Update from NetBSD. Log message:

Add code to setup hardware or software flow control (or none at
all, if necessary) depending on the user-specified termios flags.

This allows the device to talk to DCEs which don't assert RTS
(i.e. dumb, 3-wire serial ports).

1 files changed, 21 insertions, 3 deletions

diff --git a/sys/dev/usb/uftdi.c b/sys/dev/usb/uftdi.c
index f02d9ec0f20..027e63ac443 100644
--- a/sys/dev/usb/uftdi.c
+++ b/sys/dev/usb/uftdi.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: uftdi.c,v 1.8 2002/07/25 02:18:10 nate Exp $ 	*/
-/*	$NetBSD: uftdi.c,v 1.10 2002/05/08 18:10:19 scw Exp $	*/
+/*	$OpenBSD: uftdi.c,v 1.9 2002/07/29 03:01:48 nate Exp $ 	*/
+/*	$NetBSD: uftdi.c,v 1.12 2002/07/18 14:44:10 scw Exp $	*/
 
 /*
  * Copyright (c) 2000 The NetBSD Foundation, Inc.
@@ -425,7 +425,7 @@ uftdi_param(void *vsc, int portno, struct termios *t)
 	struct uftdi_softc *sc = vsc;
 	usb_device_request_t req;
 	usbd_status err;
-	int rate, data;
+	int rate, data, flow;
 
 	DPRINTF(("uftdi_param: sc=%p\n", sc));
 
@@ -521,6 +521,24 @@ uftdi_param(void *vsc, int portno, struct termios *t)
 	if (err)
 		return (EIO);
 
+	if (ISSET(t->c_cflag, CRTSCTS)) {
+		flow = FTDI_SIO_RTS_CTS_HS;
+		USETW(req.wValue, 0);
+	} else if (ISSET(t->c_iflag, IXON|IXOFF)) {
+		flow = FTDI_SIO_XON_XOFF_HS;
+		USETW2(req.wValue, t->c_cc[VSTOP], t->c_cc[VSTART]);
+	} else {
+		flow = FTDI_SIO_DISABLE_FLOW_CTRL;
+		USETW(req.wValue, 0);
+	}
+	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
+	req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
+	USETW2(req.wIndex, flow, portno);
+	USETW(req.wLength, 0);
+	err = usbd_do_request(sc->sc_udev, &req, NULL);
+	if (err)
+		return (EIO);
+
 	return (0);
 }