sdio_uart: use tty_port
Add a tty_port object to the sdio uart. For the moment just begin using the tty field of the port, as this is the critical one to clean up. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -73,6 +73,7 @@ struct uart_icount {
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};
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struct sdio_uart_port {
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struct tty_port port;
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struct kref kref;
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struct tty_struct *tty;
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unsigned int index;
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@ -172,7 +173,7 @@ static void sdio_uart_port_remove(struct sdio_uart_port *port)
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port->func = NULL;
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mutex_unlock(&port->func_lock);
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if (port->opened)
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tty_hangup(port->tty);
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tty_hangup(port->port.tty);
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mutex_unlock(&port->open_lock);
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sdio_release_irq(func);
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sdio_disable_func(func);
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@ -391,7 +392,7 @@ static void sdio_uart_stop_rx(struct sdio_uart_port *port)
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static void sdio_uart_receive_chars(struct sdio_uart_port *port,
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unsigned int *status)
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{
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struct tty_struct *tty = port->tty;
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struct tty_struct *tty = port->port.tty;
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unsigned int ch, flag;
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int max_count = 256;
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@ -446,6 +447,7 @@ static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
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{
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struct circ_buf *xmit = &port->xmit;
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int count;
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struct tty_struct *tty = port->port.tty;
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if (port->x_char) {
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sdio_out(port, UART_TX, port->x_char);
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@ -453,7 +455,7 @@ static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
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port->x_char = 0;
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return;
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}
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if (circ_empty(xmit) || port->tty->stopped || port->tty->hw_stopped) {
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if (circ_empty(xmit) || tty->stopped || tty->hw_stopped) {
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sdio_uart_stop_tx(port);
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return;
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}
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@ -468,7 +470,7 @@ static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
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} while (--count > 0);
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if (circ_chars_pending(xmit) < WAKEUP_CHARS)
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tty_wakeup(port->tty);
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tty_wakeup(tty);
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if (circ_empty(xmit))
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sdio_uart_stop_tx(port);
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@ -477,6 +479,7 @@ static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
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static void sdio_uart_check_modem_status(struct sdio_uart_port *port)
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{
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int status;
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struct tty_struct *tty = port->port.tty;
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status = sdio_in(port, UART_MSR);
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@ -491,17 +494,17 @@ static void sdio_uart_check_modem_status(struct sdio_uart_port *port)
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port->icount.dcd++;
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if (status & UART_MSR_DCTS) {
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port->icount.cts++;
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if (port->tty->termios->c_cflag & CRTSCTS) {
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if (tty->termios->c_cflag & CRTSCTS) {
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int cts = (status & UART_MSR_CTS);
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if (port->tty->hw_stopped) {
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if (tty->hw_stopped) {
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if (cts) {
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port->tty->hw_stopped = 0;
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tty->hw_stopped = 0;
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sdio_uart_start_tx(port);
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tty_wakeup(port->tty);
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tty_wakeup(tty);
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}
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} else {
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if (!cts) {
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port->tty->hw_stopped = 1;
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tty->hw_stopped = 1;
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sdio_uart_stop_tx(port);
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}
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}
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@ -546,12 +549,13 @@ static int sdio_uart_startup(struct sdio_uart_port *port)
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{
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unsigned long page;
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int ret;
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struct tty_struct *tty = port->port.tty;
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/*
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* Set the TTY IO error marker - we will only clear this
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* once we have successfully opened the port.
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*/
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set_bit(TTY_IO_ERROR, &port->tty->flags);
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set_bit(TTY_IO_ERROR, &tty->flags);
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/* Initialise and allocate the transmit buffer. */
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page = __get_free_page(GFP_KERNEL);
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@ -595,14 +599,14 @@ static int sdio_uart_startup(struct sdio_uart_port *port)
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port->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
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port->mctrl = TIOCM_OUT2;
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sdio_uart_change_speed(port, port->tty->termios, NULL);
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sdio_uart_change_speed(port, tty->termios, NULL);
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if (port->tty->termios->c_cflag & CBAUD)
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if (tty->termios->c_cflag & CBAUD)
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sdio_uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR);
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if (port->tty->termios->c_cflag & CRTSCTS)
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if (tty->termios->c_cflag & CRTSCTS)
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if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS))
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port->tty->hw_stopped = 1;
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tty->hw_stopped = 1;
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clear_bit(TTY_IO_ERROR, &port->tty->flags);
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@ -634,7 +638,7 @@ static void sdio_uart_shutdown(struct sdio_uart_port *port)
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/* TODO: wait here for TX FIFO to drain */
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/* Turn off DTR and RTS early. */
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if (port->tty->termios->c_cflag & HUPCL)
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if (port->port.tty->termios->c_cflag & HUPCL)
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sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
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/* Disable interrupts from this port */
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@ -684,11 +688,11 @@ static int sdio_uart_open(struct tty_struct *tty, struct file *filp)
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if (!port->opened) {
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tty->driver_data = port;
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port->tty = tty;
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port->port.tty = tty;
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ret = sdio_uart_startup(port);
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if (ret) {
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tty->driver_data = NULL;
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port->tty = NULL;
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port->port.tty = NULL;
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mutex_unlock(&port->open_lock);
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sdio_uart_port_put(port);
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return ret;
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@ -723,7 +727,7 @@ static void sdio_uart_close(struct tty_struct *tty, struct file * filp)
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tty->closing = 1;
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sdio_uart_shutdown(port);
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tty_ldisc_flush(tty);
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port->tty = NULL;
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port->port.tty = NULL;
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tty->driver_data = NULL;
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tty->closing = 0;
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}
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@ -1068,6 +1072,7 @@ static int sdio_uart_probe(struct sdio_func *func,
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port->func = func;
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sdio_set_drvdata(func, port);
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tty_port_init(&port->port);
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ret = sdio_uart_add_port(port);
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if (ret) {
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