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path: root/drivers/tty/serial/mxs-auart.c
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Diffstat (limited to 'drivers/tty/serial/mxs-auart.c')
-rw-r--r--drivers/tty/serial/mxs-auart.c32
1 files changed, 8 insertions, 24 deletions
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index d21a4f3ef2fe..ef6e7bb6105c 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -569,6 +569,8 @@ static int mxs_auart_dma_tx(struct mxs_auart_port *s, int size)
static void mxs_auart_tx_chars(struct mxs_auart_port *s)
{
struct circ_buf *xmit = &s->port.state->xmit;
+ bool pending;
+ u8 ch;
if (auart_dma_enabled(s)) {
u32 i = 0;
@@ -603,31 +605,13 @@ static void mxs_auart_tx_chars(struct mxs_auart_port *s)
return;
}
-
- while (!(mxs_read(s, REG_STAT) & AUART_STAT_TXFF)) {
- if (s->port.x_char) {
- s->port.icount.tx++;
- mxs_write(s->port.x_char, s, REG_DATA);
- s->port.x_char = 0;
- continue;
- }
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(&s->port)) {
- s->port.icount.tx++;
- mxs_write(xmit->buf[xmit->tail], s, REG_DATA);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- } else
- break;
- }
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&s->port);
-
- if (uart_circ_empty(&(s->port.state->xmit)))
- mxs_clr(AUART_INTR_TXIEN, s, REG_INTR);
- else
+ pending = uart_port_tx(&s->port, ch,
+ !(mxs_read(s, REG_STAT) & AUART_STAT_TXFF),
+ mxs_write(ch, s, REG_DATA));
+ if (pending)
mxs_set(AUART_INTR_TXIEN, s, REG_INTR);
-
- if (uart_tx_stopped(&s->port))
- mxs_auart_stop_tx(&s->port);
+ else
+ mxs_clr(AUART_INTR_TXIEN, s, REG_INTR);
}
static void mxs_auart_rx_char(struct mxs_auart_port *s)