Add driver for Belkin usb serial adapters.

Driver from Alexander Kabaev <kan.FreeBSD.org> and Ichiro FUKUHARA
<ichiro@ichiro.org>

2 files changed, 737 insertions, 1 deletions

diff --git a/sys/dev/usb/files.usb b/sys/dev/usb/files.usb
index 4481be0b487..e95b5efd221 100644
--- a/sys/dev/usb/files.usb
+++ b/sys/dev/usb/files.usb
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.usb,v 1.30 2002/11/30 19:09:59 nate Exp $
+#	$OpenBSD: files.usb,v 1.31 2002/11/30 19:29:29 nate Exp $
 #	$NetBSD: files.usb,v 1.16 2000/02/14 20:29:54 augustss Exp $
 #
 # Config file and device description for machine-independent USB code.
@@ -169,6 +169,11 @@ device	uvscom: ucombus
 attach	uvscom at uhub
 file	dev/usb/uvscom.c		uvscom
 
+# Belkin & other serial driver
+device	ubsa: ucombus
+attach	ubsa at uhub
+file	dev/usb/ubsa.c			ubsa
+
 
 # Scanners
 # Generic scanner support
diff --git a/sys/dev/usb/ubsa.c b/sys/dev/usb/ubsa.c
new file mode 100644
index 00000000000..a48a16e59f2
--- /dev/null
+++ b/sys/dev/usb/ubsa.c
@@ -0,0 +1,731 @@
+/*	$OpenBSD: ubsa.c,v 1.1 2002/11/30 19:29:29 nate Exp $ 	*/
+/*	$NetBSD: ubsa.c,v 1.3 2002/10/27 20:16:41 augustss Exp $	*/
+/*-
+ * Copyright (c) 2002, Alexander Kabaev <kan.FreeBSD.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+/*
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Ichiro FUKUHARA (ichiro@ichiro.org).
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#if defined(__OpenBSD__)
+#include <sys/device.h>
+#elif defined(__FreeBSD__)
+#include <sys/bus.h>
+#endif
+#include <sys/ioccom.h>
+#include <sys/fcntl.h>
+#include <sys/conf.h>
+#include <sys/tty.h>
+#include <sys/file.h>
+#if __FreeBSD_version >= 500014
+#include <sys/selinfo.h>
+#else
+#include <sys/select.h>
+#endif
+#include <sys/proc.h>
+#include <sys/vnode.h>
+#include <sys/poll.h>
+#include <sys/sysctl.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbcdc.h>
+
+#include <dev/usb/usbdi.h>
+#include <dev/usb/usbdi_util.h>
+#include <dev/usb/usbdevs.h>
+#include <dev/usb/usb_quirks.h>
+
+#include <dev/usb/ucomvar.h>
+
+#ifdef UBSA_DEBUG
+Static int	ubsadebug = 0;
+#ifdef __FreeBSD__
+SYSCTL_NODE(_hw_usb, OID_AUTO, ubsa, CTLFLAG_RW, 0, "USB ubsa");
+SYSCTL_INT(_hw_usb_ubsa, OID_AUTO, debug, CTLFLAG_RW,
+	   &ubsadebug, 0, "ubsa debug level");
+#endif
+
+#define	DPRINTFN(n, x)	do { \
+				if (ubsadebug > (n)) \
+					logprintf x; \
+			} while (0)
+#else
+#define	DPRINTFN(n, x)
+#endif
+#define	DPRINTF(x) DPRINTFN(0, x)
+
+#define	UBSA_MODVER		1	/* module version */
+
+#define	UBSA_CONFIG_INDEX	1
+#define	UBSA_IFACE_INDEX	0
+
+#define	UBSA_INTR_INTERVAL	100	/* ms */
+
+#define	UBSA_SET_BAUDRATE  	0x00
+#define	UBSA_SET_STOP_BITS	0x01
+#define	UBSA_SET_DATA_BITS	0x02
+#define	UBSA_SET_PARITY		0x03
+#define	UBSA_SET_DTR		0x0A
+#define	UBSA_SET_RTS		0x0B
+#define	UBSA_SET_BREAK		0x0C
+#define	UBSA_SET_FLOW_CTRL	0x10
+
+#define	UBSA_PARITY_NONE	0x00
+#define	UBSA_PARITY_EVEN	0x01
+#define	UBSA_PARITY_ODD		0x02
+#define	UBSA_PARITY_MARK	0x03
+#define	UBSA_PARITY_SPACE	0x04
+
+#define	UBSA_FLOW_NONE		0x0000
+#define	UBSA_FLOW_OCTS		0x0001
+#define	UBSA_FLOW_ODSR		0x0002
+#define	UBSA_FLOW_IDSR		0x0004
+#define	UBSA_FLOW_IDTR		0x0008
+#define	UBSA_FLOW_IRTS		0x0010
+#define	UBSA_FLOW_ORTS		0x0020
+#define	UBSA_FLOW_UNKNOWN	0x0040
+#define	UBSA_FLOW_OXON		0x0080
+#define	UBSA_FLOW_IXON		0x0100
+
+/* line status register */
+#define	UBSA_LSR_TSRE		0x40	/* Transmitter empty: byte sent */
+#define	UBSA_LSR_TXRDY		0x20	/* Transmitter buffer empty */
+#define	UBSA_LSR_BI		0x10	/* Break detected */
+#define	UBSA_LSR_FE		0x08	/* Framing error: bad stop bit */
+#define	UBSA_LSR_PE		0x04	/* Parity error */
+#define	UBSA_LSR_OE		0x02	/* Overrun, lost incoming byte */
+#define	UBSA_LSR_RXRDY		0x01	/* Byte ready in Receive Buffer */
+#define	UBSA_LSR_RCV_MASK	0x1f	/* Mask for incoming data or error */
+
+/* modem status register */
+/* All deltas are from the last read of the MSR. */
+#define	UBSA_MSR_DCD		0x80	/* Current Data Carrier Detect */
+#define	UBSA_MSR_RI		0x40	/* Current Ring Indicator */
+#define	UBSA_MSR_DSR		0x20	/* Current Data Set Ready */
+#define	UBSA_MSR_CTS		0x10	/* Current Clear to Send */
+#define	UBSA_MSR_DDCD		0x08	/* DCD has changed state */
+#define	UBSA_MSR_TERI		0x04	/* RI has toggled low to high */
+#define	UBSA_MSR_DDSR		0x02	/* DSR has changed state */
+#define	UBSA_MSR_DCTS		0x01	/* CTS has changed state */
+
+struct	ubsa_softc {
+	USBBASEDEVICE		sc_dev;		/* base device */
+	usbd_device_handle	sc_udev;	/* USB device */
+	usbd_interface_handle	sc_iface;	/* interface */
+
+	int			sc_iface_number;	/* interface number */
+
+	usbd_interface_handle	sc_intr_iface;	/* interrupt interface */
+	int			sc_intr_number;	/* interrupt number */
+	usbd_pipe_handle	sc_intr_pipe;	/* interrupt pipe */
+	u_char			*sc_intr_buf;	/* interrupt buffer */
+	int			sc_isize;
+
+	u_char			sc_dtr;		/* current DTR state */
+	u_char			sc_rts;		/* current RTS state */
+
+	u_char			sc_lsr;		/* Local status register */
+	u_char			sc_msr;		/* ubsa status register */
+
+	device_ptr_t		sc_subdev;	/* ucom device */
+
+	u_char			sc_dying;	/* disconnecting */
+
+};
+
+Static	void ubsa_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);
+
+Static	void ubsa_get_status(void *, int, u_char *, u_char *);
+Static	void ubsa_set(void *, int, int, int);
+Static	int  ubsa_param(void *, int, struct termios *);
+Static	int  ubsa_open(void *, int);
+Static	void ubsa_close(void *, int);
+
+Static  void ubsa_break(struct ubsa_softc *sc, int onoff);
+Static	int  ubsa_request(struct ubsa_softc *, u_int8_t, u_int16_t);
+Static	void ubsa_dtr(struct ubsa_softc *, int);
+Static	void ubsa_rts(struct ubsa_softc *, int);
+Static	void ubsa_baudrate(struct ubsa_softc *, speed_t);
+Static	void ubsa_parity(struct ubsa_softc *, tcflag_t);
+Static	void ubsa_databits(struct ubsa_softc *, tcflag_t);
+Static	void ubsa_stopbits(struct ubsa_softc *, tcflag_t);
+Static	void ubsa_flow(struct ubsa_softc *, tcflag_t, tcflag_t);
+
+struct	ucom_methods ubsa_methods = {
+	ubsa_get_status,
+	ubsa_set,
+	ubsa_param,
+	NULL,
+	ubsa_open,
+	ubsa_close,
+	NULL,
+	NULL
+};
+
+Static const struct usb_devno ubsa_devs[] = {
+	/* BELKIN F5U103 */
+	{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U103 },
+	/* BELKIN F5U120 */
+	{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U120 },
+	/* GoHubs GO-COM232 */
+	{ USB_VENDOR_ETEK, USB_PRODUCT_ETEK_1COM },
+	/* GoHubs GO-COM232 */
+	{ USB_VENDOR_GOHUBS, USB_PRODUCT_GOHUBS_GOCOM232 },
+	/* Peracom */
+	{ USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_SERIAL1 },
+};
+#define ubsa_lookup(v, p) usb_lookup(ubsa_devs, v, p)
+
+USB_DECLARE_DRIVER(ubsa);
+
+USB_MATCH(ubsa)
+{
+	USB_MATCH_START(ubsa, uaa);
+
+	if (uaa->iface != NULL)
+		return (UMATCH_NONE);
+
+	return (ubsa_lookup(uaa->vendor, uaa->product) != NULL ?
+		UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
+}
+
+USB_ATTACH(ubsa)
+{
+	USB_ATTACH_START(ubsa, sc, uaa);
+	usbd_device_handle dev = uaa->device;
+	usb_config_descriptor_t *cdesc;
+	usb_interface_descriptor_t *id;
+	usb_endpoint_descriptor_t *ed;
+	char devinfo[1024];
+	const char *devname = USBDEVNAME(sc->sc_dev);
+	usbd_status err;
+	struct ucom_attach_args uca;
+	int i;
+
+        usbd_devinfo(dev, 0, devinfo);
+        USB_ATTACH_SETUP;
+        printf("%s: %s\n", devname, devinfo);
+
+        sc->sc_udev = dev;
+
+	/*
+	 * initialize rts, dtr variables to something
+	 * different from boolean 0, 1
+	 */
+	sc->sc_dtr = -1;
+	sc->sc_rts = -1;
+
+	printf("%s: %s\n", devname, devinfo);
+
+	DPRINTF(("ubsa attach: sc = %p\n", sc));
+
+	/* initialize endpoints */
+	uca.bulkin = uca.bulkout = -1;
+	sc->sc_intr_number = -1;
+	sc->sc_intr_pipe = NULL;
+
+	/* Move the device into the configured state. */
+	err = usbd_set_config_index(dev, UBSA_CONFIG_INDEX, 1);
+	if (err) {
+		printf("%s: failed to set configuration: %s\n",
+		    devname, usbd_errstr(err));
+		sc->sc_dying = 1;
+		goto error;
+	}
+
+	/* get the config descriptor */
+	cdesc = usbd_get_config_descriptor(sc->sc_udev);
+
+	if (cdesc == NULL) {
+		printf("%s: failed to get configuration descriptor\n",
+		    devname);
+		sc->sc_dying = 1;
+		goto error;
+	}
+
+	/* get the first interface */
+	err = usbd_device2interface_handle(dev, UBSA_IFACE_INDEX,
+	    &sc->sc_iface);
+	if (err) {
+		printf("%s: failed to get interface: %s\n",
+			devname, usbd_errstr(err));
+		sc->sc_dying = 1;
+		goto error;
+	}
+
+	/* Find the endpoints */
+
+	id = usbd_get_interface_descriptor(sc->sc_iface);
+	sc->sc_iface_number = id->bInterfaceNumber;
+
+	for (i = 0; i < id->bNumEndpoints; i++) {
+		ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
+		if (ed == NULL) {
+			printf("%s: no endpoint descriptor for %d\n",
+			    USBDEVNAME(sc->sc_dev), i);
+			sc->sc_dying = 1;
+			goto error;
+		}
+
+		if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
+		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
+			sc->sc_intr_number = ed->bEndpointAddress;
+			sc->sc_isize = UGETW(ed->wMaxPacketSize);
+		} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
+		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
+			uca.bulkin = ed->bEndpointAddress;
+			uca.ibufsize = UGETW(ed->wMaxPacketSize);
+		} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
+		    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
+			uca.bulkout = ed->bEndpointAddress;
+			uca.obufsize = UGETW(ed->wMaxPacketSize);
+		}
+	}
+
+	if (sc->sc_intr_number == -1) {
+		printf("%s: Could not find interrupt in\n", devname);
+		sc->sc_dying = 1;
+		goto error;
+	}
+
+	if (uca.bulkin == -1) {
+		printf("%s: Could not find data bulk in\n", devname);
+		sc->sc_dying = 1;
+		goto error;
+	}
+
+	if (uca.bulkout == -1) {
+		printf("%s: Could not find data bulk out\n", devname);
+		sc->sc_dying = 1;
+		goto error;
+	}
+
+	uca.portno = UCOM_UNK_PORTNO;
+	/* bulkin, bulkout set above */
+	uca.ibufsizepad = uca.ibufsize;
+	uca.opkthdrlen = 0;
+	uca.device = dev;
+	uca.iface = sc->sc_iface;
+	uca.methods = &ubsa_methods;
+	uca.arg = sc;
+	uca.info = NULL;
+
+	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
+			   USBDEV(sc->sc_dev));
+
+	DPRINTF(("ubsa: in = 0x%x, out = 0x%x, intr = 0x%x\n",
+	    uca.bulkin_no, uca.bulkout_no, sc->sc_intr_number));
+
+	sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);
+
+	USB_ATTACH_SUCCESS_RETURN;
+
+error:
+	free(devinfo, M_USBDEV);
+	USB_ATTACH_ERROR_RETURN;
+}
+
+USB_DETACH(ubsa)
+{
+	USB_DETACH_START(ubsa, sc);
+	int rv;
+
+
+	DPRINTF(("ubsa_detach: sc = %p\n", sc));
+
+	if (sc->sc_intr_pipe != NULL) {
+		usbd_abort_pipe(sc->sc_intr_pipe);
+		usbd_close_pipe(sc->sc_intr_pipe);
+		free(sc->sc_intr_buf, M_USBDEV);
+		sc->sc_intr_pipe = NULL;
+	}
+
+	sc->sc_dying = 1;
+	if (sc->sc_subdev != NULL) {
+		rv = config_detach(sc->sc_subdev, flags);
+		sc->sc_subdev = NULL;
+	}
+
+	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
+			   USBDEV(sc->sc_dev));
+
+	return (rv);
+}
+
+int
+ubsa_activate(device_ptr_t self, enum devact act)
+{
+	struct ubsa_softc *sc = (struct ubsa_softc *)self;
+	int rv = 0;
+
+	switch (act) {
+	case DVACT_ACTIVATE:
+		return (EOPNOTSUPP);
+
+	case DVACT_DEACTIVATE:
+		if (sc->sc_subdev != NULL)
+			rv = config_deactivate(sc->sc_subdev);
+		sc->sc_dying = 1;
+		break;
+	}
+	return (rv);
+}
+
+Static int
+ubsa_request(struct ubsa_softc *sc, u_int8_t request, u_int16_t value)
+{
+	usb_device_request_t req;
+	usbd_status err;
+
+	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
+	req.bRequest = request;
+	USETW(req.wValue, value);
+	USETW(req.wIndex, sc->sc_iface_number);
+	USETW(req.wLength, 0);
+
+	err = usbd_do_request(sc->sc_udev, &req, 0);
+	if (err)
+		printf("%s: ubsa_request: %s\n",
+		    USBDEVNAME(sc->sc_dev), usbd_errstr(err));
+	return (err);
+}
+
+Static void
+ubsa_dtr(struct ubsa_softc *sc, int onoff)
+{
+
+	DPRINTF(("ubsa_dtr: onoff = %d\n", onoff));
+
+	if (sc->sc_dtr == onoff)
+		return;
+	sc->sc_dtr = onoff;
+
+	ubsa_request(sc, UBSA_SET_DTR, onoff ? 1 : 0);
+}
+
+Static void
+ubsa_rts(struct ubsa_softc *sc, int onoff)
+{
+
+	DPRINTF(("ubsa_rts: onoff = %d\n", onoff));
+
+	if (sc->sc_rts == onoff)
+		return;
+	sc->sc_rts = onoff;
+
+	ubsa_request(sc, UBSA_SET_RTS, onoff ? 1 : 0);
+}
+
+Static void
+ubsa_break(struct ubsa_softc *sc, int onoff)
+{
+
+	DPRINTF(("ubsa_rts: onoff = %d\n", onoff));
+
+	ubsa_request(sc, UBSA_SET_BREAK, onoff ? 1 : 0);
+}
+
+Static void
+ubsa_set(void *addr, int portno, int reg, int onoff)
+{
+	struct ubsa_softc *sc;
+
+	sc = addr;
+	switch (reg) {
+	case UCOM_SET_DTR:
+		ubsa_dtr(sc, onoff);
+		break;
+	case UCOM_SET_RTS:
+		ubsa_rts(sc, onoff);
+		break;
+	case UCOM_SET_BREAK:
+		ubsa_break(sc, onoff);
+		break;
+	default:
+		break;
+	}
+}
+
+Static void
+ubsa_baudrate(struct ubsa_softc *sc, speed_t speed)
+{
+	u_int16_t value = 0;
+
+	DPRINTF(("ubsa_baudrate: speed = %d\n", speed));
+
+	switch(speed) {
+	case B0:
+		break;
+	case B300:
+	case B600:
+	case B1200:
+	case B2400:
+	case B4800:
+	case B9600:
+	case B19200:
+	case B38400:
+	case B57600:
+	case B115200:
+	case B230400:
+		value = B230400 / speed;
+		break;
+	default:
+		printf("%s: ubsa_param: unsupported baudrate, "
+		    "forcing default of 9600\n",
+		    USBDEVNAME(sc->sc_dev));
+		value = B230400 / B9600;
+		break;
+	};
+
+	if (speed == B0) {
+		ubsa_flow(sc, 0, 0);
+		ubsa_dtr(sc, 0);
+		ubsa_rts(sc, 0);
+	} else
+		ubsa_request(sc, UBSA_SET_BAUDRATE, value);
+}
+
+Static void
+ubsa_parity(struct ubsa_softc *sc, tcflag_t cflag)
+{
+	int value;
+
+	DPRINTF(("ubsa_parity: cflag = 0x%x\n", cflag));
+
+	if (cflag & PARENB)
+		value = (cflag & PARODD) ? UBSA_PARITY_ODD : UBSA_PARITY_EVEN;
+	else
+		value = UBSA_PARITY_NONE;
+
+	ubsa_request(sc, UBSA_SET_PARITY, value);
+}
+
+Static void
+ubsa_databits(struct ubsa_softc *sc, tcflag_t cflag)
+{
+	int value;
+
+	DPRINTF(("ubsa_databits: cflag = 0x%x\n", cflag));
+
+	switch (cflag & CSIZE) {
+	case CS5: value = 0; break;
+	case CS6: value = 1; break;
+	case CS7: value = 2; break;
+	case CS8: value = 3; break;
+	default:
+		printf("%s: ubsa_param: unsupported databits requested, "
+		    "forcing default of 8\n",
+		    USBDEVNAME(sc->sc_dev));
+		value = 3;
+	}
+
+	ubsa_request(sc, UBSA_SET_DATA_BITS, value);
+}
+
+Static void
+ubsa_stopbits(struct ubsa_softc *sc, tcflag_t cflag)
+{
+	int value;
+
+	DPRINTF(("ubsa_stopbits: cflag = 0x%x\n", cflag));
+
+	value = (cflag & CSTOPB) ? 1 : 0;
+
+	ubsa_request(sc, UBSA_SET_STOP_BITS, value);
+}
+
+Static void
+ubsa_flow(struct ubsa_softc *sc, tcflag_t cflag, tcflag_t iflag)
+{
+	int value;
+
+	DPRINTF(("ubsa_flow: cflag = 0x%x, iflag = 0x%x\n", cflag, iflag));
+
+	value = 0;
+	if (cflag & CRTSCTS)
+		value |= UBSA_FLOW_OCTS | UBSA_FLOW_IRTS;
+	if (iflag & (IXON|IXOFF))
+		value |= UBSA_FLOW_OXON | UBSA_FLOW_IXON;
+
+	ubsa_request(sc, UBSA_SET_FLOW_CTRL, value);
+}
+
+Static int
+ubsa_param(void *addr, int portno, struct termios *ti)
+{
+	struct ubsa_softc *sc = addr;
+
+	DPRINTF(("ubsa_param: sc = %p\n", sc));
+
+	ubsa_baudrate(sc, ti->c_ospeed);
+	ubsa_parity(sc, ti->c_cflag);
+	ubsa_databits(sc, ti->c_cflag);
+	ubsa_stopbits(sc, ti->c_cflag);
+	ubsa_flow(sc, ti->c_cflag, ti->c_iflag);
+
+	return (0);
+}
+
+Static int
+ubsa_open(void *addr, int portno)
+{
+	struct ubsa_softc *sc = addr;
+	int err;
+
+	if (sc->sc_dying)
+		return (ENXIO);
+
+	DPRINTF(("ubsa_open: sc = %p\n", sc));
+
+	if (sc->sc_intr_number != -1 && sc->sc_intr_pipe == NULL) {
+		sc->sc_intr_buf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK);
+		err = usbd_open_pipe_intr(sc->sc_intr_iface,
+		    sc->sc_intr_number,
+		    USBD_SHORT_XFER_OK,
+		    &sc->sc_intr_pipe,
+		    sc,
+		    sc->sc_intr_buf,
+		    sc->sc_isize,
+		    ubsa_intr,
+		    UBSA_INTR_INTERVAL);
+		if (err) {
+			printf("%s: cannot open interrupt pipe (addr %d)\n",
+			    USBDEVNAME(sc->sc_dev),
+			    sc->sc_intr_number);
+			return (EIO);
+		}
+	}
+
+	return (0);
+}
+
+Static void
+ubsa_close(void *addr, int portno)
+{
+	struct ubsa_softc *sc = addr;
+	int err;
+
+	if (sc->sc_dying)
+		return;
+
+	DPRINTF(("ubsa_close: close\n"));
+
+	if (sc->sc_intr_pipe != NULL) {
+		err = usbd_abort_pipe(sc->sc_intr_pipe);
+		if (err)
+			printf("%s: abort interrupt pipe failed: %s\n",
+			    USBDEVNAME(sc->sc_dev),
+			    usbd_errstr(err));
+		err = usbd_close_pipe(sc->sc_intr_pipe);
+		if (err)
+			printf("%s: close interrupt pipe failed: %s\n",
+			    USBDEVNAME(sc->sc_dev),
+			    usbd_errstr(err));
+		free(sc->sc_intr_buf, M_USBDEV);
+		sc->sc_intr_pipe = NULL;
+	}
+}
+
+Static void
+ubsa_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
+{
+	struct ubsa_softc *sc = priv;
+	u_char *buf;
+
+	buf = sc->sc_intr_buf;
+	if (sc->sc_dying)
+		return;
+
+	if (status != USBD_NORMAL_COMPLETION) {
+		if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
+			return;
+
+		DPRINTF(("%s: ubsa_intr: abnormal status: %s\n",
+		    USBDEVNAME(sc->sc_ucom.sc_dev),
+		    usbd_errstr(status)));
+		usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
+		return;
+	}
+
+	/* incidentally, Belkin adapter status bits match UART 16550 bits */
+	sc->sc_lsr = buf[2];
+	sc->sc_msr = buf[3];
+
+	DPRINTF(("%s: ubsa lsr = 0x%02x, msr = 0x%02x\n",
+	    USBDEVNAME(sc->sc_ucom.sc_dev), sc->sc_lsr, sc->sc_msr));
+
+	ucom_status_change((struct ucom_softc *)sc->sc_subdev);
+}
+
+Static void
+ubsa_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
+{
+	struct ubsa_softc *sc = addr;
+
+	DPRINTF(("ubsa_get_status\n"));
+
+	if (lsr != NULL)
+		*lsr = sc->sc_lsr;
+	if (msr != NULL)
+		*msr = sc->sc_msr;
+}