/* $OpenBSD: ucom.c,v 1.26 2005/04/08 04:30:17 deraadt Exp $ */ /* $NetBSD: ucom.c,v 1.49 2003/01/01 00:10:25 thorpej 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 (lennart@augustsson.net) 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) do { if (ucomdebug > (n)) printf x; } while (0) int ucomdebug = 0; #else #define DPRINTFN(n, x) #endif #define DPRINTF(x) DPRINTFN(0, x) #define UCOMUNIT_MASK 0x7f #define UCOMCUA_MASK 0x80 #define LINESW(tp, func) (linesw[(tp)->t_line].func) #define UCOMUNIT(x) (minor(x) & UCOMUNIT_MASK) #define UCOMCUA(x) (minor(x) & UCOMCUA_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_opkthdrlen; /* header length of * output packet */ 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_cua; struct lock sc_lock; /* lock during open */ int sc_open; int sc_refcnt; u_char sc_dying; /* disconnecting */ }; Static void ucom_cleanup(struct ucom_softc *); Static void ucom_hwiflow(struct ucom_softc *); Static int ucomparam(struct tty *, struct termios *); Static void ucomstart(struct tty *); Static void ucom_shutdown(struct ucom_softc *); Static int ucom_do_ioctl(struct ucom_softc *, u_long, caddr_t, int, usb_proc_ptr); Static void ucom_dtr(struct ucom_softc *, int); Static void ucom_rts(struct ucom_softc *, int); Static void ucom_break(struct ucom_softc *, int); Static usbd_status ucomstartread(struct ucom_softc *); Static void ucomreadcb(usbd_xfer_handle, usbd_private_handle, usbd_status); Static void ucomwritecb(usbd_xfer_handle, usbd_private_handle, usbd_status); Static void tiocm_to_ucom(struct ucom_softc *, u_long, int); Static int ucom_to_tiocm(struct ucom_softc *); Static void ucom_lock(struct ucom_softc *); Static void ucom_unlock(struct ucom_softc *); USB_DECLARE_DRIVER(ucom); Static void ucom_lock(struct ucom_softc *sc) { sc->sc_refcnt++; usb_lockmgr(&sc->sc_lock, LK_EXCLUSIVE, NULL, curproc); } Static void ucom_unlock(struct ucom_softc *sc) { usb_lockmgr(&sc->sc_lock, LK_RELEASE, NULL, curproc); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); } 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->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_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; lockinit(&sc->sc_lock, PZERO, "ucomlk", 0, LK_CANRECURSE); sc->sc_open = 0; USB_ATTACH_SUCCESS_RETURN; } USB_DETACH(ucom) { struct ucom_softc *sc = (struct ucom_softc *)self; struct tty *tp = sc->sc_tty; int maj, mn; 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; if (sc->sc_bulkin_pipe != NULL) usbd_abort_pipe(sc->sc_bulkin_pipe); if (sc->sc_bulkout_pipe != NULL) usbd_abort_pipe(sc->sc_bulkout_pipe); s = splusb(); if (--sc->sc_refcnt >= 0) { /* Wake up anyone waiting */ if (tp != NULL) { CLR(tp->t_state, TS_CARR_ON); CLR(tp->t_cflag, CLOCAL | MDMBUF); ttyflush(tp, FREAD|FWRITE); } /* 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 | UCOMCUA_MASK, mn | UCOMCUA_MASK, VCHR); /* Detach and free the tty. */ if (tp != NULL) { ttyfree(tp); sc->sc_tty = NULL; } return (0); } int ucom_activate(device_ptr_t self, enum devact act) { struct ucom_softc *sc = (struct ucom_softc *)self; DPRINTFN(5,("ucom_activate: %d\n", act)); switch (act) { case DVACT_ACTIVATE: return (EOPNOTSUPP); case DVACT_DEACTIVATE: sc->sc_dying = 1; break; } return (0); } void ucom_shutdown(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_t dev, int flag, int mode, usb_proc_ptr p) { int unit = UCOMUNIT(dev); usbd_status err; struct ucom_softc *sc; struct tty *tp; struct termios t; 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); /* open the pipes if this is the first open */ ucom_lock(sc); if (sc->sc_open++ == 0) { s = splusb(); if (sc->sc_methods->ucom_open != NULL) { error = sc->sc_methods->ucom_open(sc->sc_parent, sc->sc_portno); if (error) { ucom_cleanup(sc); splx(s); ucom_unlock(sc); return (error); } } ucom_status_change(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))); error = EIO; goto fail_0; } 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))); error = EIO; goto fail_1; } /* Allocate a request and an input buffer and start reading. */ sc->sc_ixfer = usbd_alloc_xfer(sc->sc_udev); if (sc->sc_ixfer == NULL) { error = ENOMEM; goto fail_2; } sc->sc_ibuf = usbd_alloc_buffer(sc->sc_ixfer, sc->sc_ibufsizepad); if (sc->sc_ibuf == NULL) { error = ENOMEM; goto fail_3; } sc->sc_oxfer = usbd_alloc_xfer(sc->sc_udev); if (sc->sc_oxfer == NULL) { error = ENOMEM; goto fail_3; } sc->sc_obuf = usbd_alloc_buffer(sc->sc_oxfer, sc->sc_obufsize + sc->sc_opkthdrlen); if (sc->sc_obuf == NULL) { error = ENOMEM; goto fail_4; } ucomstartread(sc); splx(s); } ucom_unlock(sc); s = spltty(); tp = sc->sc_tty; splx(s); DPRINTF(("ucomopen: unit=%d, tp=%p\n", unit, tp)); tp->t_dev = dev; if (!ISSET(tp->t_state, TS_ISOPEN)) { SET(tp->t_state, TS_WOPEN); ttychars(tp); /* * 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; s = spltty(); 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); 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); else CLR(tp->t_state, TS_CARR_ON); } else if (ISSET(tp->t_state, TS_XCLUDE) && p->p_ucred->cr_uid != 0) { error = EBUSY; goto bad; } else s = spltty(); if (UCOMCUA(dev)) { if (ISSET(tp->t_state, TS_ISOPEN)) { /* Someone is already dialed in */ error = EBUSY; goto bad1; } sc->sc_cua = 1; } else { /* tty (not cua) device, wait for carrier */ if (ISSET(flag, O_NONBLOCK)) { if (sc->sc_cua) { error = EBUSY; goto bad1; } } else { while (sc->sc_cua || (!ISSET(tp->t_cflag, CLOCAL) && !ISSET(tp->t_state, TS_CARR_ON))) { SET(tp->t_state, TS_WOPEN); error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH, ttopen, 0); /* * If TS_WOPEN has been reset, that means the * cua device has been closed. We don't want * to fail in that case, so just go around * again. */ if (error && ISSET(tp->t_state, TS_WOPEN)) { CLR(tp->t_state, TS_WOPEN); goto bad1; } } } } splx(s); error = ttyopen(UCOMUNIT(dev), tp); if (error) goto bad; error = (*LINESW(tp, l_open))(dev, tp); if (error) goto bad; return (0); fail_4: 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); return (error); bad1: splx(s); bad: ucom_lock(sc); ucom_cleanup(sc); ucom_unlock(sc); return (error); } int ucomclose(dev_t dev, int flag, int mode, usb_proc_ptr p) { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; struct tty *tp = sc->sc_tty; int s; DPRINTF(("ucomclose: unit=%d\n", UCOMUNIT(dev))); if (!ISSET(tp->t_state, TS_ISOPEN)) return (0); ucom_lock(sc); (*LINESW(tp, l_close))(tp, flag); s = spltty(); ucom_cleanup(sc); CLR(tp->t_state, TS_BUSY | TS_FLUSH); sc->sc_cua = 0; splx(s); ttyclose(tp); if (sc->sc_methods->ucom_close != NULL) sc->sc_methods->ucom_close(sc->sc_parent, sc->sc_portno); ucom_unlock(sc); return (0); } int ucomread(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, l_read))(tp, uio, flag); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (error); } int ucomwrite(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, l_write))(tp, uio, flag); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (error); } #if defined(__NetBSD__) int ucompoll(dev_t dev, int events, usb_proc_ptr p) { 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, l_poll))(tp, events, p); if (--sc->sc_refcnt < 0) usb_detach_wakeup(USBDEV(sc->sc_dev)); return (error); } #endif struct tty * ucomtty(dev_t dev) { struct ucom_softc *sc = ucom_cd.cd_devs[UCOMUNIT(dev)]; struct tty *tp = sc->sc_tty; return (tp); } int ucomioctl(dev_t dev, u_long cmd, caddr_t data, int flag, usb_proc_ptr 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(struct ucom_softc *sc, u_long cmd, caddr_t data, int flag, usb_proc_ptr 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, 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, 0); 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(struct ucom_softc *sc, u_long how, int 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; } if (how == TIOCMSET || ISSET(combits, UMCR_DTR)) ucom_dtr(sc, (sc->sc_mcr & UMCR_DTR) != 0); if (how == TIOCMSET || ISSET(combits, UMCR_RTS)) ucom_rts(sc, (sc->sc_mcr & UMCR_RTS) != 0); } Static int ucom_to_tiocm(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(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); /* When not using CRTSCTS, RTS follows DTR. */ if (!(sc->sc_swflags & TIOCFLAG_CRTSCTS)) ucom_rts(sc, onoff); } } Static void ucom_rts(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(struct ucom_softc *sc) { struct tty *tp = sc->sc_tty; u_char old_msr; 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, &sc->sc_lsr, &sc->sc_msr); if (ISSET((sc->sc_msr ^ old_msr), UMSR_DCD)) (*LINESW(tp, l_modem))(tp, ISSET(sc->sc_msr, UMSR_DCD)); } else { sc->sc_lsr = 0; sc->sc_msr = 0; } } Static int ucomparam(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, 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(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(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); } int ucomstop(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 return (0); } Static void ucomwritecb(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 || sc->sc_dying) goto error; if (status) { DPRINTF(("ucomwritecb: status=%d\n", status)); usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); /* XXX we should restart after some delay. */ goto error; } usbd_get_xfer_status(xfer, NULL, NULL, &cc, NULL); DPRINTFN(5,("ucomwritecb: cc=%d\n", cc)); /* convert from USB bytes to tty bytes */ cc -= sc->sc_opkthdrlen; 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, l_start))(tp); splx(s); return; error: s = spltty(); CLR(tp->t_state, TS_BUSY); splx(s); } Static usbd_status ucomstartread(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(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)(int c, struct tty *tp) = LINESW(tp, l_rint); usbd_status err; u_int32_t cc; u_char *cp; int s; DPRINTFN(5,("ucomreadcb: status=%d\n", status)); if (status == USBD_CANCELLED || status == USBD_IOERROR || sc->sc_dying) { DPRINTF(("ucomreadcb: dying\n")); /* Send something to wake upper layer */ s = spltty(); (*rint)('\n', tp); ttwakeup(tp); splx(s); return; } if (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(struct ucom_softc *sc) { if (--sc->sc_open == 0) { DPRINTF(("ucom_cleanup: closing pipes\n")); ucom_shutdown(sc); 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; } 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; } if (sc->sc_ixfer != NULL) { usbd_free_xfer(sc->sc_ixfer); sc->sc_ixfer = NULL; } if (sc->sc_oxfer != NULL) { usbd_free_xfer(sc->sc_oxfer); sc->sc_oxfer = NULL; } } } #endif /* NUCOM > 0 */ int ucomprint(void *aux, const char *pnp) { struct ucom_attach_args *uca = aux; if (pnp) printf("ucom at %s", pnp); if (uca->portno != UCOM_UNK_PORTNO) printf(" portno %d", uca->portno); return (UNCONF); } int ucomsubmatch(struct device *parent, void *match, void *aux) { struct ucom_attach_args *uca = aux; struct cfdata *cf = match; 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)); }