/* $OpenBSD: dl.c,v 1.12 2010/07/02 17:27:01 nicm Exp $ */ /* $NetBSD: dl.c,v 1.11 2000/01/24 02:40:29 matt Exp $ */ /*- * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1997 Ben Harris. All rights reserved. * Copyright (c) 1996 Ken C. Wellsch. All rights reserved. * Copyright (c) 1982, 1986, 1990, 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell and Rick Macklem. * * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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. */ /* * dl.c -- Device driver for the DL11 and DLV11 serial cards. * * OS-interface code derived from the dz and dca (hp300) drivers. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct dl_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; struct tty *sc_tty; }; static int dl_match(struct device *, struct cfdata *, void *); static void dl_attach(struct device *, struct device *, void *); static void dlrint(void *); static void dlxint(void *); static void dlstart(struct tty *); static int dlparam(struct tty *, struct termios *); static void dlbrk(struct dl_softc *, int); struct tty * dltty(dev_t); int dlopen(dev_t, int, int, struct proc *); int dlclose(dev_t, int, int, struct proc *); int dlread(dev_t, struct uio *, int); int dlwrite(dev_t, struct uio *, int); int dlioctl(dev_t, int, caddr_t, int, struct proc *); void dlstop(struct tty *, int); struct cfattach dl_ca = { sizeof(struct dl_softc), (cfmatch_t)dl_match, dl_attach }; struct cfdriver dl_cd = { NULL, "dl", DV_TTY }; #define DL_READ_WORD(reg) \ bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg) #define DL_WRITE_WORD(reg, val) \ bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val) #define DL_WRITE_BYTE(reg, val) \ bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val) /* Autoconfig handles: setup the controller to interrupt, */ /* then complete the housecleaning for full operation */ static int dl_match (parent, cf, aux) struct device * parent; struct cfdata *cf; void *aux; { struct uba_attach_args *ua = aux; #ifdef DL_DEBUG printf("Probing for dl at %lo ... ", (long)ua->ua_iaddr); #endif bus_space_write_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR, DL_XCSR_TXIE); if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { #ifdef DL_DEBUG printf("failed (step 1; XCSR = %.4b)\n", bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), DL_XCSR_BITS); #endif return 0; } /* * We have to force an interrupt so the uba driver can work * out where we are. Unfortunately, the only way to make a * DL11 interrupt is to get it to send or receive a * character. We'll send a NUL and hope it doesn't hurt * anything. */ bus_space_write_1(ua->ua_iot, ua->ua_ioh, DL_UBA_XBUFL, '\0'); #if 0 /* This test seems to fail 2/3 of the time :-( */ if (dladdr->dl_xcsr != (DL_XCSR_TXIE)) { #ifdef DL_DEBUG printf("failed (step 2; XCSR = %.4b)\n", dladdr->dl_xcsr, DL_XCSR_BITS); #endif return 0; } #endif DELAY(100000); /* delay 1/10 s for character to transmit */ if (bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR) != (DL_XCSR_TXIE | DL_XCSR_TX_READY)) { #ifdef DL_DEBUG printf("failed (step 3; XCSR = %.4b)\n", bus_space_read_2(ua->ua_iot, ua->ua_ioh, DL_UBA_XCSR), DL_XCSR_BITS); #endif return 0; } /* What else do I need to do? */ return 1; } static void dl_attach (parent, self, aux) struct device *parent, *self; void *aux; { struct dl_softc *sc = (void *)self; register struct uba_attach_args *ua = aux; sc->sc_iot = ua->ua_iot; sc->sc_ioh = ua->ua_ioh; /* Tidy up the device */ DL_WRITE_WORD(DL_UBA_RCSR, DL_RCSR_RXIE); DL_WRITE_WORD(DL_UBA_XCSR, DL_XCSR_TXIE); /* Initialize our softc structure. Should be done in open? */ sc->sc_tty = ttymalloc(0); /* Now register the TX & RX interrupt handlers */ uba_intr_establish(ua->ua_icookie, ua->ua_cvec , dlxint, sc); uba_intr_establish(ua->ua_icookie, ua->ua_cvec - 4, dlrint, sc); printf("\n"); } /* Receiver Interrupt Handler */ static void dlrint(arg) void *arg; { struct dl_softc *sc = arg; register struct tty *tp; register int cc; register unsigned c; if (DL_READ_WORD(DL_UBA_RCSR) & DL_RCSR_RX_DONE) { c = DL_READ_WORD(DL_UBA_RBUF); cc = c & 0xFF; tp = sc->sc_tty; if (!(tp->t_state & TS_ISOPEN)) { wakeup((caddr_t)&tp->t_rawq); return; } if (c & DL_RBUF_OVERRUN_ERR) /* * XXX: This should really be logged somwhere * else where we can afford the time. */ log(LOG_WARNING, "%s: rx overrun\n", sc->sc_dev.dv_xname); if (c & DL_RBUF_FRAMING_ERR) cc |= TTY_FE; if (c & DL_RBUF_PARITY_ERR) cc |= TTY_PE; (*linesw[tp->t_line].l_rint)(cc, tp); } else log(LOG_WARNING, "%s: stray rx interrupt\n", sc->sc_dev.dv_xname); return; } /* Transmitter Interrupt Handler */ static void dlxint(arg) void *arg; { struct dl_softc *sc = arg; register struct tty *tp; tp = sc->sc_tty; tp->t_state &= ~(TS_BUSY | TS_FLUSH); if (tp->t_line) (*linesw[tp->t_line].l_start)(tp); else dlstart(tp); return; } int dlopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { register struct tty *tp; register int unit; struct dl_softc *sc; unit = minor(dev); if (unit >= dl_cd.cd_ndevs || dl_cd.cd_devs[unit] == NULL) return ENXIO; sc = dl_cd.cd_devs[unit]; tp = sc->sc_tty; if (tp == NULL) return ENODEV; tp->t_oproc = dlstart; tp->t_param = dlparam; tp->t_dev = dev; if (!(tp->t_state & TS_ISOPEN)) { ttychars(tp); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; /* No modem control, so set CLOCAL. */ tp->t_cflag = TTYDEF_CFLAG | CLOCAL; tp->t_lflag = TTYDEF_LFLAG; tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; dlparam(tp, &tp->t_termios); ttsetwater(tp); } else if ((tp->t_state & TS_XCLUDE) && suser(p, 0) != 0) return EBUSY; return ((*linesw[tp->t_line].l_open)(dev, tp, p)); } /*ARGSUSED*/ int dlclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { struct dl_softc *sc; register struct tty *tp; register int unit; unit = minor(dev); sc = dl_cd.cd_devs[unit]; tp = sc->sc_tty; (*linesw[tp->t_line].l_close)(tp, flag, p); /* Make sure a BREAK state is not left enabled. */ dlbrk(sc, 0); return (ttyclose(tp)); } int dlread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { register struct tty *tp; struct dl_softc *sc; register int unit; unit = minor(dev); sc = dl_cd.cd_devs[unit]; tp = sc->sc_tty; return ((*linesw[tp->t_line].l_read)(tp, uio, flag)); } int dlwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { register struct tty *tp; struct dl_softc *sc; register int unit; unit = minor(dev); sc = dl_cd.cd_devs[unit]; tp = sc->sc_tty; return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); } int dlioctl(dev, cmd, data, flag, p) dev_t dev; int cmd; caddr_t data; int flag; struct proc *p; { struct dl_softc *sc; register struct tty *tp; register int unit; int error; unit = minor(dev); sc = dl_cd.cd_devs[unit]; tp = sc->sc_tty; 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); switch (cmd) { case TIOCSBRK: dlbrk(sc, 1); break; case TIOCCBRK: dlbrk(sc, 0); break; case TIOCMGET: /* No modem control, assume they're all low. */ *(int *)data = 0; break; default: return (ENOTTY); } return (0); } struct tty * dltty(dev) dev_t dev; { register struct dl_softc* sc; sc = dl_cd.cd_devs[minor(dev)]; return sc->sc_tty; } void dlstop(tp, flag) register struct tty *tp; int flag; { register struct dl_softc *sc; int unit, s; unit = minor(tp->t_dev); sc = dl_cd.cd_devs[unit]; s = spltty(); if (tp->t_state & TS_BUSY) if (!(tp->t_state & TS_TTSTOP)) tp->t_state |= TS_FLUSH; splx(s); } static void dlstart(tp) register struct tty *tp; { register struct dl_softc *sc; register int unit; int s; unit = minor(tp->t_dev); sc = dl_cd.cd_devs[unit]; s = spltty(); if (tp->t_state & (TS_TIMEOUT|TS_BUSY|TS_TTSTOP)) goto out; ttwakeupwr(tp); if (tp->t_outq.c_cc == 0) goto out; if (DL_READ_WORD(DL_UBA_XCSR) & DL_XCSR_TX_READY) { tp->t_state |= TS_BUSY; DL_WRITE_BYTE(DL_UBA_XBUFL, getc(&tp->t_outq)); } out: splx(s); return; } /*ARGSUSED*/ static int dlparam(tp, t) register struct tty *tp; register struct termios *t; { /* * All this kind of stuff (speed, character format, whatever) * is set by jumpers on the card. Changing it is thus rather * tricky for a mere device driver. */ return 0; } static void dlbrk(sc, state) register struct dl_softc *sc; int state; { int s = spltty(); if (state) { DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) | DL_XCSR_TX_BREAK); } else { DL_WRITE_WORD(DL_UBA_XCSR, DL_READ_WORD(DL_UBA_XCSR) & ~DL_XCSR_TX_BREAK); } splx(s); }