551,6 +551,60 @@ static int ark3116_tiocmget(struct tty_struct *tty, struct file *file) (ctrl & UART_MCR_OUT2 ? TIOCM_OUT2 : 0); } +static int ark3116_tiocmset(struct tty_struct *tty, struct file *file, + unsigned set, unsigned clr) +{ + struct usb_serial_port *port = tty->driver_data; + struct ark3116_private *priv = usb_get_serial_port_data(port); + + /* we need to take the mutex here, to make sure that the value + * in priv->mcr is actually the one that is in the hardware + */ + + mutex_lock(&priv->hw_lock); + + if (set & TIOCM_RTS) + priv->mcr |= UART_MCR_RTS; + if (set & TIOCM_DTR) + priv->mcr |= UART_MCR_DTR; + if (set & TIOCM_OUT1) + priv->mcr |= UART_MCR_OUT1; + if (set & TIOCM_OUT2) + priv->mcr |= UART_MCR_OUT2; + if (clr & TIOCM_RTS) + priv->mcr &= ~UART_MCR_RTS; + if (clr & TIOCM_DTR) + priv->mcr &= ~UART_MCR_DTR; + if (clr & TIOCM_OUT1) + priv->mcr &= ~UART_MCR_OUT1; + if (clr & TIOCM_OUT2) + priv->mcr &= ~UART_MCR_OUT2; + + ark3116_write_reg(port->serial, UART_MCR, priv->mcr); + + mutex_unlock(&priv->hw_lock); + + return 0; +} + +static void ark3116_break_ctl(struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = tty->driver_data; + struct ark3116_private *priv = usb_get_serial_port_data(port); + + /* LCR is also used for other things: protect access */ + mutex_lock(&priv->hw_lock); + + if (break_state) + priv->lcr |= UART_LCR_SBC; + else + priv->lcr &= ~UART_LCR_SBC; + + ark3116_write_reg(port->serial, UART_LCR, priv->lcr); + + mutex_unlock(&priv->hw_lock); +} + static struct usb_driver ark3116_driver = { .name = "ark3116", .probe = usb_serial_probe, @@ -573,8 +627,10 @@ static struct usb_serial_driver ark3116_device = { .init_termios = ark3116_init_termios, .ioctl = ark3116_ioctl, .tiocmget = ark3116_tiocmget, + .tiocmset = ark3116_tiocmset, .open = ark3116_open, .close = ark3116_close, + .break_ctl = ark3116_break_ctl, }; static int __init ark3116_init(void) |