diff options
Diffstat (limited to 'drivers/tty/serial/mxs-auart.c')
| -rw-r--r-- | drivers/tty/serial/mxs-auart.c | 32 |
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) |