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authorGabriel Somlo <gsomlo@gmail.com>2022-11-23 16:04:57 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-01-19 16:59:40 +0300
commit7121d86effddc28dc21fec38d59923ea12d5a873 (patch)
tree26513202bb3d212afb3993b2bc8582864f14023f /drivers/tty/serial/liteuart.c
parent5dcceabe8e2a72845e3cf7c73ab2302bf5deb69a (diff)
downloadlinux-7121d86effddc28dc21fec38d59923ea12d5a873.tar.xz
serial: liteuart: move function definitions
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@gmail.com> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Jiri Slaby <jirislaby@kernel.org> Link: https://lore.kernel.org/r/20221123130500.1030189-12-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/liteuart.c')
-rw-r--r--drivers/tty/serial/liteuart.c82
1 files changed, 41 insertions, 41 deletions
diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index ab6837f3e40d..0b9d96e5efcf 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -68,6 +68,47 @@ static struct uart_driver liteuart_driver = {
#endif
};
+static void liteuart_putchar(struct uart_port *port, unsigned char ch)
+{
+ while (litex_read8(port->membase + OFF_TXFULL))
+ cpu_relax();
+
+ litex_write8(port->membase + OFF_RXTX, ch);
+}
+
+static void liteuart_stop_tx(struct uart_port *port)
+{
+}
+
+static void liteuart_start_tx(struct uart_port *port)
+{
+ struct circ_buf *xmit = &port->state->xmit;
+ unsigned char ch;
+
+ if (unlikely(port->x_char)) {
+ litex_write8(port->membase + OFF_RXTX, port->x_char);
+ port->icount.tx++;
+ port->x_char = 0;
+ } else if (!uart_circ_empty(xmit)) {
+ while (xmit->head != xmit->tail) {
+ ch = xmit->buf[xmit->tail];
+ uart_xmit_advance(port, 1);
+ liteuart_putchar(port, ch);
+ }
+ }
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(port);
+}
+
+static void liteuart_stop_rx(struct uart_port *port)
+{
+ struct liteuart_port *uart = to_liteuart_port(port);
+
+ /* just delete timer */
+ del_timer(&uart->timer);
+}
+
static void liteuart_rx_chars(struct uart_port *port)
{
unsigned char __iomem *membase = port->membase;
@@ -98,14 +139,6 @@ static void liteuart_timer(struct timer_list *t)
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))
- cpu_relax();
-
- 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 */
@@ -125,39 +158,6 @@ 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)
-{
-}
-
-static void liteuart_start_tx(struct uart_port *port)
-{
- struct circ_buf *xmit = &port->state->xmit;
- unsigned char ch;
-
- if (unlikely(port->x_char)) {
- litex_write8(port->membase + OFF_RXTX, port->x_char);
- port->icount.tx++;
- port->x_char = 0;
- } else if (!uart_circ_empty(xmit)) {
- while (xmit->head != xmit->tail) {
- ch = xmit->buf[xmit->tail];
- uart_xmit_advance(port, 1);
- liteuart_putchar(port, ch);
- }
- }
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
-}
-
-static void liteuart_stop_rx(struct uart_port *port)
-{
- struct liteuart_port *uart = to_liteuart_port(port);
-
- /* just delete timer */
- del_timer(&uart->timer);
-}
-
static int liteuart_startup(struct uart_port *port)
{
struct liteuart_port *uart = to_liteuart_port(port);