/* $OpenBSD: ucom.c,v 1.3 2000/04/14 22:50:25 aaron Exp $ */ /* $NetBSD: ucom.c,v 1.22 2000/04/14 14:21:55 augustss Exp $ */ /* * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Lennart Augustsson (augustss@carlstedt.se) at * Carlstedt Research & Technology. * * 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. */ /* * This code is very heavily based on the 16550 driver, com.c. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ucom.h" #if NUCOM > 0 #ifdef UCOM_DEBUG #define DPRINTFN(n, x) if (ucomdebug > (n)) logprintf x int ucomdebug = 0; #else #define DPRINTFN(n, x) #endif #define DPRINTF(x) DPRINTFN(0, x) #define UCOMUNIT_MASK 0x3ffff #define UCOMDIALOUT_MASK 0x80000 #define UCOMCALLUNIT_MASK 0x40000 #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) #define UCOMDIALOUT(x) (minor(x) & UCOMDIALOUT_MASK) #define UCOMCALLUNIT(x) (minor(x) & UCOMCALLUNIT_MASK) struct ucom_softc { USBBASEDEVICE sc_dev; /* base device */ usbd_device_handle sc_udev; /* USB device */ usbd_interface_handle sc_iface; /* data interface */ 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 */ 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_obufsizepad; /* write buffer size padded */ struct ucom_methods *sc_methods; void *sc_parent; int sc_portno; struct tty *sc_tty; /* our tty */ u_char sc_lsr; u_char sc_msr; u_char sc_mcr; u_char sc_tx_stopped; int sc_swflags; u_char sc_opening; /* lock during open */ int sc_refcnt; u_char sc_dying; /* disconnecting */ }; cdev_decl(ucom); Static void ucom_cleanup __P((struct ucom_softc *)); Static void ucom_hwiflow __P((struct ucom_softc *)); Static int ucomparam __P((struct tty *, struct termios *)); Static void ucomstart __P((struct tty *)); Static void ucom_shutdown __P((struct ucom_softc *)); Static int ucom_do_ioctl __P((struct ucom_softc *, u_long, caddr_t, int, struct proc *)); Static void ucom_dtr __P((struct ucom_softc *, int)); Static void ucom_rts __P((struct ucom_softc *, int)); Static void ucom_break __P((struct ucom_softc *, int)); Static usbd_status ucomstartread __P((struct ucom_softc *)); Static void ucomreadcb __P((usbd_xfer_handle, usbd_private_handle, usbd_status status)); Static void ucomwritecb __P((usbd_xfer_handle, usbd_private_handle, usbd_status status)); Static void tiocm_to_ucom __P((struct ucom_softc *, int, int)); Static int ucom_to_tiocm __P((struct ucom_softc *)); USB_DECLARE_DRIVER(ucom); USB_MATCH(ucom) { return (1); } USB_ATTACH(ucom) { struct ucom_softc *sc = (struct ucom_softc *)self; struct ucom_attach_args *uca = aux; struct tty *tp; if (uca->portno != UCOM_UNK_PORTNO) printf(": portno %d", uca->portno); 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_ibufsize = uca->ibufsize; sc->sc_ibufsizepad = uca->ibufsizepad; sc->sc_obufsize = uca->obufsize; sc->sc_obufsizepad = uca->obufsizepad; 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; DPRINTF(("ucom_attach: tty_attach %p\n", tp)); tty_attach(tp); USB_ATTACH_SUCCESS_RETURN; } USB_DETACH(ucom) { struct ucom_softc *sc = (struct ucom_softc *)self; int maj, mn; int s; DPRINTF(("ucom_detach: sc=%p flags=%d tp=%p\n", sc, flags, sc->sc_tty)); sc->sc_dying = 1; #ifdef DIAGNOSTIC if (sc->sc_tty == NULL) { DPRINTF(("ucom_detach: no tty\n")); return (0); } #endif s = splusb(); if (--sc->sc_refcnt >= 0) { /* Wake everyone.. how? */ /* Wait for processes to go away. */ usb_detach_wait(USBDEV(sc->sc_dev)); } splx(s); /* locate the major number */ for (maj = 0; maj < nchrdev; maj++) if (cdevsw[maj].d_open == ucomopen) break; /* 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 | UCOMDIALOUT_MASK, mn | UCOMDIALOUT_MASK, VCHR); vdevgone(maj, mn | UCOMCALLUNIT_MASK, mn | UCOMCALLUNIT_MASK, VCHR); /* Detach and free the tty. */ tty_detach(sc->sc_tty); ttyfree(sc->sc_tty); sc->sc_tty = 0; return (0); } #if defined(__NetBSD__) || defined(__OpenBSD__) int ucom_activate(self, act) device_ptr_t self; enum devact act; { struct ucom_softc *sc = (struct ucom_softc *)self; switch (act) { case DVACT_ACTIVATE: return (EOPNOTSUPP); break; case DVACT_DEACTIVATE: sc->sc_dying = 1; break; } return (0); } #endif void ucom_shutdown(sc) struct ucom_softc *sc; { struct tty *tp = sc->sc_tty; DPRINTF(("ucom_shutdown\n")); /* * Hang up if necessary. Wait a bit, so the other side has time to * notice even if we immediately open the port again. */ if (ISSET(tp->t_cflag, HUPCL)) { ucom_dtr(sc, 0); (void)tsleep(sc, TTIPRI, ttclos, hz); } } int ucomopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = UCOMUNIT(dev); usbd_status err; struct ucom_softc *sc; struct tty *tp; int s; int error; if (unit >= ucom_cd.cd_ndevs) return (ENXIO); sc = ucom_cd.cd_devs[unit]; if (sc == NULL) return (ENXIO); if (sc->sc_dying) return (EIO); if (ISSET(sc->sc_dev.dv_flags, DVF_ACTIVE) == 0) return (ENXIO); tp = sc->sc_tty; DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); if (ISSET(tp->t_state, TS_ISOPEN) && ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) return (EBUSY); s = spltty(); /* * Do the following iff this is a first open. */ while (sc->sc_opening) tsleep(&sc->sc_opening, PRIBIO, "ucomop", 0); if (sc->sc_dying) { splx(s); return (EIO); } sc->sc_opening = 1; #if defined(__NetBSD__) if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { #else if (!ISSET(tp->t_state, TS_ISOPEN)) { #endif struct termios t; tp->t_dev = dev; if (sc->sc_methods->ucom_open != NULL) { error = sc->sc_methods->ucom_open(sc->sc_parent, sc->sc_portno); if (error) { ucom_cleanup(sc); return (error); } } ucom_status_change(sc); /* * Initialize the termios status to the defaults. Add in the * sticky bits from TIOCSFLAGS. */ t.c_ispeed = 0; t.c_ospeed = TTYDEF_SPEED; t.c_cflag = TTYDEF_CFLAG; if (ISSET(sc->sc_swflags, TIOCFLAG_CLOCAL)) SET(t.c_cflag, CLOCAL); if (ISSET(sc->sc_swflags, TIOCFLAG_CRTSCTS)) SET(t.c_cflag, CRTSCTS); if (ISSET(sc->sc_swflags, TIOCFLAG_MDMBUF)) SET(t.c_cflag, MDMBUF); /* Make sure ucomparam() will do something. */ tp->t_ospeed = 0; (void) ucomparam(tp, &t); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_lflag = TTYDEF_LFLAG; ttychars(tp); ttsetwater(tp); /* * Turn on DTR. We must always do this, even if carrier is not * present, because otherwise we'd have to use TIOCSDTR * immediately after setting CLOCAL, which applications do not * expect. We always assert DTR while the device is open * unless explicitly requested to deassert it. */ ucom_dtr(sc, 1); // XXX CLR(sc->sc_rx_flags, RX_ANY_BLOCK); ucom_hwiflow(sc); DPRINTF(("ucomopen: open pipes in=%d out=%d\n", sc->sc_bulkin_no, sc->sc_bulkout_no)); /* Open the bulk pipes */ err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_no, 0, &sc->sc_bulkin_pipe); if (err) { DPRINTF(("%s: open bulk out error (addr %d), err=%s\n", USBDEVNAME(sc->sc_dev), sc->sc_bulkin_no, usbd_errstr(err))); return (EIO); } err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_no, USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); if (err) { DPRINTF(("%s: open bulk in error (addr %d), err=%s\n", USBDEVNAME(sc->sc_dev), sc->sc_bulkout_no, usbd_errstr(err))); usbd_close_pipe(sc->sc_bulkin_pipe); return (EIO); } /* Allocate a request and an input buffer and start reading. */ sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); if (sc->sc_ixfer == NULL) { usbd_close_pipe(sc->sc_bulkin_pipe); usbd_close_pipe(sc->sc_bulkout_pipe); return (ENOMEM); } sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, sc->sc_ibufsizepad); if (sc->sc_ibuf == NULL) { usbd_free_xfer(sc->sc_ixfer); usbd_close_pipe(sc->sc_bulkin_pipe); usbd_close_pipe(sc->sc_bulkout_pipe); return (ENOMEM); } sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); if (sc->sc_oxfer == NULL) { usbd_free_xfer(sc->sc_ixfer); usbd_close_pipe(sc->sc_bulkin_pipe); usbd_close_pipe(sc->sc_bulkout_pipe); return (ENOMEM); } sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, sc->sc_obufsizepad); if (sc->sc_obuf == NULL) { usbd_free_xfer(sc->sc_oxfer); usbd_free_xfer(sc->sc_ixfer); usbd_close_pipe(sc->sc_bulkin_pipe); usbd_close_pipe(sc->sc_bulkout_pipe); return (ENOMEM); } ucomstartread(sc); } sc->sc_opening = 0; wakeup(&sc->sc_opening); splx(s); #if defined(__NetBSD__) error = ttyopen(tp, UCOMDIALOUT(dev), ISSET(flag, O_NONBLOCK)); #else error = ttyopen(UCOMDIALOUT(dev), tp); #endif if (error) goto bad; error = (*linesw[tp->t_line].l_open)(dev, tp); if (error) goto bad; return (0); bad: #if defined(__NetBSD__) if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { #else if (!ISSET(tp->t_state, TS_ISOPEN)) { #endif /* * We failed to open the device, and nobody else had it opened. * Clean up the state as appropriate. */ ucom_cleanup(sc); } return (error); } int ucomclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; struct tty *tp = sc->sc_tty; DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); if (!ISSET(tp->t_state, TS_ISOPEN)) return (0); sc->sc_refcnt++; (*linesw[tp->t_line].l_close)(tp, flag); ttyclose(tp); #if defined(__NetBSD__) if (!ISSET(tp->t_state, TS_ISOPEN) && tp->t_wopen == 0) { #else if (!ISSET(tp->t_state, TS_ISOPEN)) { #endif /* * Although we got a last close, the device may still be in * use; e.g. if this was the dialout node, and there are still * processes waiting for carrier on the non-dialout node. */ ucom_cleanup(sc); } if (sc->sc_methods->ucom_close != NULL) sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (0); } int ucomread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; struct tty *tp = sc->sc_tty; int error; if (sc->sc_dying) return (EIO); sc->sc_refcnt++; error = ((*linesw[tp->t_line].l_read)(tp, uio, flag)); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (error); } int ucomwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; struct tty *tp = sc->sc_tty; int error; if (sc->sc_dying) return (EIO); sc->sc_refcnt++; error = ((*linesw[tp->t_line].l_write)(tp, uio, flag)); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (error); } struct tty * ucomtty(dev) dev_t dev; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; struct tty *tp = sc->sc_tty; return (tp); } int ucomioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; int error; sc->sc_refcnt++; error = ucom_do_ioctl(sc, cmd, data, flag, p); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (error); } Static int ucom_do_ioctl(sc, cmd, data, flag, p) struct ucom_softc *sc; u_long cmd; caddr_t data; int flag; struct proc *p; { struct tty *tp = sc->sc_tty; int error; int s; if (sc->sc_dying) return (EIO); DPRINTF(("ucomioctl: cmd=0x%08lx\n", cmd)); error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p); if (error >= 0) return (error); error = ttioctl(tp, cmd, data, flag, p); if (error >= 0) return (error); if (sc->sc_methods->ucom_ioctl != NULL) { error = sc->sc_methods->ucom_ioctl(sc->sc_parent, sc->sc_portno, cmd, data, flag, p); if (error >= 0) return (error); } error = 0; DPRINTF(("ucomioctl: our cmd=0x%08lx\n", cmd)); s = spltty(); switch (cmd) { case TIOCSBRK: ucom_break(sc, 1); break; case TIOCCBRK: ucom_break(sc, 0); break; case TIOCSDTR: ucom_dtr(sc, 1); break; case TIOCCDTR: ucom_dtr(sc, 0); break; case TIOCGFLAGS: *(int *)data = sc->sc_swflags; break; case TIOCSFLAGS: error = suser(p->p_ucred, &p->p_acflag); if (error) break; sc->sc_swflags = *(int *)data; break; case TIOCMSET: case TIOCMBIS: case TIOCMBIC: tiocm_to_ucom(sc, cmd, *(int *)data); break; case TIOCMGET: *(int *)data = ucom_to_tiocm(sc); break; default: error = ENOTTY; break; } splx(s); return (error); } Static void tiocm_to_ucom(sc, how, ttybits) struct ucom_softc *sc; int how, ttybits; { u_char combits; combits = 0; if (ISSET(ttybits, TIOCM_DTR)) SET(combits, UMCR_DTR); if (ISSET(ttybits, TIOCM_RTS)) SET(combits, UMCR_RTS); switch (how) { case TIOCMBIC: CLR(sc->sc_mcr, combits); break; case TIOCMBIS: SET(sc->sc_mcr, combits); break; case TIOCMSET: CLR(sc->sc_mcr, UMCR_DTR | UMCR_RTS); SET(sc->sc_mcr, combits); break; } ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); } Static int ucom_to_tiocm(sc) struct ucom_softc *sc; { u_char combits; int ttybits = 0; combits = sc->sc_mcr; if (ISSET(combits, UMCR_DTR)) SET(ttybits, TIOCM_DTR); if (ISSET(combits, UMCR_RTS)) SET(ttybits, TIOCM_RTS); combits = sc->sc_msr; if (ISSET(combits, UMSR_DCD)) SET(ttybits, TIOCM_CD); if (ISSET(combits, UMSR_CTS)) SET(ttybits, TIOCM_CTS); if (ISSET(combits, UMSR_DSR)) SET(ttybits, TIOCM_DSR); if (ISSET(combits, UMSR_RI | UMSR_TERI)) SET(ttybits, TIOCM_RI); #if 0 XXX; if (sc->sc_ier != 0) SET(ttybits, TIOCM_LE); #endif return (ttybits); } Static void ucom_break(sc, onoff) struct ucom_softc *sc; int onoff; { DPRINTF(("ucom_break: onoff=%d\n", onoff)); if (sc->sc_methods->ucom_set != NULL) sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, UCOM_SET_BREAK, onoff); } Static void ucom_dtr(sc, onoff) struct ucom_softc *sc; int onoff; { DPRINTF(("ucom_dtr: onoff=%d\n", onoff)); if (sc->sc_methods->ucom_set != NULL) sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, UCOM_SET_DTR, onoff); } Static void ucom_rts(sc, onoff) struct ucom_softc *sc; int onoff; { DPRINTF(("ucom_rts: onoff=%d\n", onoff)); if (sc->sc_methods->ucom_set != NULL) sc->sc_methods->ucom_set(sc->sc_parent, sc->sc_portno, UCOM_SET_RTS, onoff); } void ucom_status_change(sc) struct ucom_softc *sc; { if (sc->sc_methods->ucom_get_status != NULL) { sc->sc_methods->ucom_get_status(sc->sc_parent, sc->sc_portno, &sc->sc_lsr, &sc->sc_msr); } else { sc->sc_lsr = 0; sc->sc_msr = 0; } } Static int ucomparam(tp, t) struct tty *tp; struct termios *t; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; int error; if (sc->sc_dying) return (EIO); /* Check requested parameters. */ if (t->c_ispeed && t->c_ispeed != t->c_ospeed) return (EINVAL); /* * For the console, always force CLOCAL and !HUPCL, so that the port * is always active. */ if (ISSET(sc->sc_swflags, TIOCFLAG_SOFTCAR)) { SET(t->c_cflag, CLOCAL); CLR(t->c_cflag, HUPCL); } /* * If there were no changes, don't do anything. This avoids dropping * input and improves performance when all we did was frob things like * VMIN and VTIME. */ if (tp->t_ospeed == t->c_ospeed && tp->t_cflag == t->c_cflag) return (0); //XXX lcr = ISSET(sc->sc_lcr, LCR_SBREAK) | cflag2lcr(t->c_cflag); /* And copy to tty. */ tp->t_ispeed = 0; tp->t_ospeed = t->c_ospeed; tp->t_cflag = t->c_cflag; if (sc->sc_methods->ucom_param != NULL) { error = sc->sc_methods->ucom_param(sc->sc_parent, sc->sc_portno, t); if (error) return (error); } // XXX worry about CHWFLOW /* * Update the tty layer's idea of the carrier bit, in case we changed * CLOCAL or MDMBUF. We don't hang up here; we only do that by * explicit request. */ DPRINTF(("ucomparam: l_modem\n")); (void) (*linesw[tp->t_line].l_modem)(tp, 1 /* XXX carrier */ ); #if 0 XXX what if the hardware is not open if (!ISSET(t->c_cflag, CHWFLOW)) { if (sc->sc_tx_stopped) { sc->sc_tx_stopped = 0; ucomstart(tp); } } #endif return (0); } /* * (un)block input via hw flowcontrol */ Static void ucom_hwiflow(sc) struct ucom_softc *sc; { DPRINTF(("ucom_hwiflow:\n")); #if 0 XXX bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; if (sc->sc_mcr_rts == 0) return; 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); } else { SET(sc->sc_mcr, sc->sc_mcr_rts); SET(sc->sc_mcr_active, sc->sc_mcr_rts); } bus_space_write_1(iot, ioh, com_mcr, sc->sc_mcr_active); #endif } Static void ucomstart(tp) struct tty *tp; { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)]; usbd_status err; int s; u_char *data; int cnt; if (sc->sc_dying) return; s = spltty(); if (ISSET(tp->t_state, TS_BUSY | TS_TIMEOUT | TS_TTSTOP)) { DPRINTFN(4,("ucomstart: no go, state=0x%x\n", tp->t_state)); goto out; } if (sc->sc_tx_stopped) goto out; if (tp->t_outq.c_cc <= tp->t_lowat) { if (ISSET(tp->t_state, TS_ASLEEP)) { CLR(tp->t_state, TS_ASLEEP); wakeup(&tp->t_outq); } selwakeup(&tp->t_wsel); if (tp->t_outq.c_cc == 0) goto out; } /* Grab the first contiguous region of buffer space. */ data = tp->t_outq.c_cf; cnt = ndqb(&tp->t_outq, 0); if (cnt == 0) { DPRINTF(("ucomstart: cnt==0\n")); goto out; } SET(tp->t_state, TS_BUSY); if (cnt > sc->sc_obufsize) { DPRINTF(("ucomstart: big buffer %d chars\n", cnt)); cnt = sc->sc_obufsize; } if (sc->sc_methods->ucom_write != NULL) sc->sc_methods->ucom_write(sc->sc_parent, sc->sc_portno, sc->sc_obuf, data, &cnt); else memcpy(sc->sc_obuf, data, cnt); DPRINTFN(4,("ucomstart: %d chars\n", cnt)); usbd_setup_xfer(sc->sc_oxfer, sc->sc_bulkout_pipe, (usbd_private_handle)sc, sc->sc_obuf, cnt, USBD_NO_COPY, USBD_NO_TIMEOUT, ucomwritecb); /* What can we do on error? */ err = usbd_transfer(sc->sc_oxfer); #ifdef DIAGNOSTIC if (err != USBD_IN_PROGRESS) printf("ucomstart: err=%s\n", usbd_errstr(err)); #endif out: splx(s); } #if defined(__NetBSD__) void #else int #endif ucomstop(tp, flag) struct tty *tp; int flag; { DPRINTF(("ucomstop: flag=%d\n", flag)); #if 0 /*struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(tp->t_dev)];*/ int s; s = spltty(); if (ISSET(tp->t_state, TS_BUSY)) { DPRINTF(("ucomstop: XXX\n")); /* sc->sc_tx_stopped = 1; */ if (!ISSET(tp->t_state, TS_TTSTOP)) SET(tp->t_state, TS_FLUSH); } splx(s); #endif #if !defined(__NetBSD__) return 0; #endif } Static void ucomwritecb(xfer, p, status) usbd_xfer_handle xfer; usbd_private_handle p; usbd_status status; { struct ucom_softc *sc = (struct ucom_softc *)p; struct tty *tp = sc->sc_tty; u_int32_t cc; int s; DPRINTFN(5,("ucomwritecb: status=%d\n", status)); if (status == USBD_CANCELLED) return; if (status) { DPRINTF(("ucomwritecb: status=%d\n", status)); usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); /* XXX we should restart after some delay. */ return; } usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); s = spltty(); CLR(tp->t_state, TS_BUSY); if (ISSET(tp->t_state, TS_FLUSH)) CLR(tp->t_state, TS_FLUSH); else ndflush(&tp->t_outq, cc); (*linesw[tp->t_line].l_start)(tp); splx(s); } Static usbd_status ucomstartread(sc) struct ucom_softc *sc; { usbd_status err; DPRINTFN(5,("ucomstartread: start\n")); usbd_setup_xfer(sc->sc_ixfer, sc->sc_bulkin_pipe, (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); if (err != USBD_IN_PROGRESS) { DPRINTF(("ucomstartread: err=%s\n", usbd_errstr(err))); return (err); } return (USBD_NORMAL_COMPLETION); } Static void ucomreadcb(xfer, p, status) usbd_xfer_handle xfer; usbd_private_handle p; usbd_status status; { struct ucom_softc *sc = (struct ucom_softc *)p; struct tty *tp = sc->sc_tty; int (*rint) __P((int c, struct tty *tp)) = linesw[tp->t_line].l_rint; usbd_status err; u_int32_t cc; u_char *cp; int s; if (status == USBD_CANCELLED) return; if (status) { DPRINTF(("ucomreadcb: status=%d\n", status)); usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); /* XXX we should restart after some delay. */ return; } usbd_get_xfer_status(xfer, NULL, (void **)&cp, &cc, NULL); DPRINTFN(5,("ucomreadcb: got %d chars, tp=%p\n", cc, tp)); if (sc->sc_methods->ucom_read != NULL) sc->sc_methods->ucom_read(sc->sc_parent, sc->sc_portno, &cp, &cc); s = spltty(); /* Give characters to tty layer. */ while (cc-- > 0) { DPRINTFN(7,("ucomreadcb: char=0x%02x\n", *cp)); if ((*rint)(*cp++, tp) == -1) { /* XXX what should we do? */ printf("%s: lost %d chars\n", USBDEVNAME(sc->sc_dev), cc); break; } } splx(s); err = ucomstartread(sc); if (err) { printf("%s: read start failed\n", USBDEVNAME(sc->sc_dev)); /* XXX what should we dow now? */ } } Static void ucom_cleanup(sc) struct ucom_softc *sc; { DPRINTF(("ucom_cleanup: closing pipes\n")); ucom_shutdown(sc); usbd_abort_pipe(sc->sc_bulkin_pipe); usbd_close_pipe(sc->sc_bulkin_pipe); usbd_abort_pipe(sc->sc_bulkout_pipe); usbd_close_pipe(sc->sc_bulkout_pipe); usbd_free_xfer(sc->sc_ixfer); usbd_free_xfer(sc->sc_oxfer); } #endif /* NUCOM > 0 */ int ucomprint(aux, pnp) void *aux; const char *pnp; { if (pnp) printf("ucom at %s\n", pnp); return (UNCONF); } int #if defined(__OpenBSD__) ucomsubmatch(parent, match, aux) struct device *parent; void *match; void *aux; { struct cfdata *cf = match; #else ucomsubmatch(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { #endif struct ucom_attach_args *uca = aux; if (uca->portno != UCOM_UNK_PORTNO && cf->ucomcf_portno != UCOM_UNK_PORTNO && cf->ucomcf_portno != uca->portno) return (0); return ((*cf->cf_attach->ca_match)(parent, cf, aux)); }