root/dev/usb/ucom.c

DEFINITIONS

1. ucom_lock
2. ucom_unlock
3. ucom_match
4. ucom_attach
5. ucom_detach
6. ucom_activate
7. ucom_shutdown
8. ucomopen
9. ucomclose
10. ucomread
11. ucomwrite
12. ucomtty
13. ucomioctl
14. ucom_do_ioctl
15. tiocm_to_ucom
16. ucom_to_tiocm
17. ucom_break
18. ucom_dtr
19. ucom_rts
20. ucom_status_change
21. ucomparam
22. ucom_hwiflow
23. ucomstart
24. ucomstop
25. ucomwritecb
26. ucomstartread
27. ucomreadcb
28. ucom_cleanup
29. ucomprint
30. ucomsubmatch

    1 /*      $OpenBSD: ucom.c,v 1.41 2007/06/14 10:11:15 mbalmer Exp $ */
    2 /*      $NetBSD: ucom.c,v 1.49 2003/01/01 00:10:25 thorpej Exp $        */
    4 /*
    5  * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Lennart Augustsson (lennart@augustsson.net) at
   10  * Carlstedt Research & Technology.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. All advertising materials mentioning features or use of this software
   21  *    must display the following acknowledgement:
   22  *        This product includes software developed by the NetBSD
   23  *        Foundation, Inc. and its contributors.
   24  * 4. Neither the name of The NetBSD Foundation nor the names of its
   25  *    contributors may be used to endorse or promote products derived
   26  *    from this software without specific prior written permission.
   27  *
   28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   38  * POSSIBILITY OF SUCH DAMAGE.
   39  */
   40 /*
   41  * This code is very heavily based on the 16550 driver, com.c.
   42  */
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/rwlock.h>
   48 #include <sys/ioctl.h>
   49 #include <sys/conf.h>
   50 #include <sys/tty.h>
   51 #include <sys/file.h>
   52 #include <sys/selinfo.h>
   53 #include <sys/proc.h>
   54 #include <sys/vnode.h>
   55 #include <sys/device.h>
   56 #include <sys/poll.h>
   58 #include <dev/usb/usb.h>
   60 #include <dev/usb/usbdi.h>
   61 #include <dev/usb/usbdi_util.h>
   62 #include <dev/usb/uhidev.h>
   63 #include <dev/usb/usbdevs.h>
   64 #include <dev/usb/usb_quirks.h>
   66 #include <dev/usb/ucomvar.h>
   68 #include "ucom.h"
   70 #if NUCOM > 0
   72 #ifdef UCOM_DEBUG
   73 #define DPRINTFN(n, x)  do { if (ucomdebug > (n)) printf x; } while (0)
   74 int ucomdebug = 0;
   75 #else
   76 #define DPRINTFN(n, x)
   77 #endif
   78 #define DPRINTF(x) DPRINTFN(0, x)
   80 #define UCOMUNIT_MASK           0x7f
   81 #define UCOMCUA_MASK            0x80
   83 #define LINESW(tp, func)        (linesw[(tp)->t_line].func)
   85 #define UCOMUNIT(x)             (minor(x) & UCOMUNIT_MASK)
   86 #define UCOMCUA(x)              (minor(x) & UCOMCUA_MASK)
   88 struct ucom_softc {
   89         struct device           sc_dev;         /* base device */
usbd_device_handle      sc_udev;        /* USB device */
   92         struct uhidev_softc     *sc_uhidev;     /* hid device (if deeper) */
usbd_interface_handle   sc_iface;       /* data interface */
   96         int                     sc_bulkin_no;   /* bulk in endpoint address */
usbd_pipe_handle        sc_bulkin_pipe; /* bulk in pipe */
usbd_xfer_handle        sc_ixfer;       /* read request */
u_char                  *sc_ibuf;       /* read buffer */
u_int                   sc_ibufsize;    /* read buffer size */
u_int                   sc_ibufsizepad; /* read buffer size padded */
  103         int                     sc_bulkout_no;  /* bulk out endpoint address */
usbd_pipe_handle        sc_bulkout_pipe;/* bulk out pipe */
usbd_xfer_handle        sc_oxfer;       /* write request */
u_char                  *sc_obuf;       /* write buffer */
u_int                   sc_obufsize;    /* write buffer size */
u_int                   sc_opkthdrlen;  /* header length of
  109                                                  * output packet */
usbd_pipe_handle        sc_ipipe;       /* hid interrupt input pipe */
usbd_pipe_handle        sc_opipe;       /* hid interrupt pipe */
  114         struct ucom_methods     *sc_methods;
  115         void                    *sc_parent;
  116         int                     sc_portno;
  118         struct tty              *sc_tty;        /* our tty */
u_char                  sc_lsr;
u_char                  sc_msr;
u_char                  sc_mcr;
u_char                  sc_tx_stopped;
  123         int                     sc_swflags;
u_char                  sc_cua;
  127         struct rwlock           sc_lock;        /* lock during open */
  128         int                     sc_open;
  129         int                     sc_refcnt;
u_char                  sc_dying;       /* disconnecting */
  131 };
  133 void    ucom_cleanup(struct ucom_softc *);
  134 void    ucom_hwiflow(struct ucom_softc *);
  135 int     ucomparam(struct tty *, struct termios *);
  136 void    ucomstart(struct tty *);
  137 void    ucom_shutdown(struct ucom_softc *);
  138 int     ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t,
  139                               int, struct proc *);
  140 void    ucom_dtr(struct ucom_softc *, int);
  141 void    ucom_rts(struct ucom_softc *, int);
  142 void    ucom_break(struct ucom_softc *, int);
usbd_status ucomstartread(struct ucom_softc *);
  144 void    ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status);
  145 void    ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status);
  146 void    tiocm_to_ucom(struct ucom_softc *, u_long, int);
  147 int     ucom_to_tiocm(struct ucom_softc *);
  148 void    ucom_lock(struct ucom_softc *);
  149 void    ucom_unlock(struct ucom_softc *);
  151 int ucom_match(struct device *, void *, void *); 
  152 void ucom_attach(struct device *, struct device *, void *); 
  153 int ucom_detach(struct device *, int); 
  154 int ucom_activate(struct device *, enum devact); 
  156 struct cfdriver ucom_cd = { 
NULL, "ucom", DV_DULL 
  158 }; 
  160 const struct cfattach ucom_ca = { 
  161         sizeof(struct ucom_softc), 
ucom_match, 
ucom_attach, 
ucom_detach, 
ucom_activate, 
  166 };
  168 void
ucom_lock(struct ucom_softc *sc)
  170 {
sc->sc_refcnt++;
rw_enter_write(&sc->sc_lock);
  173 }
  175 void
ucom_unlock(struct ucom_softc *sc)
  177 {
rw_exit_write(&sc->sc_lock);
  179         if (--sc->sc_refcnt < 0)
usb_detach_wakeup(&sc->sc_dev);
  181 }
  183 int
ucom_match(struct device *parent, void *match, void *aux)
  185 {
  186         return (1);
  187 }
  189 void
ucom_attach(struct device *parent, struct device *self, void *aux)
  191 {
  192         struct ucom_softc *sc = (struct ucom_softc *)self;
  193         struct ucom_attach_args *uca = aux;
  194         struct tty *tp;
  196         if (uca->info != NULL)
printf(", %s", uca->info);
printf("\n");
sc->sc_udev = uca->device;
sc->sc_iface = uca->iface;
sc->sc_bulkout_no = uca->bulkout;
sc->sc_bulkin_no = uca->bulkin;
sc->sc_uhidev = uca->uhidev;
sc->sc_ibufsize = uca->ibufsize;
sc->sc_ibufsizepad = uca->ibufsizepad;
sc->sc_obufsize = uca->obufsize;
sc->sc_opkthdrlen = uca->opkthdrlen;
sc->sc_methods = uca->methods;
sc->sc_parent = uca->arg;
sc->sc_portno = uca->portno;
tp = ttymalloc();
tp->t_oproc = ucomstart;
tp->t_param = ucomparam;
sc->sc_tty = tp;
sc->sc_cua = 0;
rw_init(&sc->sc_lock, "ucomlk");
sc->sc_open = 0;
  222 }
  224 int
ucom_detach(struct device *self, int flags)
  226 {
  227         struct ucom_softc *sc = (struct ucom_softc *)self;
  228         struct tty *tp = sc->sc_tty;
  229         int maj, mn;
  230         int s;
DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p, pipe=%d,%d\n",
sc, flags, tp, sc->sc_bulkin_no, sc->sc_bulkout_no));
sc->sc_dying = 1;
  237         if (sc->sc_bulkin_pipe != NULL)
usbd_abort_pipe(sc->sc_bulkin_pipe);
  239         if (sc->sc_bulkout_pipe != NULL)
usbd_abort_pipe(sc->sc_bulkout_pipe);
s = splusb();
  243         if (--sc->sc_refcnt >= 0) {
  244                 /* Wake up anyone waiting */
  245                 if (tp != NULL) {
CLR(tp->t_state, TS_CARR_ON);
CLR(tp->t_cflag, CLOCAL | MDMBUF);
ttyflush(tp, FREAD|FWRITE);
  249                 }
  250                 /* Wait for processes to go away. */
usb_detach_wait(&sc->sc_dev);
  252         }
splx(s);
  255         /* locate the major number */
  256         for (maj = 0; maj < nchrdev; maj++)
  257                 if (cdevsw[maj].d_open == ucomopen)
  258                         break;
  260         /* Nuke the vnodes for any open instances. */
mn = self->dv_unit;
DPRINTF(("ucom_detach: maj=%d mn=%d\n", maj, mn));
vdevgone(maj, mn, mn, VCHR);
vdevgone(maj, mn | UCOMCUA_MASK, mn | UCOMCUA_MASK, VCHR);
  266         /* Detach and free the tty. */
  267         if (tp != NULL) {
ttyfree(tp);
sc->sc_tty = NULL;
  270         }
  272         return (0);
  273 }
  275 int
ucom_activate(struct device *self, enum devact act)
  277 {
  278         struct ucom_softc *sc = (struct ucom_softc *)self;
DPRINTFN(5,("ucom_activate: %d\n", act));
  282         switch (act) {
  283         case DVACT_ACTIVATE:
  284                 break;
  286         case DVACT_DEACTIVATE:
sc->sc_dying = 1;
  288                 break;
  289         }
  290         return (0);
  291 }
  293 void
ucom_shutdown(struct ucom_softc *sc)
  295 {
  296         struct tty *tp = sc->sc_tty;
DPRINTF(("ucom_shutdown\n"));
  299         /*
  300          * Hang up if necessary.  Wait a bit, so the other side has time to
  301          * notice even if we immediately open the port again.
  302          */
  303         if (ISSET(tp->t_cflag, HUPCL)) {
ucom_dtr(sc, 0);
  305                 (void)tsleep(sc, TTIPRI, ttclos, hz);
  306         }
  307 }
  309 int
ucomopen(dev_t dev, int flag, int mode, struct proc *p)
  311 {
  312         int unit = UCOMUNIT(dev);
usbd_status err;
  314         struct ucom_softc *sc;
  315         struct tty *tp;
  316         struct termios t;
  317         int s;
  318         int error;
  320         if (unit >= ucom_cd.cd_ndevs)
  321                 return (ENXIO);
sc = ucom_cd.cd_devs[unit];
  323         if (sc == NULL)
  324                 return (ENXIO);
  326         if (sc->sc_dying)
  327                 return (EIO);
  329         if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0)
  330                 return (ENXIO);
  332         /* open the pipes if this is the first open */
ucom_lock(sc);
  334         if (sc->sc_open++ == 0) {
s = splusb();
DPRINTF(("ucomopen: open pipes in=%d out=%d\n",
sc->sc_bulkin_no, sc->sc_bulkout_no));
DPRINTF(("ucomopen: hid %p pipes in=%p out=%p\n",
sc->sc_uhidev, sc->sc_ipipe, sc->sc_opipe));
  342                 if (sc->sc_bulkin_no != -1) {
  344                         /* Open the bulk pipes */
err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0,
  346                             &sc->sc_bulkin_pipe);
  347                         if (err) {
DPRINTF(("%s: open bulk out error (addr %d), err=%s\n",
sc->sc_dev.dv_xname, sc->sc_bulkin_no,
usbd_errstr(err)));
error = EIO;
  352                                 goto fail_0;
  353                         }
err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no,
USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
  356                         if (err) {
DPRINTF(("%s: open bulk in error (addr %d), err=%s\n",
sc->sc_dev.dv_xname, sc->sc_bulkout_no,
usbd_errstr(err)));
error = EIO;
  361                                 goto fail_1;
  362                         }
  364                         /* Allocate a request and an input buffer and start reading. */
sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev);
  366                         if (sc->sc_ixfer == NULL) {
error = ENOMEM;
  368                                 goto fail_2;
  369                         }
sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer,
sc->sc_ibufsizepad);
  373                         if (sc->sc_ibuf == NULL) {
error = ENOMEM;
  375                                 goto fail_2;
  376                         }
sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev);
  379                         if (sc->sc_oxfer == NULL) {
error = ENOMEM;
  381                                 goto fail_3;
  382                         }
  383                 } else {
  384                         /*
  385                          * input/output pipes and xfers already allocated
  386                          * as is the input buffer.
  387                          */
sc->sc_ipipe = sc->sc_uhidev->sc_ipipe;
sc->sc_ixfer = sc->sc_uhidev->sc_ixfer;
sc->sc_opipe = sc->sc_uhidev->sc_opipe;
sc->sc_oxfer = sc->sc_uhidev->sc_oxfer;
  392                 }
sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer,
sc->sc_obufsize + sc->sc_opkthdrlen);
  396                 if (sc->sc_obuf == NULL) {
error = ENOMEM;
  398                         goto fail_4;
  399                 }
  401                 if (sc->sc_methods->ucom_open != NULL) {
error = sc->sc_methods->ucom_open(sc->sc_parent,
sc->sc_portno);
  404                         if (error) {
ucom_cleanup(sc);
splx(s);
ucom_unlock(sc);
  408                                 return (error);
  409                         }
  410                 }
ucom_status_change(sc);
ucomstartread(sc);
splx(s);
  417         }
ucom_unlock(sc);
s = spltty();
tp = sc->sc_tty;
splx(s);
DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp));
tp->t_dev = dev;
  427         if (!ISSET(tp->t_state, TS_ISOPEN)) {
SET(tp->t_state, TS_WOPEN);
ttychars(tp);
  431                 /*
  432                  * Initialize the termios status to the defaults.  Add in the
  433                  * sticky bits from TIOCSFLAGS.
  434                  */
t.c_ispeed = 0;
t.c_ospeed = TTYDEF_SPEED;
t.c_cflag = TTYDEF_CFLAG;
  438                 if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL))
SET(t.c_cflag, CLOCAL);
  440                 if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS))
SET(t.c_cflag, CRTSCTS);
  442                 if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF))
SET(t.c_cflag, MDMBUF);
  445                 /* Make sure ucomparam() will do something. */
tp->t_ospeed = 0;
  447                 (void) ucomparam(tp, &t);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_lflag = TTYDEF_LFLAG;
s = spltty();
ttsetwater(tp);
  455                 /*
  456                  * Turn on DTR.  We must always do this, even if carrier is not
  457                  * present, because otherwise we'd have to use TIOCSDTR
  458                  * immediately after setting CLOCAL, which applications do not
  459                  * expect.  We always assert DTR while the device is open
  460                  * unless explicitly requested to deassert it.
  461                  */
ucom_dtr(sc, 1);
  464                 /* XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK);*/
ucom_hwiflow(sc);
  467                 if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR) || UCOMCUA(dev) ||
ISSET(sc->sc_msr, UMSR_DCD) || ISSET(tp->t_cflag, MDMBUF))
SET(tp->t_state, TS_CARR_ON);
  470                 else
CLR(tp->t_state, TS_CARR_ON);
  472         } else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) {
error = EBUSY;
  474                 goto bad;
  475         } else
s = spltty();
  478         if (UCOMCUA(dev)) {
  479                 if (ISSET(tp->t_state, TS_ISOPEN)) {
  480                         /* Someone is already dialed in */
error = EBUSY;
  482                         goto bad1;
  483                 }
sc->sc_cua = 1;
  485         } else {
  486                 /* tty (not cua) device, wait for carrier */
  487                 if (ISSET(flag, O_NONBLOCK)) {
  488                         if (sc->sc_cua) {
error = EBUSY;
  490                                 goto bad1;
  491                         }
  492                 } else {
  493                         while (sc->sc_cua || (!ISSET(tp->t_cflag, CLOCAL) &&
  494                             !ISSET(tp->t_state, TS_CARR_ON))) {
SET(tp->t_state, TS_WOPEN);
error = ttysleep(tp, &tp->t_rawq,
TTIPRI | PCATCH, ttopen, 0);
  498                                 /*
  499                                  * If TS_WOPEN has been reset, that means the
  500                                  * cua device has been closed.  We don't want
  501                                  * to fail in that case, so just go around
  502                                  * again.
  503                                  */
  504                                 if (error && ISSET(tp->t_state, TS_WOPEN)) {
CLR(tp->t_state, TS_WOPEN);
  506                                         goto bad1;
  507                                 }
  508                         }
  509                 }
  510         }
splx(s);
error = ttyopen(UCOMUNIT(dev), tp);
  514         if (error)
  515                 goto bad;
error = (*LINESW(tp, l_open))(dev, tp);
  518         if (error)
  519                 goto bad;
  521         return (0);
fail_4:
  524         if (sc->sc_uhidev == NULL)
usbd_free_xfer(sc->sc_oxfer);
sc->sc_oxfer = NULL;
fail_3:
usbd_free_xfer(sc->sc_ixfer);
sc->sc_ixfer = NULL;
fail_2:
usbd_close_pipe(sc->sc_bulkout_pipe);
sc->sc_bulkout_pipe = NULL;
fail_1:
usbd_close_pipe(sc->sc_bulkin_pipe);
sc->sc_bulkin_pipe = NULL;
fail_0:
splx(s);
ucom_unlock(sc);
  539         return (error);
bad1:
splx(s);
bad:
ucom_lock(sc);
ucom_cleanup(sc);
ucom_unlock(sc);
  548         return (error);
  549 }
  551 int
  552 ucomclose(dev_t dev, int flag, int mode, struct proc *p)
  553 {
  554         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
  555         struct tty *tp = sc->sc_tty;
  556         int s;
  558         if (!ISSET(tp->t_state, TS_ISOPEN))
  559                 return (0);
DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev)));
ucom_lock(sc);
  564         (*LINESW(tp, l_close))(tp, flag);
s = spltty();
CLR(tp->t_state, TS_BUSY | TS_FLUSH);
sc->sc_cua = 0;
ttyclose(tp);
ucom_cleanup(sc);
splx(s);
  572         if (sc->sc_methods->ucom_close != NULL)
sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno);
ucom_unlock(sc);
  577         return (0);
  578 }
  580 int
  581 ucomread(dev_t dev, struct uio *uio, int flag)
  582 {
  583         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
  584         struct tty *tp = sc->sc_tty;
  585         int error;
  587         if (sc->sc_dying)
  588                 return (EIO);
sc->sc_refcnt++;
error = (*LINESW(tp, l_read))(tp, uio, flag);
  592         if (--sc->sc_refcnt < 0)
usb_detach_wakeup(&sc->sc_dev);
  594         return (error);
  595 }
  597 int
  598 ucomwrite(dev_t dev, struct uio *uio, int flag)
  599 {
  600         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
  601         struct tty *tp = sc->sc_tty;
  602         int error;
  604         if (sc->sc_dying)
  605                 return (EIO);
sc->sc_refcnt++;
error = (*LINESW(tp, l_write))(tp, uio, flag);
  609         if (--sc->sc_refcnt < 0)
usb_detach_wakeup(&sc->sc_dev);
  611         return (error);
  612 }
  614 struct tty *
  615 ucomtty(dev_t dev)
  616 {
  617         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
  618         struct tty *tp = sc->sc_tty;
  620         return (tp);
  621 }
  623 int
  624 ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
  625 {
  626         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)];
  627         int error;
sc->sc_refcnt++;
error = ucom_do_ioctl(sc, cmd, data, flag, p);
  631         if (--sc->sc_refcnt < 0)
usb_detach_wakeup(&sc->sc_dev);
  633         return (error);
  634 }
  636 int
ucom_do_ioctl(struct ucom_softc *sc, u_long cmd, caddr_t data,
  638               int flag, struct proc *p)
  639 {
  640         struct tty *tp = sc->sc_tty;
  641         int error;
  642         int s;
  644         if (sc->sc_dying)
  645                 return (EIO);
DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd));
error = (*LINESW(tp, l_ioctl))(tp, cmd, data, flag, p);
  650         if (error >= 0)
  651                 return (error);
error = ttioctl(tp, cmd, data, flag, p);
  654         if (error >= 0)
  655                 return (error);
  657         if (sc->sc_methods->ucom_ioctl != NULL) {
error = sc->sc_methods->ucom_ioctl(sc->sc_parent,
sc->sc_portno, cmd, data, flag, p);
  660                 if (error >= 0)
  661                         return (error);
  662         }
error = 0;
DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd));
s = spltty();
  669         switch (cmd) {
  670         case TIOCSBRK:
ucom_break(sc, 1);
  672                 break;
  674         case TIOCCBRK:
ucom_break(sc, 0);
  676                 break;
  678         case TIOCSDTR:
ucom_dtr(sc, 1);
  680                 break;
  682         case TIOCCDTR:
ucom_dtr(sc, 0);
  684                 break;
  686         case TIOCGFLAGS:
  687                 *(int *)data = sc->sc_swflags;
  688                 break;
  690         case TIOCSFLAGS:
error = suser(p, 0);
  692                 if (error)
  693                         break;
sc->sc_swflags = *(int *)data;
  695                 break;
  697         case TIOCMSET:
  698         case TIOCMBIS:
  699         case TIOCMBIC:
tiocm_to_ucom(sc, cmd, *(int *)data);
  701                 break;
  703         case TIOCMGET:
  704                 *(int *)data = ucom_to_tiocm(sc);
  705                 break;
  707         default:
error = ENOTTY;
  709                 break;
  710         }
splx(s);
  714         return (error);
  715 }
  717 void
tiocm_to_ucom(struct ucom_softc *sc, u_long how, int ttybits)
  719 {
u_char combits;
combits = 0;
  723         if (ISSET(ttybits, TIOCM_DTR))
SET(combits, UMCR_DTR);
  725         if (ISSET(ttybits, TIOCM_RTS))
SET(combits, UMCR_RTS);
  728         switch (how) {
  729         case TIOCMBIC:
CLR(sc->sc_mcr, combits);
  731                 break;
  733         case TIOCMBIS:
SET(sc->sc_mcr, combits);
  735                 break;
  737         case TIOCMSET:
CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS);
SET(sc->sc_mcr, combits);
  740                 break;
  741         }
  743         if (how == TIOCMSET || ISSET(combits, UMCR_DTR))
ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0);
  745         if (how == TIOCMSET || ISSET(combits, UMCR_RTS))
ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0);
  747 }
  749 int
ucom_to_tiocm(struct ucom_softc *sc)
  751 {
u_char combits;
  753         int ttybits = 0;
combits = sc->sc_mcr;
  756         if (ISSET(combits, UMCR_DTR))
SET(ttybits, TIOCM_DTR);
  758         if (ISSET(combits, UMCR_RTS))
SET(ttybits, TIOCM_RTS);
combits = sc->sc_msr;
  762         if (ISSET(combits, UMSR_DCD))
SET(ttybits, TIOCM_CD);
  764         if (ISSET(combits, UMSR_CTS))
SET(ttybits, TIOCM_CTS);
  766         if (ISSET(combits, UMSR_DSR))
SET(ttybits, TIOCM_DSR);
  768         if (ISSET(combits, UMSR_RI | UMSR_TERI))
SET(ttybits, TIOCM_RI);
  771 #if 0
XXX;
  773         if (sc->sc_ier != 0)
SET(ttybits, TIOCM_LE);
  775 #endif
  777         return (ttybits);
  778 }
  780 void
ucom_break(sc, onoff)
  782         struct ucom_softc *sc;
  783         int onoff;
  784 {
DPRINTF(("ucom_break: onoff=%d\n", onoff));
  787         if (sc->sc_methods->ucom_set != NULL)
sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno,
UCOM_SET_BREAK, onoff);
  790 }
  792 void
ucom_dtr(struct ucom_softc *sc, int onoff)
  794 {
DPRINTF(("ucom_dtr: onoff=%d\n", onoff));
  797         if (sc->sc_methods->ucom_set != NULL) {
sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno,
UCOM_SET_DTR, onoff);
  800                 /* When not using CRTSCTS, RTS follows DTR. */
  801                 if (!(sc->sc_swflags & TIOCFLAG_CRTSCTS))
ucom_rts(sc, onoff);
  803         }
  804 }
  806 void
ucom_rts(struct ucom_softc *sc, int onoff)
  808 {
DPRINTF(("ucom_rts: onoff=%d\n", onoff));
  811         if (sc->sc_methods->ucom_set != NULL)
sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno,
UCOM_SET_RTS, onoff);
  814 }
  816 void
ucom_status_change(struct ucom_softc *sc)
  818 {
  819         struct tty *tp = sc->sc_tty;
u_char old_msr;
  822         if (sc->sc_methods->ucom_get_status != NULL) {
old_msr = sc->sc_msr;
sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno,
  825                     &sc->sc_lsr, &sc->sc_msr);
ttytstamp(tp, old_msr & UMSR_CTS, sc->sc_msr & UMSR_CTS,
old_msr & UMSR_DCD, sc->sc_msr & UMSR_DCD);
  830                 if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD))
  831                         (*LINESW(tp, l_modem))(tp,
ISSET(sc->sc_msr, UMSR_DCD));
  833         } else {
sc->sc_lsr = 0;
sc->sc_msr = 0;
  836         }
  837 }
  839 int
ucomparam(struct tty *tp, struct termios *t)
  841 {
  842         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
  843         int error;
  845         if (sc->sc_dying)
  846                 return (EIO);
  848         /* Check requested parameters. */
  849         if (t->c_ispeed && t->c_ispeed != t->c_ospeed)
  850                 return (EINVAL);
  852         /*
  853          * For the console, always force CLOCAL and !HUPCL, so that the port
  854          * is always active.
  855          */
  856         if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) {
SET(t->c_cflag, CLOCAL);
CLR(t->c_cflag, HUPCL);
  859         }
  861         /*
  862          * If there were no changes, don't do anything.  This avoids dropping
  863          * input and improves performance when all we did was frob things like
  864          * VMIN and VTIME.
  865          */
  866         if (tp->t_ospeed == t->c_ospeed &&
tp->t_cflag == t->c_cflag)
  868                 return (0);
  870         /* XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); */
  872         /* And copy to tty. */
tp->t_ispeed = 0;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
  877         if (sc->sc_methods->ucom_param != NULL) {
error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno,
t);
  880                 if (error)
  881                         return (error);
  882         }
  884         /* XXX worry about CHWFLOW */
  886         /*
  887          * Update the tty layer's idea of the carrier bit, in case we changed
  888          * CLOCAL or MDMBUF.  We don't hang up here; we only do that by
  889          * explicit request.
  890          */
DPRINTF(("ucomparam: l_modem\n"));
  892         (void) (*LINESW(tp, l_modem))(tp, 1 /* XXX carrier */ );
  894 #if 0
XXX what if the hardware is not open
  896         if (!ISSET(t->c_cflag, CHWFLOW)) {
  897                 if (sc->sc_tx_stopped) {
sc->sc_tx_stopped = 0;
ucomstart(tp);
  900                 }
  901         }
  902 #endif
  904         return (0);
  905 }
  907 /*
  908  * (un)block input via hw flowcontrol
  909  */
  910 void
ucom_hwiflow(struct ucom_softc *sc)
  912 {
DPRINTF(("ucom_hwiflow:\n"));
  914 #if 0
XXX
bus_space_tag_t iot = sc->sc_iot;
bus_space_handle_t ioh = sc->sc_ioh;
  919         if (sc->sc_mcr_rts == 0)
  920                 return;
  922         if (ISSET(sc->sc_rx_flags, RX_ANY_BLOCK)) {
CLR(sc->sc_mcr, sc->sc_mcr_rts);
CLR(sc->sc_mcr_active, sc->sc_mcr_rts);
  925         } else {
SET(sc->sc_mcr, sc->sc_mcr_rts);
SET(sc->sc_mcr_active, sc->sc_mcr_rts);
  928         }
bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active);
  930 #endif
  931 }
  933 void
ucomstart(struct tty *tp)
  935 {
  936         struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];
usbd_status err;
  938         int s;
u_char *data;
  940         int cnt;
  942         if (sc->sc_dying)
  943                 return;
s = spltty();
  946         if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) {
DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state));
  948                 goto out;
  949         }
  950         if (sc->sc_tx_stopped)
  951                 goto out;
  953         if (tp->t_outq.c_cc <= tp->t_lowat) {
  954                 if (ISSET(tp->t_state, TS_ASLEEP)) {
CLR(tp->t_state, TS_ASLEEP);
wakeup(&tp->t_outq);
  957                 }
selwakeup(&tp->t_wsel);
  959                 if (tp->t_outq.c_cc == 0)
  960                         goto out;
  961         }
  963         /* Grab the first contiguous region of buffer space. */
data = tp->t_outq.c_cf;
cnt = ndqb(&tp->t_outq, 0);
  967         if (cnt == 0) {
DPRINTF(("ucomstart: cnt==0\n"));
  969                 goto out;
  970         }
SET(tp->t_state, TS_BUSY);
  974         if (cnt > sc->sc_obufsize) {
DPRINTF(("ucomstart: big buffer %d chars\n", cnt));
cnt = sc->sc_obufsize;
  977         }
  978         if (sc->sc_methods->ucom_write != NULL)
sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno,
sc->sc_obuf, data, &cnt);
  981         else
memcpy(sc->sc_obuf, data, cnt);
DPRINTFN(4,("ucomstart: %d chars\n", cnt));
  985 #ifdef DIAGNOSTIC
  986         if (sc->sc_oxfer == NULL) {
printf("ucomstart: null oxfer\n");
  988                 goto out;
  989         }
  990 #endif
  991         if (sc->sc_bulkout_pipe != NULL) {
usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe,
  993                     (usbd_private_handle)sc, sc->sc_obuf, cnt,
USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
  995         } else {
usbd_setup_xfer(sc->sc_oxfer, sc->sc_opipe,
  997                     (usbd_private_handle)sc, sc->sc_obuf, cnt,
USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb);
  999         }
 1000         /* What can we do on error? */
err = usbd_transfer(sc->sc_oxfer);
 1002 #ifdef DIAGNOSTIC
 1003         if (err != USBD_IN_PROGRESS)
printf("ucomstart: err=%s\n", usbd_errstr(err));
 1005 #endif
out:
splx(s);
 1009 }
 1011 int
 1012 ucomstop(struct tty *tp, int flag)
 1013 {
DPRINTF(("ucomstop: flag=%d\n", flag));
 1015 #if 0
 1016         /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/
 1017         int s;
s = spltty();
 1020         if (ISSET(tp->t_state, TS_BUSY)) {
DPRINTF(("ucomstop: XXX\n"));
 1022                 /* sc->sc_tx_stopped = 1; */
 1023                 if (!ISSET(tp->t_state, TS_TTSTOP))
SET(tp->t_state, TS_FLUSH);
 1025         }
splx(s);
 1027 #endif
 1028         return (0);
 1029 }
 1031 void
ucomwritecb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
 1033 {
 1034         struct ucom_softc *sc = (struct ucom_softc *)p;
 1035         struct tty *tp = sc->sc_tty;
u_int32_t cc;
 1037         int s;
DPRINTFN(5,("ucomwritecb: %p %p status=%d\n", xfer, p, status));
 1041         if (status == USBD_CANCELLED || sc->sc_dying)
 1042                 goto error;
 1044         if (sc->sc_bulkin_pipe != NULL) {
 1045                 if (status) {
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
 1047                         /* XXX we should restart after some delay. */
 1048                         goto error;
 1049                 }
usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 1051         } else {
usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL);
 1053                 // XXX above gives me wrong cc, no?
 1054         }
DPRINTFN(5,("ucomwritecb: cc=%d\n", cc));
 1057         /* convert from USB bytes to tty bytes */
cc -= sc->sc_opkthdrlen;
s = spltty();
CLR(tp->t_state, TS_BUSY);
 1062         if (ISSET(tp->t_state, TS_FLUSH))
CLR(tp->t_state, TS_FLUSH);
 1064         else
ndflush(&tp->t_outq, cc);
 1066         (*LINESW(tp, l_start))(tp);
splx(s);
 1068         return;
error:
s = spltty();
CLR(tp->t_state, TS_BUSY);
splx(s);
 1074 }
usbd_status
ucomstartread(struct ucom_softc *sc)
 1078 {
usbd_status err;
DPRINTFN(5,("ucomstartread: start\n"));
 1082 #ifdef DIAGNOSTIC
 1083         if (sc->sc_ixfer == NULL) {
DPRINTF(("ucomstartread: null ixfer\n"));
 1085                 return (USBD_INVAL);
 1086         }
 1087 #endif
 1089         if (sc->sc_bulkin_pipe != NULL) {
usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe,
 1091                         (usbd_private_handle)sc,
sc->sc_ibuf, sc->sc_ibufsize,
USBD_SHORT_XFER_OK | USBD_NO_COPY,
USBD_NO_TIMEOUT, ucomreadcb);
err = usbd_transfer(sc->sc_ixfer);
 1096                 if (err != USBD_IN_PROGRESS) {
DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err)));
 1098                         return (err);
 1099                 }
 1100         }
 1102         return (USBD_NORMAL_COMPLETION);
 1103 }
 1105 void
ucomreadcb(usbd_xfer_handle xfer, usbd_private_handle p, usbd_status status)
 1107 {
 1108         struct ucom_softc *sc = (struct ucom_softc *)p;
 1109         struct tty *tp = sc->sc_tty;
 1110         int (*rint)(int c, struct tty *tp) = LINESW(tp, l_rint);
usbd_status err;
u_int32_t cc;
u_char *cp;
 1114         int s;
DPRINTFN(5,("ucomreadcb: status=%d\n", status));
 1118         if (status == USBD_CANCELLED || status == USBD_IOERROR ||
sc->sc_dying) {
DPRINTF(("ucomreadcb: dying\n"));
 1121                 /* Send something to wake upper layer */
s = spltty();
 1123                 (*rint)('\n', tp);
ttwakeup(tp);
splx(s);
 1126                 return;
 1127         }
 1129         if (status) {
 1130                 if (sc->sc_bulkin_pipe != NULL) {
usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe);
 1132                         /* XXX we should restart after some delay. */
 1133                         return;
 1134                 }
 1135         }
usbd_get_xfer_status(xfer, NULL, (void *)&cp, &cc, NULL);
DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp));
 1139         if (sc->sc_methods->ucom_read != NULL)
sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno,
 1141                                           &cp, &cc);
s = spltty();
 1144         /* Give characters to tty layer. */
 1145         while (cc-- > 0) {
DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp));
 1147                 if ((*rint)(*cp++, tp) == -1) {
 1148                         /* XXX what should we do? */
printf("%s: lost %d chars\n", sc->sc_dev.dv_xname,
cc);
 1151                         break;
 1152                 }
 1153         }
splx(s);
err = ucomstartread(sc);
 1157         if (err) {
printf("%s: read start failed\n", sc->sc_dev.dv_xname);
 1159                 /* XXX what should we dow now? */
 1160         }
 1161 }
 1163 void
ucom_cleanup(struct ucom_softc *sc)
 1165 {
 1166         if (--sc->sc_open == 0) {
DPRINTF(("ucom_cleanup: closing pipes\n"));
ucom_shutdown(sc);
 1170                 if (sc->sc_bulkin_pipe != NULL) {
usbd_abort_pipe(sc->sc_bulkin_pipe);
usbd_close_pipe(sc->sc_bulkin_pipe);
sc->sc_bulkin_pipe = NULL;
 1174                 }
 1175                 if (sc->sc_bulkout_pipe != NULL) {
usbd_abort_pipe(sc->sc_bulkout_pipe);
usbd_close_pipe(sc->sc_bulkout_pipe);
sc->sc_bulkout_pipe = NULL;
 1179                 }
 1180                 if (sc->sc_ixfer != NULL) {
 1181                         if (sc->sc_uhidev == NULL)
usbd_free_xfer(sc->sc_ixfer);
sc->sc_ixfer = NULL;
 1184                 }
 1185                 if (sc->sc_oxfer != NULL) {
usbd_free_buffer(sc->sc_oxfer);
 1187                         if (sc->sc_uhidev == NULL)
usbd_free_xfer(sc->sc_oxfer);
sc->sc_oxfer = NULL;
 1190                 }
 1191         }
 1192 }
 1194 #endif /* NUCOM > 0 */
 1196 int
ucomprint(void *aux, const char *pnp)
 1198 {
 1199         struct ucom_attach_args *uca = aux;
 1201         if (pnp)
printf("ucom at %s", pnp);
 1203         if (uca->portno != UCOM_UNK_PORTNO)
printf(" portno %d", uca->portno);
 1205         return (UNCONF);
 1206 }
 1208 int
ucomsubmatch(struct device *parent, void *match, void *aux)
 1210 {
 1211         struct ucom_attach_args *uca = aux;
 1212         struct cfdata *cf = match;
 1214         if (uca->portno != UCOM_UNK_PORTNO &&
cf->ucomcf_portno != UCOM_UNK_PORTNO &&
cf->ucomcf_portno != uca->portno)
 1217                 return (0);
 1218         return ((*cf->cf_attach->ca_match)(parent, cf, aux));
 1219 }