spkr_pcppi.c revision 1.1
1 /* $NetBSD: spkr_pcppi.c,v 1.1 2016/12/09 02:22:34 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1990 Eric S. Raymond (esr (at) snark.thyrsus.com) 5 * Copyright (c) 1990 Andrew A. Chernov (ache (at) astral.msk.su) 6 * Copyright (c) 1990 Lennart Augustsson (lennart (at) 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 (at) snark.thyrsus.com) Feb 1990 40 * modified for 386bsd by Andrew A. Chernov <ache (at) 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 1.1 2016/12/09 02:22:34 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/isa/spkrio.h> 65 66 void spkrattach(device_t, device_t, void *); 67 int spkrdetach(device_t, int); 68 int spkrprobe(device_t, cfdata_t, void *); 69 70 #include "ioconf.h" 71 72 MODULE(MODULE_CLASS_DRIVER, spkr, NULL /* "pcppi" */); 73 74 #ifdef _MODULE 75 #include "ioconf.c" 76 #endif 77 78 CFATTACH_DECL_NEW(spkr_pcppi, 0, spkrprobe, spkrattach, spkrdetach, NULL); 79 80 static pcppi_tag_t ppicookie; 81 82 #define SPKRPRI (PZERO - 1) 83 84 void 85 spkr_tone(u_int xhz, u_int ticks) 86 /* emit tone of frequency hz for given number of ticks */ 87 { 88 pcppi_bell(ppicookie, xhz, ticks, PCPPI_BELL_SLEEP); 89 } 90 91 void 92 spkr_rest(int ticks) 93 /* rest for given number of 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 printf("%s: %d\n", __func__, ticks); 102 #endif /* SPKRDEBUG */ 103 if (ticks > 0) 104 tsleep(spkr_rest, SPKRPRI | PCATCH, "rest", ticks); 105 } 106 107 extern int spkr_active; /* exclusion flag */ 108 extern const struct cdevsw spkr_cdevsw; 109 110 int spkr_attached = 0; 111 112 int 113 spkrprobe(device_t parent, cfdata_t match, void *aux) 114 { 115 return (!spkr_attached); 116 } 117 118 void 119 spkrattach(device_t parent, device_t self, void *aux) 120 { 121 aprint_naive("\n"); 122 aprint_normal("\n"); 123 ppicookie = ((struct pcppi_attach_args *)aux)->pa_cookie; 124 spkr_attached = 1; 125 if (!pmf_device_register(self, NULL, NULL)) 126 aprint_error_dev(self, "couldn't establish power handler\n"); 127 } 128 129 int 130 spkrdetach(device_t self, int flags) 131 { 132 133 pmf_device_deregister(self); 134 spkr_attached = 0; 135 ppicookie = NULL; 136 137 return 0; 138 } 139 140 141 static int 142 spkr_modcmd(modcmd_t cmd, void *arg) 143 { 144 #ifdef _MODULE 145 devmajor_t bmajor, cmajor; 146 #endif 147 int error = 0; 148 149 #ifdef _MODULE 150 switch(cmd) { 151 case MODULE_CMD_INIT: 152 bmajor = cmajor = -1; 153 error = devsw_attach(spkr_cd.cd_name, NULL, &bmajor, 154 &spkr_cdevsw, &cmajor); 155 if (error) 156 break; 157 158 error = config_init_component(cfdriver_ioconf_spkr, 159 cfattach_ioconf_spkr, cfdata_ioconf_spkr); 160 if (error) { 161 devsw_detach(NULL, &spkr_cdevsw); 162 } 163 break; 164 165 case MODULE_CMD_FINI: 166 if (spkr_active) 167 return EBUSY; 168 error = config_fini_component(cfdriver_ioconf_spkr, 169 cfattach_ioconf_spkr, cfdata_ioconf_spkr); 170 devsw_detach(NULL, &spkr_cdevsw); 171 break; 172 default: 173 error = ENOTTY; 174 break; 175 } 176 #endif 177 178 return error; 179 } 180
Indexes created Thu Sep 25 08:09:54 GMT 2025