spkr_pcppi.c revision 1.9
1/* $NetBSD: spkr_pcppi.c,v 1.9 2017/01/06 09:32:08 pgoyette Exp $ */ 2 3/* 4 * Copyright (c) 1990 Eric S. Raymond (esr@snark.thyrsus.com) 5 * Copyright (c) 1990 Andrew A. Chernov (ache@astral.msk.su) 6 * Copyright (c) 1990 Lennart Augustsson (lennart@augustsson.net) 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Eric S. Raymond 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 32 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36/* 37 * spkr.c -- device driver for console speaker on 80386 38 * 39 * v1.1 by Eric S. Raymond (esr@snark.thyrsus.com) Feb 1990 40 * modified for 386bsd by Andrew A. Chernov <ache@astral.msk.su> 41 * 386bsd only clean version, all SYSV stuff removed 42 * use hz value from param.c 43 */ 44 45#include <sys/cdefs.h> 46__KERNEL_RCSID(0, "$NetBSD: spkr_pcppi.c,v 1.9 2017/01/06 09:32:08 pgoyette Exp $"); 47 48#include <sys/param.h> 49#include <sys/systm.h> 50#include <sys/kernel.h> 51#include <sys/errno.h> 52#include <sys/device.h> 53#include <sys/malloc.h> 54#include <sys/uio.h> 55#include <sys/proc.h> 56#include <sys/ioctl.h> 57#include <sys/conf.h> 58 59#include <sys/bus.h> 60 61#include <dev/isa/pcppivar.h> 62 63#include <dev/spkrvar.h> 64#include <dev/spkrio.h> 65 66struct spkr_pcppi_softc { 67 struct spkr_softc sc_spkr; 68 pcppi_tag_t sc_pcppicookie; 69}; 70 71static int spkr_pcppi_probe(device_t, cfdata_t, void *); 72static void spkr_pcppi_attach(device_t, device_t, void *); 73static int spkr_pcppi_detach(device_t, int); 74 75CFATTACH_DECL_NEW(spkr_pcppi, sizeof(struct spkr_pcppi_softc), 76 spkr_pcppi_probe, spkr_pcppi_attach, spkr_pcppi_detach, NULL); 77 78#define SPKRPRI (PZERO - 1) 79 80/* emit tone of frequency hz for given number of ticks */ 81static void 82spkr_pcppi_tone(device_t self, u_int xhz, u_int ticks) 83{ 84#ifdef SPKRDEBUG 85 aprint_debug_dev(self, "%s: %u %u\n", __func__, xhz, ticks); 86#endif /* SPKRDEBUG */ 87 struct spkr_pcppi_softc *sc = device_private(self); 88 pcppi_bell(sc->sc_pcppicookie, xhz, ticks, PCPPI_BELL_SLEEP); 89} 90 91/* rest for given number of ticks */ 92static void 93spkr_pcppi_rest(device_t self, int ticks) 94{ 95 /* 96 * Set timeout to endrest function, then give up the timeslice. 97 * This is so other processes can execute while the rest is being 98 * waited out. 99 */ 100#ifdef SPKRDEBUG 101 aprint_debug_dev(self, "%s: %d\n", __func__, ticks); 102#endif /* SPKRDEBUG */ 103 if (ticks > 0) 104 tsleep(self, SPKRPRI | PCATCH, device_xname(self), ticks); 105} 106 107static int 108spkr_pcppi_probe(device_t parent, cfdata_t cf, void *aux) 109{ 110 return 1; 111} 112 113static void 114spkr_pcppi_attach(device_t parent, device_t self, void *aux) 115{ 116 struct pcppi_attach_args *pa = aux; 117 struct spkr_pcppi_softc *sc = device_private(self); 118 119 aprint_naive("\n"); 120 aprint_normal(": PC Speaker\n"); 121 122 sc->sc_pcppicookie = pa->pa_cookie; 123 spkr_attach(self, spkr_pcppi_tone, spkr_pcppi_rest); 124 if (!pmf_device_register(self, NULL, NULL)) 125 aprint_error_dev(self, "couldn't establish power handler\n"); 126} 127 128static int 129spkr_pcppi_detach(device_t self, int flags) 130{ 131 struct spkr_pcppi_softc *sc = device_private(self); 132 int error; 133 134 if ((error = spkr_detach(self, flags)) != 0) 135 return error; 136 137 sc->sc_pcppicookie = NULL; 138 pmf_device_deregister(self); 139 return 0; 140} 141