attimer.c revision 1.1.8.2
1 1.1.8.2 yamt /* $NetBSD: attimer.c,v 1.1.8.2 2008/01/21 09:42:55 yamt Exp $ */ 2 1.1 cube 3 1.1 cube /* 4 1.1 cube * Copyright (c) 2005 The NetBSD Foundation. 5 1.1 cube * All rights reserved. 6 1.1 cube * 7 1.1 cube * Redistribution and use in source and binary forms, with or without 8 1.1 cube * modification, are permitted provided that the following conditions 9 1.1 cube * are met: 10 1.1 cube * 1. Redistributions of source code must retain the above copyright 11 1.1 cube * notice, this list of conditions and the following disclaimer. 12 1.1 cube * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 cube * notice, this list of conditions and the following disclaimer in the 14 1.1 cube * documentation and/or other materials provided with the distribution. 15 1.1.8.1 yamt * 3. Neither the name of The NetBSD Foundation nor the names of its 16 1.1 cube * contributors may be used to endorse or promote products derived 17 1.1 cube * from this software without specific prior written permission. 18 1.1 cube * 19 1.1 cube * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1 cube * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1 cube * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1 cube * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1 cube * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1 cube * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1 cube * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1 cube * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1 cube * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1 cube * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1 cube * POSSIBILITY OF SUCH DAMAGE. 30 1.1 cube */ 31 1.1 cube 32 1.1 cube /* 33 1.1 cube * AT Timer 34 1.1 cube * 35 1.1 cube * This code only allows control over the pitch of the speaker (pcppi(4)). 36 1.1 cube */ 37 1.1 cube 38 1.1 cube #include <sys/cdefs.h> 39 1.1.8.2 yamt __KERNEL_RCSID(0, "$NetBSD: attimer.c,v 1.1.8.2 2008/01/21 09:42:55 yamt Exp $"); 40 1.1 cube 41 1.1 cube #include <sys/param.h> 42 1.1 cube #include <sys/systm.h> 43 1.1 cube #include <sys/kernel.h> 44 1.1 cube #include <sys/device.h> 45 1.1 cube 46 1.1.8.1 yamt #include <sys/bus.h> 47 1.1 cube 48 1.1 cube #include <dev/isa/isareg.h> 49 1.1 cube 50 1.1 cube #include <dev/ic/attimervar.h> 51 1.1 cube #include <dev/ic/i8253reg.h> 52 1.1 cube 53 1.1 cube extern struct cfdriver attimer_cd; 54 1.1 cube 55 1.1 cube void 56 1.1 cube attimer_attach(struct attimer_softc *sc) 57 1.1 cube { 58 1.1 cube sc->sc_flags |= ATT_CONFIGURED; 59 1.1.8.2 yamt 60 1.1.8.2 yamt if (!pmf_device_register(&sc->sc_dev, NULL, NULL)) 61 1.1.8.2 yamt aprint_error_dev(&sc->sc_dev, "couldn't establish power handler\n"); 62 1.1.8.2 yamt } 63 1.1.8.2 yamt 64 1.1.8.2 yamt int 65 1.1.8.2 yamt attimer_detach(device_t self, int flags) 66 1.1.8.2 yamt { 67 1.1.8.2 yamt struct attimer_softc *sc = device_private(self); 68 1.1.8.2 yamt 69 1.1.8.2 yamt pmf_device_deregister(self); 70 1.1.8.2 yamt sc->sc_flags &= ~ATT_CONFIGURED; 71 1.1.8.2 yamt bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_size); 72 1.1.8.2 yamt return 0; 73 1.1 cube } 74 1.1 cube 75 1.1 cube /* 76 1.1 cube * This is slightly artificial. While the code looks fine, I can't help 77 1.1 cube * but pray I'll get the attimer object associated to the pcppi object 78 1.1 cube * that calls the routine. 79 1.1 cube * 80 1.1 cube * There's not much at risk here, as there's about no chance to have a 81 1.1 cube * computer with more than one pcppi/attimer accessible. 82 1.1 cube */ 83 1.1 cube 84 1.1 cube struct attimer_softc * 85 1.1.8.2 yamt attimer_attach_speaker(void) 86 1.1 cube { 87 1.1 cube int i; 88 1.1 cube struct attimer_softc *sc; 89 1.1 cube 90 1.1.8.2 yamt for (i = 0; i < attimer_cd.cd_ndevs; i++) { 91 1.1.8.2 yamt if (attimer_cd.cd_devs[i] == NULL) 92 1.1.8.2 yamt continue; 93 1.1.8.2 yamt sc = (struct attimer_softc *)attimer_cd.cd_devs[i]; 94 1.1.8.2 yamt if ((sc->sc_flags & ATT_CONFIGURED) && 95 1.1.8.2 yamt !(sc->sc_flags & ATT_ATTACHED)) { 96 1.1.8.2 yamt sc->sc_flags |= ATT_ATTACHED; 97 1.1.8.2 yamt return sc; 98 1.1 cube } 99 1.1.8.2 yamt } 100 1.1 cube return NULL; 101 1.1 cube } 102 1.1 cube 103 1.1 cube void 104 1.1 cube attimer_set_pitch(struct attimer_softc *sc, int pitch) 105 1.1 cube { 106 1.1 cube int s; 107 1.1 cube s = splhigh(); 108 1.1 cube bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_MODE, 109 1.1 cube TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE); 110 1.1 cube bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2, 111 1.1 cube TIMER_DIV(pitch) % 256); 112 1.1 cube bus_space_write_1(sc->sc_iot, sc->sc_ioh, TIMER_CNTR2, 113 1.1 cube TIMER_DIV(pitch) / 256); 114 1.1 cube splx(s); 115 1.1 cube } 116
Indexes created Mon Oct 13 21:09:55 GMT 2025