spkr_pcppi.c revision 1.4
1/* $NetBSD: spkr_pcppi.c,v 1.4 2016/12/09 05:17:03 christos 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 1.4 2016/12/09 05:17:03 christos 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/module.h> 55#include <sys/uio.h> 56#include <sys/proc.h> 57#include <sys/ioctl.h> 58#include <sys/conf.h> 59 60#include <sys/bus.h> 61 62#include <dev/isa/pcppivar.h> 63 64#include <dev/spkrvar.h> 65#include <dev/spkrio.h> 66 67extern int spkr_attached; 68static void spkrattach(device_t, device_t, void *); 69static int spkrdetach(device_t, int); 70 71#include "ioconf.h" 72 73MODULE(MODULE_CLASS_DRIVER, spkr, NULL /* "pcppi" */); 74 75static int 76spkr_modcmd(modcmd_t cmd, void *arg) 77{ 78 return spkr__modcmd(cmd, arg); 79} 80 81CFATTACH_DECL_NEW(spkr_pcppi, 0, spkr_probe, spkrattach, spkrdetach, NULL); 82 83static pcppi_tag_t ppicookie; 84 85#define SPKRPRI (PZERO - 1) 86 87void 88spkr_tone(u_int xhz, u_int ticks) 89/* emit tone of frequency hz for given number of ticks */ 90{ 91 pcppi_bell(ppicookie, xhz, ticks, PCPPI_BELL_SLEEP); 92} 93 94void 95spkr_rest(int ticks) 96/* rest for given number of ticks */ 97{ 98 /* 99 * Set timeout to endrest function, then give up the timeslice. 100 * This is so other processes can execute while the rest is being 101 * waited out. 102 */ 103#ifdef SPKRDEBUG 104 printf("%s: %d\n", __func__, ticks); 105#endif /* SPKRDEBUG */ 106 if (ticks > 0) 107 tsleep(spkr_rest, SPKRPRI | PCATCH, "rest", ticks); 108} 109 110static void 111spkrattach(device_t parent, device_t self, void *aux) 112{ 113 aprint_naive("\n"); 114 aprint_normal("\n"); 115 ppicookie = ((struct pcppi_attach_args *)aux)->pa_cookie; 116 spkr_attached = 1; 117 if (!pmf_device_register(self, NULL, NULL)) 118 aprint_error_dev(self, "couldn't establish power handler\n"); 119} 120 121static int 122spkrdetach(device_t self, int flags) 123{ 124 125 pmf_device_deregister(self); 126 spkr_attached = 0; 127 ppicookie = NULL; 128 129 return 0; 130} 131