/*      $OpenBSD: ubsa.c,v 1.71 2024/09/20 02:00:46 jsg Exp $   */
/*      $NetBSD: ubsa.c,v 1.5 2002/11/25 00:51:33 fvdl 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.
 *
 * 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/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/tty.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/ucomvar.h>

#ifdef UBSA_DEBUG
int     ubsadebug = 0;

#define DPRINTFN(n, x)  do { if (ubsadebug > (n)) printf 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 {
        struct device            sc_dev;        /* base device */
        struct usbd_device      *sc_udev;       /* USB device */
        struct usbd_interface   *sc_iface;      /* interface */

        int                      sc_iface_number;       /* interface number */

        int                      sc_intr_number;        /* interrupt number */
        struct usbd_pipe        *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 */

        struct device           *sc_subdev;     /* ucom device */

};

void ubsa_intr(struct usbd_xfer *, void *, usbd_status);

void ubsa_get_status(void *, int, u_char *, u_char *);
void ubsa_set(void *, int, int, int);
int  ubsa_param(void *, int, struct termios *);
int  ubsa_open(void *, int);
void ubsa_close(void *, int);

void ubsa_break(struct ubsa_softc *sc, int onoff);
int  ubsa_request(struct ubsa_softc *, u_int8_t, u_int16_t);
void ubsa_dtr(struct ubsa_softc *, int);
void ubsa_rts(struct ubsa_softc *, int);
void ubsa_baudrate(struct ubsa_softc *, speed_t);
void ubsa_parity(struct ubsa_softc *, tcflag_t);
void ubsa_databits(struct ubsa_softc *, tcflag_t);
void ubsa_stopbits(struct ubsa_softc *, tcflag_t);
void ubsa_flow(struct ubsa_softc *, tcflag_t, tcflag_t);

const struct ucom_methods ubsa_methods = {
        ubsa_get_status,
        ubsa_set,
        ubsa_param,
        NULL,
        ubsa_open,
        ubsa_close,
        NULL,
        NULL
};

const struct usb_devno ubsa_devs[] = {
        /* Axesstel MV100H */
        { USB_VENDOR_AXESSTEL, USB_PRODUCT_AXESSTEL_DATAMODEM },
        /* BELKIN F5U103 */
        { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U103 },
        /* BELKIN F5U120 */
        { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U120 },
        /* GoHubs GO-COM232 , Belkin F5U003 */
        { 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 },
        /* ZTE Inc. CMDMA MSM modem */
        { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_CDMA_MSM },
        /* ZTE Inc. AC8700 */
        { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_AC8700 },
};

int ubsa_match(struct device *, void *, void *);
void ubsa_attach(struct device *, struct device *, void *);
int ubsa_detach(struct device *, int);

struct cfdriver ubsa_cd = {
        NULL, "ubsa", DV_DULL
};

const struct cfattach ubsa_ca = {
        sizeof(struct ubsa_softc), ubsa_match, ubsa_attach, ubsa_detach
};

int
ubsa_match(struct device *parent, void *match, void *aux)
{
        struct usb_attach_arg *uaa = aux;

        if (uaa->iface != NULL)
                return (UMATCH_NONE);

        return (usb_lookup(ubsa_devs, uaa->vendor, uaa->product) != NULL ?
            UMATCH_VENDOR_PRODUCT : UMATCH_NONE);
}

void
ubsa_attach(struct device *parent, struct device *self, void *aux)
{
        struct ubsa_softc *sc = (struct ubsa_softc *)self;
        struct usb_attach_arg *uaa = aux;
        struct usbd_device *dev = uaa->device;
        usb_config_descriptor_t *cdesc;
        usb_interface_descriptor_t *id;
        usb_endpoint_descriptor_t *ed;
        const char *devname = sc->sc_dev.dv_xname;
        usbd_status err;
        struct ucom_attach_args uca;
        int i;

        sc->sc_udev = dev;

        /*
         * initialize rts, dtr variables to something
         * different from boolean 0, 1
         */
        sc->sc_dtr = -1;
        sc->sc_rts = -1;

        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));
                usbd_deactivate(sc->sc_udev);
                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);
                usbd_deactivate(sc->sc_udev);
                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));
                usbd_deactivate(sc->sc_udev);
                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",
                            sc->sc_dev.dv_xname, i);
                        usbd_deactivate(sc->sc_udev);
                        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);
                usbd_deactivate(sc->sc_udev);
                goto error;
        }

        if (uca.bulkin == -1) {
                printf("%s: Could not find data bulk in\n", devname);
                usbd_deactivate(sc->sc_udev);
                goto error;
        }

        if (uca.bulkout == -1) {
                printf("%s: Could not find data bulk out\n", devname);
                usbd_deactivate(sc->sc_udev);
                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;

        DPRINTF(("ubsa: in = 0x%x, out = 0x%x, intr = 0x%x\n",
            uca.bulkin, uca.bulkout, sc->sc_intr_number));

        sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);

error:
        return;
}

int
ubsa_detach(struct device *self, int flags)
{
        struct ubsa_softc *sc = (struct ubsa_softc *)self;
        int rv = 0;


        DPRINTF(("ubsa_detach: sc = %p\n", sc));

        if (sc->sc_intr_pipe != NULL) {
                usbd_close_pipe(sc->sc_intr_pipe);
                free(sc->sc_intr_buf, M_USBDEV, sc->sc_isize);
                sc->sc_intr_pipe = NULL;
        }

        if (sc->sc_subdev != NULL) {
                rv = config_detach(sc->sc_subdev, flags);
                sc->sc_subdev = NULL;
        }

        return (rv);
}

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 && err != USBD_STALLED)
                printf("%s: ubsa_request: %s\n",
                    sc->sc_dev.dv_xname, usbd_errstr(err));
        return (err);
}

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);
}

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);
}

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);
}

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;
        }
}

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:
                DPRINTF(("%s: ubsa_param: unsupported baudrate, "
                    "forcing default of 9600\n",
                    sc->sc_dev.dv_xname));
                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);
}

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);
}

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:
                DPRINTF(("%s: ubsa_param: unsupported databits requested, "
                    "forcing default of 8\n",
                    sc->sc_dev.dv_xname));
                value = 3;
        }

        ubsa_request(sc, UBSA_SET_DATA_BITS, value);
}

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);
}

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);
}

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);
}

int
ubsa_open(void *addr, int portno)
{
        struct ubsa_softc *sc = addr;
        int err;

        if (usbd_is_dying(sc->sc_udev))
                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_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",
                            sc->sc_dev.dv_xname,
                            sc->sc_intr_number);
                        return (EIO);
                }
        }

        return (0);
}

void
ubsa_close(void *addr, int portno)
{
        struct ubsa_softc *sc = addr;
        int err;

        if (usbd_is_dying(sc->sc_udev))
                return;

        DPRINTF(("ubsa_close: close\n"));

        if (sc->sc_intr_pipe != NULL) {
                err = usbd_close_pipe(sc->sc_intr_pipe);
                if (err)
                        printf("%s: close interrupt pipe failed: %s\n",
                            sc->sc_dev.dv_xname,
                            usbd_errstr(err));
                free(sc->sc_intr_buf, M_USBDEV, sc->sc_isize);
                sc->sc_intr_pipe = NULL;
        }
}

void
ubsa_intr(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
        struct ubsa_softc *sc = priv;
        u_char *buf;
        struct usb_cdc_notification *cdcbuf;

        buf = sc->sc_intr_buf;
        cdcbuf = (struct usb_cdc_notification *)sc->sc_intr_buf;
        if (usbd_is_dying(sc->sc_udev))
                return;

        if (status != USBD_NORMAL_COMPLETION) {
                if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
                        return;

                DPRINTF(("%s: ubsa_intr: abnormal status: %s\n",
                    sc->sc_dev.dv_xname, usbd_errstr(status)));
                usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
                return;
        }

#if 1 /* test */
        if (cdcbuf->bmRequestType == UCDC_NOTIFICATION) {
                printf("%s: this device is using CDC notify message in" 
                    " intr pipe.\n"
                    "Please send your dmesg to <bugs@openbsd.org>, thanks.\n",
                    sc->sc_dev.dv_xname);
                printf("%s: intr buffer 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n", 
                    sc->sc_dev.dv_xname,
                    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);

                /* check the buffer data */
                if (cdcbuf->bNotification == UCDC_N_SERIAL_STATE)
                        printf("%s:notify serial state, len=%d, data=0x%02x\n",
                            sc->sc_dev.dv_xname,
                            UGETW(cdcbuf->wLength), cdcbuf->data[0]);
        }
#endif

        /* 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",
            sc->sc_dev.dv_xname, sc->sc_lsr, sc->sc_msr));

        ucom_status_change((struct ucom_softc *)sc->sc_subdev);
}

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;
}