/* $NetBSD: frodo.c,v 1.12 2002/09/27 20:31:45 thorpej Exp $ */ /*- * Copyright (c) 1997, 1998, 1999 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. * 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. */ /* * Copyright (c) 1997 Michael Smith. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Support for the "Frodo" (a.k.a. "Apollo Utility") chip found * in HP Apollo 9000/4xx workstations. */ #include __KERNEL_RCSID(0, "$NetBSD: frodo.c,v 1.12 2002/09/27 20:31:45 thorpej Exp $"); #define _HP300_INTR_H_PRIVATE #include #include #include #include #include #include #include #include #include #include #include /* * Description of a Frodo interrupt handler. */ struct frodo_interhand { int (*ih_fn) __P((void *)); void *ih_arg; int ih_priority; }; struct frodo_softc { struct device sc_dev; /* generic device glue */ volatile u_int8_t *sc_regs; /* register base */ struct frodo_interhand sc_intr[FRODO_NINTR]; /* interrupt handlers */ int sc_ipl; void *sc_ih; /* out interrupt cookie */ int sc_refcnt; /* number of interrupt refs */ }; int frodomatch __P((struct device *, struct cfdata *, void *)); void frodoattach __P((struct device *, struct device *, void *)); int frodoprint __P((void *, const char *)); int frodosubmatch __P((struct device *, struct cfdata *, void *)); int frodointr __P((void *)); void frodo_imask __P((struct frodo_softc *, u_int16_t, u_int16_t)); const struct cfattach frodo_ca = { sizeof(struct frodo_softc), frodomatch, frodoattach }; struct frodo_attach_args frodo_subdevs[] = { { "dnkbd", FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 }, { "apci", FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 }, { "apci", FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 }, { "apci", FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 }, { NULL, 0, 0 }, }; int frodomatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct intio_attach_args *ia = aux; static int frodo_matched = 0; /* only allow one instance */ if (frodo_matched) return (0); if (strcmp(ia->ia_modname, "frodo") != 0) return (0); if (badaddr((caddr_t)ia->ia_addr)) return (0); frodo_matched = 1; return (1); } void frodoattach(parent, self, aux) struct device *parent, *self; void *aux; { struct frodo_softc *sc = (struct frodo_softc *)self; struct intio_attach_args *ia = aux; int i; sc->sc_regs = (volatile u_int8_t *)ia->ia_addr; sc->sc_ipl = ia->ia_ipl; if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0) printf(": service mode enabled"); printf("\n"); /* Clear all of the interrupt handlers. */ memset(sc->sc_intr, 0, sizeof(sc->sc_intr)); sc->sc_refcnt = 0; /* * Disable all of the interrupt lines; we reenable them * as subdevices attach. */ frodo_imask(sc, 0, 0xffff); /* Clear any pending interrupts. */ FRODO_WRITE(sc, FRODO_PIC_PU, 0xff); FRODO_WRITE(sc, FRODO_PIC_PL, 0xff); /* Set interrupt polarities. */ FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10); /* ...and configure for edge triggering. */ FRODO_WRITE(sc, FRODO_PIO_IELR, 0xcf); /* * We defer hooking up our interrupt handler until * a subdevice hooks up theirs. */ sc->sc_ih = NULL; /* ... and attach subdevices. */ for (i = 0; frodo_subdevs[i].fa_name != NULL; i++) { /* * Skip the first serial port if we're not a 425e; * it's mapped to the DCA at select code 9 on all * other models. */ if (frodo_subdevs[i].fa_offset == FRODO_APCI_OFFSET(1) && mmuid != MMUID_425_E) continue; config_found_sm(self, &frodo_subdevs[i], frodoprint, frodosubmatch); } } int frodosubmatch(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct frodo_attach_args *fa = aux; if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET && cf->frodocf_offset != fa->fa_offset) return (0); return (config_match(parent, cf, aux)); } int frodoprint(aux, pnp) void *aux; const char *pnp; { struct frodo_attach_args *fa = aux; if (pnp) printf("%s at %s", fa->fa_name, pnp); printf(" offset 0x%x", fa->fa_offset); return (UNCONF); } void frodo_intr_establish(frdev, func, arg, line, priority) struct device *frdev; int (*func) __P((void *)); void *arg; int line; int priority; { struct frodo_softc *sc = (struct frodo_softc *)frdev; struct hp300_intrhand *ih = sc->sc_ih; if (line < 0 || line >= FRODO_NINTR) { printf("%s: bad interrupt line %d\n", sc->sc_dev.dv_xname, line); goto lose; } if (sc->sc_intr[line].ih_fn != NULL) { printf("%s: interrupt line %d already used\n", sc->sc_dev.dv_xname, line); goto lose; } /* Install the handler. */ sc->sc_intr[line].ih_fn = func; sc->sc_intr[line].ih_arg = arg; sc->sc_intr[line].ih_priority = priority; /* * If this is the first one, establish the frodo * interrupt handler. If not, reestablish at a * higher priority if necessary. */ if (ih == NULL || ih->ih_priority < priority) { if (ih != NULL) intr_disestablish(ih); sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, priority); } sc->sc_refcnt++; /* Enable the interrupt line. */ frodo_imask(sc, (1 << line), 0); return; lose: panic("frodo_intr_establish"); } void frodo_intr_disestablish(frdev, line) struct device *frdev; int line; { struct frodo_softc *sc = (struct frodo_softc *)frdev; struct hp300_intrhand *ih = sc->sc_ih; int newpri; if (sc->sc_intr[line].ih_fn == NULL) { printf("%s: no handler for line %d\n", sc->sc_dev.dv_xname, line); panic("frodo_intr_disestablish"); } sc->sc_intr[line].ih_fn = NULL; frodo_imask(sc, 0, (1 << line)); /* If this was the last, unhook ourselves. */ if (sc->sc_refcnt-- == 1) { intr_disestablish(ih); return; } /* Lower our priority, if appropriate. */ for (newpri = 0, line = 0; line < FRODO_NINTR; line++) if (sc->sc_intr[line].ih_fn != NULL && sc->sc_intr[line].ih_priority > newpri) newpri = sc->sc_intr[line].ih_priority; if (newpri != ih->ih_priority) { intr_disestablish(ih); sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, newpri); } } int frodointr(arg) void *arg; { struct frodo_softc *sc = arg; struct frodo_interhand *fih; int line, taken = 0; /* Any interrupts pending? */ if (FRODO_GETPEND(sc) == 0) return (0); do { /* * Get pending interrupt; this also clears it for us. */ line = FRODO_IPEND(sc); fih = &sc->sc_intr[line]; if (fih->ih_fn == NULL || (*fih->ih_fn)(fih->ih_arg) == 0) printf("%s: spurious interrupt on line %d\n", sc->sc_dev.dv_xname, line); if (taken++ > 100) panic("frodointr: looping!"); } while (FRODO_GETPEND(sc) != 0); return (1); } void frodo_imask(sc, set, clear) struct frodo_softc *sc; u_int16_t set, clear; { u_int16_t imask; imask = FRODO_GETMASK(sc); imask |= set; imask &= ~clear; FRODO_SETMASK(sc, imask); }