sys/dev/usb/uvscom.c

root/sys/dev/usb/uvscom.c
/*      $NetBSD: uvscom.c,v 1.40 2022/11/01 19:24:31 andvar Exp $       */
/*-
 * Copyright (c) 2001-2002, Shunsuke Akiyama <akiyama@jp.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.
 *
 * $FreeBSD: src/sys/dev/usb/uvscom.c,v 1.1 2002/03/18 18:23:39 joe Exp $
 */

/*
 * uvscom: SUNTAC Slipper U VS-10U driver.
 * Slipper U is a PC card to USB converter for data communication card
 * adapter.  It supports DDI Pocket's Air H" C@rd, C@rd H" 64, NTT's P-in,
 * P-in m@ater and various data communication card adapters.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvscom.c,v 1.40 2022/11/01 19:24:31 andvar Exp $");

#ifdef _KERNEL_OPT
#include "opt_usb.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/fcntl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/poll.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 UVSCOM_DEBUG
static int      uvscomdebug = 1;

#define DPRINTFN(n, x)  do { \
                                if (uvscomdebug > (n)) \
                                        printf x; \
                        } while (0)
#else
#define DPRINTFN(n, x)
#endif
#define DPRINTF(x) DPRINTFN(0, x)

#define UVSCOM_CONFIG_INDEX     0
#define UVSCOM_IFACE_INDEX      0

#define UVSCOM_INTR_INTERVAL    100     /* mS */

#define UVSCOM_UNIT_WAIT        5

/* Request */
#define UVSCOM_SET_SPEED        0x10
#define UVSCOM_LINE_CTL         0x11
#define UVSCOM_SET_PARAM        0x12
#define UVSCOM_READ_STATUS      0xd0
#define UVSCOM_SHUTDOWN         0xe0

/* UVSCOM_SET_SPEED parameters */
#define UVSCOM_SPEED_150BPS     0x00
#define UVSCOM_SPEED_300BPS     0x01
#define UVSCOM_SPEED_600BPS     0x02
#define UVSCOM_SPEED_1200BPS    0x03
#define UVSCOM_SPEED_2400BPS    0x04
#define UVSCOM_SPEED_4800BPS    0x05
#define UVSCOM_SPEED_9600BPS    0x06
#define UVSCOM_SPEED_19200BPS   0x07
#define UVSCOM_SPEED_38400BPS   0x08
#define UVSCOM_SPEED_57600BPS   0x09
#define UVSCOM_SPEED_115200BPS  0x0a

/* UVSCOM_LINE_CTL parameters */
#define UVSCOM_BREAK            0x40
#define UVSCOM_RTS              0x02
#define UVSCOM_DTR              0x01
#define UVSCOM_LINE_INIT        0x08

/* UVSCOM_SET_PARAM parameters */
#define UVSCOM_DATA_MASK        0x03
#define UVSCOM_DATA_BIT_8       0x03
#define UVSCOM_DATA_BIT_7       0x02
#define UVSCOM_DATA_BIT_6       0x01
#define UVSCOM_DATA_BIT_5       0x00

#define UVSCOM_STOP_MASK        0x04
#define UVSCOM_STOP_BIT_2       0x04
#define UVSCOM_STOP_BIT_1       0x00

#define UVSCOM_PARITY_MASK      0x18
#define UVSCOM_PARITY_EVEN      0x18
#if 0
#define UVSCOM_PARITY_UNK       0x10
#endif
#define UVSCOM_PARITY_ODD       0x08
#define UVSCOM_PARITY_NONE      0x00

/* Status bits */
#define UVSCOM_TXRDY            0x04
#define UVSCOM_RXRDY            0x01

#define UVSCOM_DCD              0x08
#define UVSCOM_NOCARD           0x04
#define UVSCOM_DSR              0x02
#define UVSCOM_CTS              0x01
#define UVSCOM_USTAT_MASK       (UVSCOM_NOCARD | UVSCOM_DSR | UVSCOM_CTS)

struct  uvscom_softc {
        device_t                sc_dev;         /* base device */
        struct usbd_device *    sc_udev;        /* USB device */
        struct usbd_interface * sc_iface;       /* interface */
        int                     sc_iface_number;/* interface number */

        struct usbd_interface * sc_intr_iface;  /* interrupt interface */
        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;         /* uvscom status register */

        uint16_t                sc_lcr;         /* Line control */
        u_char                  sc_usr;         /* unit status */

        device_t                sc_subdev;      /* ucom device */
        bool                    sc_dying;       /* disconnecting */
};

/*
 * These are the maximum number of bytes transferred per frame.
 * The output buffer size cannot be increased due to the size encoding.
 */
#define UVSCOMIBUFSIZE 512
#define UVSCOMOBUFSIZE 64

static  usbd_status uvscom_readstat(struct uvscom_softc *);
static  usbd_status uvscom_shutdown(struct uvscom_softc *);
static  usbd_status uvscom_reset(struct uvscom_softc *);
static  usbd_status uvscom_set_line_coding(struct uvscom_softc *,
                                           uint16_t, uint16_t);
static  usbd_status uvscom_set_line(struct uvscom_softc *, uint16_t);
static  usbd_status uvscom_set_crtscts(struct uvscom_softc *);
static  void uvscom_get_status(void *, int, u_char *, u_char *);
static  void uvscom_dtr(struct uvscom_softc *, int);
static  void uvscom_rts(struct uvscom_softc *, int);
static  void uvscom_break(struct uvscom_softc *, int);

static  void uvscom_set(void *, int, int, int);
static  void uvscom_intr(struct usbd_xfer *, void *, usbd_status);
static  int  uvscom_param(void *, int, struct termios *);
static  int  uvscom_open(void *, int);
static  void uvscom_close(void *, int);

static const struct ucom_methods uvscom_methods = {
        .ucom_get_status = uvscom_get_status,
        .ucom_set = uvscom_set,
        .ucom_param = uvscom_param,
        .ucom_ioctl = NULL,             /* TODO */
        .ucom_open = uvscom_open,
        .ucom_close = uvscom_close,
};

static const struct usb_devno uvscom_devs [] = {
        /* SUNTAC U-Cable type A4 */
        { USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_AS144L4 },
        /* SUNTAC U-Cable type D2 */
        { USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_DS96L },
        /* SUNTAC U-Cable type P1 */
        { USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_PS64P1 },
        /* SUNTAC Slipper U  */
        { USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_VS10U },
        /* SUNTAC Ir-Trinity */
        { USB_VENDOR_SUNTAC, USB_PRODUCT_SUNTAC_IS96U },
};
#define uvscom_lookup(v, p) usb_lookup(uvscom_devs, v, p)

static int uvscom_match(device_t, cfdata_t, void *);
static void uvscom_attach(device_t, device_t, void *);
static void uvscom_childdet(device_t, device_t);
static int uvscom_detach(device_t, int);

CFATTACH_DECL2_NEW(uvscom, sizeof(struct uvscom_softc), uvscom_match,
    uvscom_attach, uvscom_detach, NULL, NULL, uvscom_childdet);

static int
uvscom_match(device_t parent, cfdata_t match, void *aux)
{
        struct usb_attach_arg *uaa = aux;

        return uvscom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ?
                UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}

static void
uvscom_attach(device_t parent, device_t self, void *aux)
{
        struct uvscom_softc *sc = device_private(self);
        struct usb_attach_arg *uaa = aux;
        struct usbd_device *dev = uaa->uaa_device;
        usb_config_descriptor_t *cdesc;
        usb_interface_descriptor_t *id;
        usb_endpoint_descriptor_t *ed;
        char *devinfop;
        usbd_status err;
        int i;
        struct ucom_attach_args ucaa;

        aprint_naive("\n");
        aprint_normal("\n");

        devinfop = usbd_devinfo_alloc(dev, 0);
        aprint_normal_dev(self, "%s\n", devinfop);
        usbd_devinfo_free(devinfop);

        sc->sc_dev = self;
        sc->sc_udev = dev;
        sc->sc_dying = false;

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

        /* initialize endpoints */
        ucaa.ucaa_bulkin = ucaa.ucaa_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, UVSCOM_CONFIG_INDEX, 1);
        if (err) {
                aprint_error_dev(self, "failed to set configuration, err=%s\n",
                    usbd_errstr(err));
                sc->sc_dying = true;
                return;
        }

        /* get the config descriptor */
        cdesc = usbd_get_config_descriptor(sc->sc_udev);

        if (cdesc == NULL) {
                aprint_error_dev(self,
                    "failed to get configuration descriptor\n");
                sc->sc_dying = true;
                return;
        }

        /* get the common interface */
        err = usbd_device2interface_handle(dev, UVSCOM_IFACE_INDEX,
                                           &sc->sc_iface);
        if (err) {
                aprint_error_dev(self, "failed to get interface, err=%s\n",
                    usbd_errstr(err));
                sc->sc_dying = true;
                return;
        }

        id = usbd_get_interface_descriptor(sc->sc_iface);
        sc->sc_iface_number = id->bInterfaceNumber;

        /* Find endpoints */
        for (i = 0; i < id->bNumEndpoints; i++) {
                ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
                if (ed == NULL) {
                        aprint_error_dev(self,
                            "no endpoint descriptor for %d\n", i);
                        sc->sc_dying = true;
                        return;
                }

                if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
                    UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        ucaa.ucaa_bulkin = ed->bEndpointAddress;
                } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
                           UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
                        ucaa.ucaa_bulkout = ed->bEndpointAddress;
                } else 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);
                }
        }

        if (ucaa.ucaa_bulkin == -1) {
                aprint_error_dev(self, "Could not find data bulk in\n");
                sc->sc_dying = true;
                return;
        }
        if (ucaa.ucaa_bulkout == -1) {
                aprint_error_dev(self, "Could not find data bulk out\n");
                sc->sc_dying = true;
                return;
        }
        if (sc->sc_intr_number == -1) {
                aprint_error_dev(self, "Could not find interrupt in\n");
                sc->sc_dying = true;
                return;
        }

        sc->sc_dtr = sc->sc_rts = 0;
        sc->sc_lcr = UVSCOM_LINE_INIT;

        ucaa.ucaa_portno = UCOM_UNK_PORTNO;
        /* ucaa_bulkin, ucaa_bulkout set above */
        ucaa.ucaa_ibufsize = UVSCOMIBUFSIZE;
        ucaa.ucaa_obufsize = UVSCOMOBUFSIZE;
        ucaa.ucaa_ibufsizepad = UVSCOMIBUFSIZE;
        ucaa.ucaa_opkthdrlen = 0;
        ucaa.ucaa_device = dev;
        ucaa.ucaa_iface = sc->sc_iface;
        ucaa.ucaa_methods = &uvscom_methods;
        ucaa.ucaa_arg = sc;
        ucaa.ucaa_info = NULL;

        err = uvscom_reset(sc);

        if (err) {
                aprint_error_dev(self, "reset failed, %s\n", usbd_errstr(err));
                sc->sc_dying = true;
                return;
        }

        DPRINTF(("uvscom: in = %#x out = %#x intr = %#x\n",
                 ucaa.ucaa_bulkin, ucaa.ucaa_bulkout, sc->sc_intr_number));

        usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);

        DPRINTF(("uplcom: in=%#x out=%#x intr=%#x\n",
                ucaa.ucaa_bulkin, ucaa.ucaa_bulkout, sc->sc_intr_number ));
        sc->sc_subdev = config_found(self, &ucaa, ucomprint,
            CFARGS(.submatch = ucomsubmatch));

        return;
}

static void
uvscom_childdet(device_t self, device_t child)
{
        struct uvscom_softc *sc = device_private(self);

        KASSERT(sc->sc_subdev == child);
        sc->sc_subdev = NULL;
}

static void 
uvscom_close_pipe(struct uvscom_softc *sc)
{

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

static int
uvscom_detach(device_t self, int flags)
{
        struct uvscom_softc *sc = device_private(self);
        int rv = 0;

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

        sc->sc_dying = true;
 
        uvscom_close_pipe(sc);

        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, sc->sc_dev);

        return rv;
}

static usbd_status
uvscom_readstat(struct uvscom_softc *sc)
{
        usb_device_request_t req;
        usbd_status err;
        uint16_t r;

        DPRINTF(("%s: send readstat\n", device_xname(sc->sc_dev)));

        req.bmRequestType = UT_READ_VENDOR_DEVICE;
        req.bRequest = UVSCOM_READ_STATUS;
        USETW(req.wValue, 0);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 2);

        err = usbd_do_request(sc->sc_udev, &req, &r);
        if (err) {
                aprint_error_dev(sc->sc_dev, "uvscom_readstat: %s\n",
                    usbd_errstr(err));
                return err;
        }

        DPRINTF(("%s: uvscom_readstat: r = %d\n",
                 device_xname(sc->sc_dev), r));

        return USBD_NORMAL_COMPLETION;
}

static usbd_status
uvscom_shutdown(struct uvscom_softc *sc)
{
        usb_device_request_t req;
        usbd_status err;

        DPRINTF(("%s: send shutdown\n", device_xname(sc->sc_dev)));

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = UVSCOM_SHUTDOWN;
        USETW(req.wValue, 0);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 0);

        err = usbd_do_request(sc->sc_udev, &req, NULL);
        if (err) {
                aprint_error_dev(sc->sc_dev, "uvscom_shutdown: %s\n",
                   usbd_errstr(err));
                return err;
        }

        return USBD_NORMAL_COMPLETION;
}

static usbd_status
uvscom_reset(struct uvscom_softc *sc)
{
        DPRINTF(("%s: uvscom_reset\n", device_xname(sc->sc_dev)));

        return USBD_NORMAL_COMPLETION;
}

static usbd_status
uvscom_set_crtscts(struct uvscom_softc *sc)
{
        DPRINTF(("%s: uvscom_set_crtscts\n", device_xname(sc->sc_dev)));

        return USBD_NORMAL_COMPLETION;
}

static usbd_status
uvscom_set_line(struct uvscom_softc *sc, uint16_t line)
{
        usb_device_request_t req;
        usbd_status err;

        DPRINTF(("%s: uvscom_set_line: %04x\n",
                 device_xname(sc->sc_dev), line));

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = UVSCOM_LINE_CTL;
        USETW(req.wValue, line);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 0);

        err = usbd_do_request(sc->sc_udev, &req, NULL);
        if (err) {
                aprint_error_dev(sc->sc_dev, "uvscom_set_line: %s\n",
                    usbd_errstr(err));
                return err;
        }

        return USBD_NORMAL_COMPLETION;
}

static usbd_status
uvscom_set_line_coding(struct uvscom_softc *sc, uint16_t lsp, uint16_t ls)
{
        usb_device_request_t req;
        usbd_status err;

        DPRINTF(("%s: uvscom_set_line_coding: %02x %02x\n",
                 device_xname(sc->sc_dev), lsp, ls));

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = UVSCOM_SET_SPEED;
        USETW(req.wValue, lsp);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 0);

        err = usbd_do_request(sc->sc_udev, &req, NULL);
        if (err) {
                aprint_error_dev(sc->sc_dev, "uvscom_set_line_coding: %s\n",
                   usbd_errstr(err));
                return err;
        }

        req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
        req.bRequest = UVSCOM_SET_PARAM;
        USETW(req.wValue, ls);
        USETW(req.wIndex, 0);
        USETW(req.wLength, 0);

        err = usbd_do_request(sc->sc_udev, &req, NULL);
        if (err) {
                aprint_error_dev(sc->sc_dev, "uvscom_set_line_coding: %s\n",
                   usbd_errstr(err));
                return err;
        }

        return USBD_NORMAL_COMPLETION;
}

static void
uvscom_dtr(struct uvscom_softc *sc, int onoff)
{
        DPRINTF(("%s: uvscom_dtr: onoff = %d\n",
                 device_xname(sc->sc_dev), onoff));

        if (sc->sc_dtr == onoff)
                return;                 /* no change */

        sc->sc_dtr = onoff;

        if (onoff)
                SET(sc->sc_lcr, UVSCOM_DTR);
        else
                CLR(sc->sc_lcr, UVSCOM_DTR);

        uvscom_set_line(sc, sc->sc_lcr);
}

static void
uvscom_rts(struct uvscom_softc *sc, int onoff)
{
        DPRINTF(("%s: uvscom_rts: onoff = %d\n",
                 device_xname(sc->sc_dev), onoff));

        if (sc->sc_rts == onoff)
                return;                 /* no change */

        sc->sc_rts = onoff;

        if (onoff)
                SET(sc->sc_lcr, UVSCOM_RTS);
        else
                CLR(sc->sc_lcr, UVSCOM_RTS);

        uvscom_set_line(sc, sc->sc_lcr);
}

static void
uvscom_break(struct uvscom_softc *sc, int onoff)
{
        DPRINTF(("%s: uvscom_break: onoff = %d\n",
                 device_xname(sc->sc_dev), onoff));

        if (onoff)
                uvscom_set_line(sc, SET(sc->sc_lcr, UVSCOM_BREAK));
}

static void
uvscom_set(void *addr, int portno, int reg, int onoff)
{
        struct uvscom_softc *sc = addr;

        if (sc->sc_dying)
                return;

        switch (reg) {
        case UCOM_SET_DTR:
                uvscom_dtr(sc, onoff);
                break;
        case UCOM_SET_RTS:
                uvscom_rts(sc, onoff);
                break;
        case UCOM_SET_BREAK:
                uvscom_break(sc, onoff);
                break;
        default:
                break;
        }
}

static int
uvscom_param(void *addr, int portno, struct termios *t)
{
        struct uvscom_softc *sc = addr;
        usbd_status err;
        uint16_t lsp;
        uint16_t ls;

        DPRINTF(("%s: uvscom_param: sc = %p\n",
                 device_xname(sc->sc_dev), sc));

        if (sc->sc_dying)
                return EIO;

        ls = 0;

        switch (t->c_ospeed) {
        case B150:
                lsp = UVSCOM_SPEED_150BPS;
                break;
        case B300:
                lsp = UVSCOM_SPEED_300BPS;
                break;
        case B600:
                lsp = UVSCOM_SPEED_600BPS;
                break;
        case B1200:
                lsp = UVSCOM_SPEED_1200BPS;
                break;
        case B2400:
                lsp = UVSCOM_SPEED_2400BPS;
                break;
        case B4800:
                lsp = UVSCOM_SPEED_4800BPS;
                break;
        case B9600:
                lsp = UVSCOM_SPEED_9600BPS;
                break;
        case B19200:
                lsp = UVSCOM_SPEED_19200BPS;
                break;
        case B38400:
                lsp = UVSCOM_SPEED_38400BPS;
                break;
        case B57600:
                lsp = UVSCOM_SPEED_57600BPS;
                break;
        case B115200:
                lsp = UVSCOM_SPEED_115200BPS;
                break;
        default:
                return EIO;
        }

        if (ISSET(t->c_cflag, CSTOPB))
                SET(ls, UVSCOM_STOP_BIT_2);
        else
                SET(ls, UVSCOM_STOP_BIT_1);

        if (ISSET(t->c_cflag, PARENB)) {
                if (ISSET(t->c_cflag, PARODD))
                        SET(ls, UVSCOM_PARITY_ODD);
                else
                        SET(ls, UVSCOM_PARITY_EVEN);
        } else
                SET(ls, UVSCOM_PARITY_NONE);

        switch (ISSET(t->c_cflag, CSIZE)) {
        case CS5:
                SET(ls, UVSCOM_DATA_BIT_5);
                break;
        case CS6:
                SET(ls, UVSCOM_DATA_BIT_6);
                break;
        case CS7:
                SET(ls, UVSCOM_DATA_BIT_7);
                break;
        case CS8:
                SET(ls, UVSCOM_DATA_BIT_8);
                break;
        default:
                return EIO;
        }

        err = uvscom_set_line_coding(sc, lsp, ls);
        if (err)
                return EIO;

        if (ISSET(t->c_cflag, CRTSCTS)) {
                err = uvscom_set_crtscts(sc);
                if (err)
                        return EIO;
        }

        return 0;
}

static int
uvscom_open(void *addr, int portno)
{
        struct uvscom_softc *sc = addr;
        int err;
        int i;

        if (sc->sc_dying)
                return EIO;

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

        if (sc->sc_intr_number != -1 && sc->sc_intr_pipe == NULL) {
                DPRINTF(("uvscom_open: open interrupt pipe.\n"));

                sc->sc_usr = 0;         /* clear unit status */

                err = uvscom_readstat(sc);
                if (err) {
                        DPRINTF(("%s: uvscom_open: readstat failed\n",
                                 device_xname(sc->sc_dev)));
                        return EIO;
                }

                sc->sc_intr_buf = kmem_alloc(sc->sc_isize, KM_SLEEP);
                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,
                                          uvscom_intr,
                                          UVSCOM_INTR_INTERVAL);
                if (err) {
                        aprint_error_dev(sc->sc_dev,
                            "cannot open interrupt pipe (addr %d)\n",
                                 sc->sc_intr_number);
                        return EIO;
                }
        } else {
                DPRINTF(("uvscom_open: did not open interrupt pipe.\n"));
        }

        if ((sc->sc_usr & UVSCOM_USTAT_MASK) == 0) {
                /* unit is not ready */

                for (i = UVSCOM_UNIT_WAIT; i > 0; --i) {
                        kpause("uvsopen", false, hz, NULL);
                        if (ISSET(sc->sc_usr, UVSCOM_USTAT_MASK))
                                break;
                }
                if (i == 0) {
                        DPRINTF(("%s: unit is not ready\n",
                                 device_xname(sc->sc_dev)));
                        return EIO;
                }

                /* check PC card was inserted */
                if (ISSET(sc->sc_usr, UVSCOM_NOCARD)) {
                        DPRINTF(("%s: no card\n",
                                 device_xname(sc->sc_dev)));
                        return EIO;
                }
        }

        return 0;
}

static void
uvscom_close(void *addr, int portno)
{
        struct uvscom_softc *sc = addr;

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

        if (sc->sc_dying) 
                return;

        uvscom_shutdown(sc);
        uvscom_close_pipe(sc);
}

static void
uvscom_intr(struct usbd_xfer *xfer, void *priv,
    usbd_status status)
{
        struct uvscom_softc *sc = priv;
        u_char *buf = sc->sc_intr_buf;
        u_char pstatus;

        if (sc->sc_dying)
                return;

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

                aprint_error_dev(sc->sc_dev,
                    "uvscom_intr: abnormal status: %s\n",
                    usbd_errstr(status));
                usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
                return;
        }

        DPRINTFN(2, ("%s: uvscom status = %02x %02x\n",
                 device_xname(sc->sc_dev), buf[0], buf[1]));

        sc->sc_lsr = sc->sc_msr = 0;
        sc->sc_usr = buf[1];

        pstatus = buf[0];
        if (ISSET(pstatus, UVSCOM_TXRDY))
                SET(sc->sc_lsr, ULSR_TXRDY);
        if (ISSET(pstatus, UVSCOM_RXRDY))
                SET(sc->sc_lsr, ULSR_RXRDY);

        pstatus = buf[1];
        if (ISSET(pstatus, UVSCOM_CTS))
                SET(sc->sc_msr, UMSR_CTS);
        if (ISSET(pstatus, UVSCOM_DSR))
                SET(sc->sc_msr, UMSR_DSR);
        if (ISSET(pstatus, UVSCOM_DCD))
                SET(sc->sc_msr, UMSR_DCD);

        ucom_status_change(device_private(sc->sc_subdev));
}

static void
uvscom_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
{
        struct uvscom_softc *sc = addr;

        if (sc->sc_dying)
                return;

        *lsr = sc->sc_lsr;
        *msr = sc->sc_msr;
}