From 0f302dc35412dc67035efc188b9d5c40711b4222 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Wed, 31 Aug 2005 21:48:47 +0100 Subject: [ARM] 2866/1: add i.MX set_mctrl / get_mctrl functions Patch from Sascha Hauer This patch adds support for setting and getting RTS / CTS via set_mtctrl / get_mctrl functions. Signed-off-by: Sascha Hauer Signed-off-by: Russell King --- drivers/serial/imx.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'drivers/serial/imx.c') diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 8861bcf..4c985e6 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -291,13 +291,31 @@ static unsigned int imx_tx_empty(struct uart_port *port) return USR2((u32)sport->port.membase) & USR2_TXDC ? TIOCSER_TEMT : 0; } +/* + * We have a modem side uart, so the meanings of RTS and CTS are inverted. + */ static unsigned int imx_get_mctrl(struct uart_port *port) { - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; + struct imx_port *sport = (struct imx_port *)port; + unsigned int tmp = TIOCM_DSR | TIOCM_CAR; + + if (USR1((u32)sport->port.membase) & USR1_RTSS) + tmp |= TIOCM_CTS; + + if (UCR2((u32)sport->port.membase) & UCR2_CTS) + tmp |= TIOCM_RTS; + + return tmp; } static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) { + struct imx_port *sport = (struct imx_port *)port; + + if (mctrl & TIOCM_RTS) + UCR2((u32)sport->port.membase) |= UCR2_CTS; + else + UCR2((u32)sport->port.membase) &= ~UCR2_CTS; } /* -- cgit v1.1