spkr_audio.c revision 1.3.6.2
1 /* $NetBSD: spkr_audio.c,v 1.3.6.2 2017/02/05 13:40:26 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2016 Nathanial Sloss <nathanialsloss (at) yahoo.com.au> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: spkr_audio.c,v 1.3.6.2 2017/02/05 13:40:26 skrll Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/errno.h> 36 #include <sys/device.h> 37 #include <sys/malloc.h> 38 #include <sys/uio.h> 39 #include <sys/proc.h> 40 #include <sys/ioctl.h> 41 #include <sys/conf.h> 42 #include <sys/condvar.h> 43 #include <sys/mutex.h> 44 #include <sys/kthread.h> 45 #include <sys/sysctl.h> 46 #include <dev/audio_if.h> 47 #include <dev/audiovar.h> 48 49 struct vbell_args { 50 u_int pitch; 51 u_int period; 52 u_int volume; 53 bool dying; 54 }; 55 56 static void bell_thread(void *) __dead; 57 58 #include <dev/audiobellvar.h> 59 60 #include <dev/spkrvar.h> 61 #include <dev/spkrio.h> 62 63 static int spkr_audio_probe(device_t, cfdata_t, void *); 64 static void spkr_audio_attach(device_t, device_t, void *); 65 static int spkr_audio_detach(device_t, int); 66 67 struct spkr_audio_softc { 68 struct spkr_softc sc_spkr; 69 lwp_t *sc_bellthread; 70 kmutex_t sc_bellock; 71 kcondvar_t sc_bellcv; 72 device_t sc_audiodev; 73 struct vbell_args sc_bell_args; 74 }; 75 76 CFATTACH_DECL_NEW(spkr_audio, sizeof(struct spkr_audio_softc), 77 spkr_audio_probe, spkr_audio_attach, spkr_audio_detach, NULL); 78 79 static void 80 spkr_audio_tone(device_t self, u_int xhz, u_int ticks) 81 { 82 struct spkr_audio_softc *sc = device_private(self); 83 84 #ifdef SPKRDEBUG 85 aprint_debug_dev(self, "%s: %u %d\n", __func__, xhz, ticks); 86 #endif /* SPKRDEBUG */ 87 audiobell(sc->sc_audiodev, xhz, ticks * (1000 / hz), 80, 0); 88 } 89 90 static void 91 spkr_audio_rest(device_t self, int ticks) 92 { 93 struct spkr_audio_softc *sc = device_private(self); 94 95 #ifdef SPKRDEBUG 96 aprint_debug_dev(self, "%s: %d\n", __func__, ticks); 97 #endif /* SPKRDEBUG */ 98 if (ticks > 0) 99 audiobell(sc->sc_audiodev, 0, ticks * (1000 / hz), 80, 0); 100 } 101 102 #ifdef notyet 103 static void 104 spkr_audio_play(device_t self, u_int pitch, u_int period, u_int volume) 105 { 106 struct spkr_audio_softc *sc = device_private(self); 107 108 mutex_enter(&sc->sc_bellock); 109 sc->sc_bell_args.dying = false; 110 sc->sc_bell_args.pitch = pitch; 111 sc->sc_bell_args.period = period; 112 sc->sc_bell_args.volume = volume; 113 114 cv_broadcast(&sc->sc_bellcv); 115 mutex_exit(&sc->sc_bellock); 116 } 117 #endif 118 119 static int 120 spkr_audio_probe(device_t parent, cfdata_t cf, void *aux) 121 { 122 123 return 1; 124 } 125 126 static void 127 spkr_audio_attach(device_t parent, device_t self, void *aux) 128 { 129 struct spkr_audio_softc *sc = device_private(self); 130 131 aprint_naive("\n"); 132 aprint_normal(": PC Speaker (synthesized)\n"); 133 134 sc->sc_audiodev = parent; 135 136 if (!pmf_device_register(self, NULL, NULL)) 137 aprint_error_dev(self, "couldn't establish power handler\n"); 138 mutex_init(&sc->sc_bellock, MUTEX_DEFAULT, IPL_SCHED); 139 cv_init(&sc->sc_bellcv, "bellcv"); 140 141 kthread_create(PRI_BIO, KTHREAD_MPSAFE | KTHREAD_MUSTJOIN, NULL, 142 bell_thread, sc, &sc->sc_bellthread, "%s", device_xname(self)); 143 144 spkr_attach(self, spkr_audio_tone, spkr_audio_rest); 145 } 146 147 static int 148 spkr_audio_detach(device_t self, int flags) 149 { 150 struct spkr_audio_softc *sc = device_private(self); 151 int error; 152 153 if ((error = spkr_detach(self, flags)) != 0) 154 return error; 155 156 pmf_device_deregister(self); 157 158 mutex_enter(&sc->sc_bellock); 159 sc->sc_bell_args.dying = true; 160 161 cv_broadcast(&sc->sc_bellcv); 162 mutex_exit(&sc->sc_bellock); 163 164 kthread_join(sc->sc_bellthread); 165 cv_destroy(&sc->sc_bellcv); 166 mutex_destroy(&sc->sc_bellock); 167 168 return 0; 169 } 170 171 static void 172 bell_thread(void *arg) 173 { 174 struct spkr_audio_softc *sc = arg; 175 struct vbell_args *vb = &sc->sc_bell_args; 176 u_int bpitch; 177 u_int bperiod; 178 u_int bvolume; 179 180 for (;;) { 181 mutex_enter(&sc->sc_bellock); 182 cv_wait_sig(&sc->sc_bellcv, &sc->sc_bellock); 183 184 if (vb->dying == true) { 185 mutex_exit(&sc->sc_bellock); 186 kthread_exit(0); 187 } 188 189 bpitch = vb->pitch; 190 bperiod = vb->period; 191 bvolume = vb->volume; 192 mutex_exit(&sc->sc_bellock); 193 audiobell(sc->sc_audiodev, bpitch, bperiod, bvolume, 0); 194 } 195 } 196
Indexes created Tue Oct 21 12:09:54 GMT 2025