/* $NetBSD: attimer.c,v 1.2 2005/12/11 12:21:26 christos Exp $ */ /* * Copyright (c) 2005 The NetBSD Foundation. * All rights reserved. * * This code is derived from software contributed to the NetBSD Foundation * by Quentin Garnier. * * 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. */ /* * AT Timer * * This code only allows control over the pitch of the speaker (pcppi(4)). */ #include __KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.2 2005/12/11 12:21:26 christos Exp $"); #include #include #include #include #include #include #include #include extern struct cfdriver attimer_cd; void attimer_attach(struct attimer_softc *sc) { sc->sc_flags |= ATT_CONFIGURED; } /* * This is slightly artificial. While the code looks fine, I can't help * but pray I'll get the attimer object associated to the pcppi object * that calls the routine. * * There's not much at risk here, as there's about no chance to have a * computer with more than one pcppi/attimer accessible. */ struct attimer_softc * attimer_attach_speaker() { int i; struct attimer_softc *sc; for (i = 0; i < attimer_cd.cd_ndevs; i++) if (attimer_cd.cd_devs[i] != NULL) { sc = (struct attimer_softc *)attimer_cd.cd_devs[i]; if ((sc->sc_flags & ATT_CONFIGURED) && !(sc->sc_flags & ATT_ATTACHED)) { sc->sc_flags |= ATT_ATTACHED; return sc; } } return NULL; } void attimer_set_pitch(struct attimer_softc *sc, int pitch) { int s; s = splhigh(); bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE, TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2, TIMER_DIV(pitch) % 256); bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2, TIMER_DIV(pitch) / 256); splx(s); }