diff options
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/imx.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 231e7d5caf6c..66cc3d198dcf 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -361,6 +361,7 @@ static void imx_stop_tx(struct uart_port *port) imx_port_rts_inactive(sport, &temp); else imx_port_rts_active(sport, &temp); + temp |= UCR2_RXEN; writel(temp, port->membase + UCR2); temp = readl(port->membase + UCR4); @@ -568,6 +569,8 @@ static void imx_start_tx(struct uart_port *port) imx_port_rts_inactive(sport, &temp); else imx_port_rts_active(sport, &temp); + if (!(port->rs485.flags & SER_RS485_RX_DURING_TX)) + temp &= ~UCR2_RXEN; writel(temp, port->membase + UCR2); /* enable transmitter and shifter empty irq */ @@ -1610,19 +1613,17 @@ static int imx_rs485_config(struct uart_port *port, struct serial_rs485 *rs485conf) { struct imx_port *sport = (struct imx_port *)port; + unsigned long temp; /* unimplemented */ rs485conf->delay_rts_before_send = 0; rs485conf->delay_rts_after_send = 0; - rs485conf->flags |= SER_RS485_RX_DURING_TX; /* RTS is required to control the transmitter */ if (!sport->have_rtscts) rs485conf->flags &= ~SER_RS485_ENABLED; if (rs485conf->flags & SER_RS485_ENABLED) { - unsigned long temp; - /* disable transmitter */ temp = readl(sport->port.membase + UCR2); if (rs485conf->flags & SER_RS485_RTS_AFTER_SEND) @@ -1632,6 +1633,14 @@ static int imx_rs485_config(struct uart_port *port, writel(temp, sport->port.membase + UCR2); } + /* Make sure Rx is enabled in case Tx is active with Rx disabled */ + if (!(rs485conf->flags & SER_RS485_ENABLED) || + rs485conf->flags & SER_RS485_RX_DURING_TX) { + temp = readl(sport->port.membase + UCR2); + temp |= UCR2_RXEN; + writel(temp, sport->port.membase + UCR2); + } + port->rs485 = *rs485conf; return 0; |