On Sat, 12 Nov 2022, Gabriel Somlo wrote:
> Move definitions for liteuart_[stop|start]_tx(), liteuart_stop_rx(),
> and liteuart_putchar() to a more convenient location in preparation
> for adding IRQ support. This patch contains no functional changes.
>
> Signed-off-by: Gabriel Somlo <gsomlo@xxxxxxxxx>
> ---
> drivers/tty/serial/liteuart.c | 98 +++++++++++++++++------------------
> 1 file changed, 49 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
> index 172ac190ba2f..cf1ce597b45e 100644
> --- a/drivers/tty/serial/liteuart.c
> +++ b/drivers/tty/serial/liteuart.c
> @@ -67,36 +67,6 @@ static struct uart_driver liteuart_driver = {
> #endif
> };
>
> -static void liteuart_rx_chars(struct uart_port *port)
> -{
> - unsigned char __iomem *membase = port->membase;
> - unsigned int status, ch;
> -
> - while ((status = !litex_read8(membase + OFF_RXEMPTY)) == 1) {
> - ch = litex_read8(membase + OFF_RXTX);
> - port->icount.rx++;
> -
> - /* necessary for RXEMPTY to refresh its value */
> - litex_write8(membase + OFF_EV_PENDING, EV_RX);
> -
> - /* no overflow bits in status */
> - if (!(uart_handle_sysrq_char(port, ch)))
> - uart_insert_char(port, status, 0, ch, TTY_NORMAL);
> - }
> -
> - tty_flip_buffer_push(&port->state->port);
> -}
> -
> -static void liteuart_timer(struct timer_list *t)
> -{
> - struct liteuart_port *uart = from_timer(uart, t, timer);
> - struct uart_port *port = &uart->port;
> -
> - liteuart_rx_chars(port);
> -
> - mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
> -}
> -
> static void liteuart_putchar(struct uart_port *port, unsigned char ch)
> {
> while (litex_read8(port->membase + OFF_TXFULL))
> @@ -105,25 +75,6 @@ static void liteuart_putchar(struct uart_port *port, unsigned char ch)
> litex_write8(port->membase + OFF_RXTX, ch);
> }
>
> -static unsigned int liteuart_tx_empty(struct uart_port *port)
> -{
> - /* not really tx empty, just checking if tx is not full */
> - if (!litex_read8(port->membase + OFF_TXFULL))
> - return TIOCSER_TEMT;
> -
> - return 0;
> -}
> -
> -static void liteuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
> -{
> - /* modem control register is not present in LiteUART */
> -}
> -
> -static unsigned int liteuart_get_mctrl(struct uart_port *port)
> -{
> - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
> -}
> -
> static void liteuart_stop_tx(struct uart_port *port)
> {
> /* not used in LiteUART, but called unconditionally from serial_core */
> @@ -159,6 +110,55 @@ static void liteuart_stop_rx(struct uart_port *port)
> del_timer(&uart->timer);
> }
>
> +static void liteuart_rx_chars(struct uart_port *port)
> +{
> + unsigned char __iomem *membase = port->membase;
> + unsigned int status, ch;
> +
> + while ((status = !litex_read8(membase + OFF_RXEMPTY)) == 1) {
> + ch = litex_read8(membase + OFF_RXTX);
> + port->icount.rx++;
> +
> + /* necessary for RXEMPTY to refresh its value */
> + litex_write8(membase + OFF_EV_PENDING, EV_RX);
> +
> + /* no overflow bits in status */
> + if (!(uart_handle_sysrq_char(port, ch)))
> + uart_insert_char(port, status, 0, ch, TTY_NORMAL);
> + }
> +
> + tty_flip_buffer_push(&port->state->port);
> +}
> +
> +static void liteuart_timer(struct timer_list *t)
> +{
> + struct liteuart_port *uart = from_timer(uart, t, timer);
> + struct uart_port *port = &uart->port;
> +
> + liteuart_rx_chars(port);
> +
> + mod_timer(&uart->timer, jiffies + uart_poll_timeout(port));
> +}
> +
> +static unsigned int liteuart_tx_empty(struct uart_port *port)
> +{
> + /* not really tx empty, just checking if tx is not full */
> + if (!litex_read8(port->membase + OFF_TXFULL))
> + return TIOCSER_TEMT;
> +
> + return 0;
> +}
> +
> +static void liteuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
> +{
> + /* modem control register is not present in LiteUART */
> +}
> +
> +static unsigned int liteuart_get_mctrl(struct uart_port *port)
> +{
> + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
> +}
> +
> static int liteuart_startup(struct uart_port *port)
> {
> struct liteuart_port *uart = to_liteuart_port(port);
>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
--
i.
