attimer.c revision 1.1.6.2
1 1.1.6.2 kent /* $NetBSD: attimer.c,v 1.1.6.2 2005/04/29 11:28:49 kent Exp $ */ 2 1.1.6.2 kent 3 1.1.6.2 kent /* 4 1.1.6.2 kent * Copyright (c) 2005 The NetBSD Foundation. 5 1.1.6.2 kent * All rights reserved. 6 1.1.6.2 kent * 7 1.1.6.2 kent * This code is derived from software contributed to the NetBSD Foundation 8 1.1.6.2 kent * by Quentin Garnier. 9 1.1.6.2 kent * 10 1.1.6.2 kent * Redistribution and use in source and binary forms, with or without 11 1.1.6.2 kent * modification, are permitted provided that the following conditions 12 1.1.6.2 kent * are met: 13 1.1.6.2 kent * 1. Redistributions of source code must retain the above copyright 14 1.1.6.2 kent * notice, this list of conditions and the following disclaimer. 15 1.1.6.2 kent * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.6.2 kent * notice, this list of conditions and the following disclaimer in the 17 1.1.6.2 kent * documentation and/or other materials provided with the distribution. 18 1.1.6.2 kent * 3. All advertising materials mentioning features or use of this software 19 1.1.6.2 kent * must display the following acknowledgement: 20 1.1.6.2 kent * This product includes software developed by the NetBSD 21 1.1.6.2 kent * Foundation, Inc. and its contributors. 22 1.1.6.2 kent * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1.6.2 kent * contributors may be used to endorse or promote products derived 24 1.1.6.2 kent * from this software without specific prior written permission. 25 1.1.6.2 kent * 26 1.1.6.2 kent * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1.6.2 kent * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1.6.2 kent * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1.6.2 kent * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1.6.2 kent * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1.6.2 kent * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1.6.2 kent * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1.6.2 kent * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1.6.2 kent * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1.6.2 kent * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1.6.2 kent * POSSIBILITY OF SUCH DAMAGE. 37 1.1.6.2 kent */ 38 1.1.6.2 kent 39 1.1.6.2 kent /* 40 1.1.6.2 kent * AT Timer 41 1.1.6.2 kent * 42 1.1.6.2 kent * This code only allows control over the pitch of the speaker (pcppi(4)). 43 1.1.6.2 kent */ 44 1.1.6.2 kent 45 1.1.6.2 kent #include <sys/cdefs.h> 46 1.1.6.2 kent __KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.1.6.2 2005/04/29 11:28:49 kent Exp $"); 47 1.1.6.2 kent 48 1.1.6.2 kent #include <sys/param.h> 49 1.1.6.2 kent #include <sys/systm.h> 50 1.1.6.2 kent #include <sys/kernel.h> 51 1.1.6.2 kent #include <sys/device.h> 52 1.1.6.2 kent 53 1.1.6.2 kent #include <machine/bus.h> 54 1.1.6.2 kent 55 1.1.6.2 kent #include <dev/isa/isareg.h> 56 1.1.6.2 kent 57 1.1.6.2 kent #include <dev/ic/attimervar.h> 58 1.1.6.2 kent #include <dev/ic/i8253reg.h> 59 1.1.6.2 kent 60 1.1.6.2 kent extern struct cfdriver attimer_cd; 61 1.1.6.2 kent 62 1.1.6.2 kent void 63 1.1.6.2 kent attimer_attach(struct attimer_softc *sc) 64 1.1.6.2 kent { 65 1.1.6.2 kent sc->sc_flags |= ATT_CONFIGURED; 66 1.1.6.2 kent } 67 1.1.6.2 kent 68 1.1.6.2 kent /* 69 1.1.6.2 kent * This is slightly artificial. While the code looks fine, I can't help 70 1.1.6.2 kent * but pray I'll get the attimer object associated to the pcppi object 71 1.1.6.2 kent * that calls the routine. 72 1.1.6.2 kent * 73 1.1.6.2 kent * There's not much at risk here, as there's about no chance to have a 74 1.1.6.2 kent * computer with more than one pcppi/attimer accessible. 75 1.1.6.2 kent */ 76 1.1.6.2 kent 77 1.1.6.2 kent struct attimer_softc * 78 1.1.6.2 kent attimer_attach_speaker() 79 1.1.6.2 kent { 80 1.1.6.2 kent int i; 81 1.1.6.2 kent struct attimer_softc *sc; 82 1.1.6.2 kent 83 1.1.6.2 kent for (i = 0; i < attimer_cd.cd_ndevs; i++) 84 1.1.6.2 kent if (attimer_cd.cd_devs[i] != NULL) { 85 1.1.6.2 kent sc = (struct attimer_softc *)attimer_cd.cd_devs[i]; 86 1.1.6.2 kent if ((sc->sc_flags & ATT_CONFIGURED) && 87 1.1.6.2 kent !(sc->sc_flags & ATT_ATTACHED)) { 88 1.1.6.2 kent sc->sc_flags |= ATT_ATTACHED; 89 1.1.6.2 kent return sc; 90 1.1.6.2 kent } 91 1.1.6.2 kent } 92 1.1.6.2 kent return NULL; 93 1.1.6.2 kent } 94 1.1.6.2 kent 95 1.1.6.2 kent void 96 1.1.6.2 kent attimer_set_pitch(struct attimer_softc *sc, int pitch) 97 1.1.6.2 kent { 98 1.1.6.2 kent int s; 99 1.1.6.2 kent s = splhigh(); 100 1.1.6.2 kent bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE, 101 1.1.6.2 kent TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); 102 1.1.6.2 kent bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2, 103 1.1.6.2 kent TIMER_DIV(pitch) % 256); 104 1.1.6.2 kent bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2, 105 1.1.6.2 kent TIMER_DIV(pitch) / 256); 106 1.1.6.2 kent splx(s); 107 1.1.6.2 kent } 108
Indexes created Tue Oct 14 01:09:49 GMT 2025