spkr_pcppi.c revision 1.2
1/* $NetBSD: spkr_pcppi.c,v 1.2 2016/12/09 04:32:39 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 1.2 2016/12/09 04:32:39 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/spkrio.h> 65 66extern int spkr_attached; 67static void spkrattach(device_t, device_t, void *); 68static int spkrdetach(device_t, int); 69 70#include "ioconf.h" 71 72MODULE(MODULE_CLASS_DRIVER, spkr, NULL /* "pcppi" */); 73 74static int 75spkr_modcmd(modcmd_t cmd, void *arg) 76{ 77 return spkr__modcmd(cmd, arg); 78} 79 80#ifdef _MODULE 81#include "ioconf.c" 82#endif 83 84CFATTACH_DECL_NEW(spkr_pcppi, 0, spkr_probe, spkrattach, spkrdetach, NULL); 85 86static pcppi_tag_t ppicookie; 87 88#define SPKRPRI (PZERO - 1) 89 90void 91spkr_tone(u_int xhz, u_int ticks) 92/* emit tone of frequency hz for given number of ticks */ 93{ 94 pcppi_bell(ppicookie, xhz, ticks, PCPPI_BELL_SLEEP); 95} 96 97void 98spkr_rest(int ticks) 99/* rest for given number of ticks */ 100{ 101 /* 102 * Set timeout to endrest function, then give up the timeslice. 103 * This is so other processes can execute while the rest is being 104 * waited out. 105 */ 106#ifdef SPKRDEBUG 107 printf("%s: %d\n", __func__, ticks); 108#endif /* SPKRDEBUG */ 109 if (ticks > 0) 110 tsleep(spkr_rest, SPKRPRI | PCATCH, "rest", ticks); 111} 112 113static void 114spkrattach(device_t parent, device_t self, void *aux) 115{ 116 aprint_naive("\n"); 117 aprint_normal("\n"); 118 ppicookie = ((struct pcppi_attach_args *)aux)->pa_cookie; 119 spkr_attached = 1; 120 if (!pmf_device_register(self, NULL, NULL)) 121 aprint_error_dev(self, "couldn't establish power handler\n"); 122} 123 124static int 125spkrdetach(device_t self, int flags) 126{ 127 128 pmf_device_deregister(self); 129 spkr_attached = 0; 130 ppicookie = NULL; 131 132 return 0; 133} 134