diff options
| author | Sascha Hauer <sascha@saschahauer.de> | 2005-09-01 00:48:47 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-09-01 00:48:47 +0400 |
| commit | 0f302dc35412dc67035efc188b9d5c40711b4222 (patch) | |
| tree | 57cbbe8e722e6a82bfd8bb3b8227898c54615c72 /drivers/serial/imx.c | |
| parent | b129a8ccd53f74c43e4c83c8e0031a4990040830 (diff) | |
| download | linux-0f302dc35412dc67035efc188b9d5c40711b4222.tar.xz | |
[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 <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/serial/imx.c')
| -rw-r--r-- | drivers/serial/imx.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index 8861bcf84adf..4c985e6b3784 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; } /* |