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spkr_pcppi.c revision 1.7 
      1 /*	$NetBSD: spkr_pcppi.c,v 1.7 2016/12/14 22:30:42 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 1.7 2016/12/14 22:30:42 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 
     67 struct spkr_pcppi_softc {
     68 	struct spkr_softc sc_spkr;
     69 	pcppi_tag_t sc_pcppicookie;
     70 };
     71 
     72 static int spkr_pcppi_probe(device_t, cfdata_t, void *);
     73 static void spkr_pcppi_attach(device_t, device_t, void *);
     74 static int spkr_pcppi_detach(device_t, int);
     75 
     76 CFATTACH_DECL_NEW(spkr_pcppi, sizeof(struct spkr_pcppi_softc),
     77     spkr_pcppi_probe, spkr_pcppi_attach, spkr_pcppi_detach, NULL);
     78 
     79 MODULE(MODULE_CLASS_DRIVER, spkr, NULL /* "pcppi" */);
     80 
     81 static int
     82 spkr_modcmd(modcmd_t cmd, void *arg)
     83 {
     84 	return spkr__modcmd(cmd, arg);
     85 }
     86 
     87 #define SPKRPRI (PZERO - 1)
     88 
     89 /* emit tone of frequency hz for given number of ticks */
     90 static void
     91 spkr_pcppi_tone(device_t self, u_int xhz, u_int ticks)
     92 {
     93 #ifdef SPKRDEBUG
     94 	aprint_debug_dev(self, "%s: %u %u\n", __func__, xhz, ticks);
     95 #endif /* SPKRDEBUG */
     96 	struct spkr_pcppi_softc *sc = device_private(self);
     97 	pcppi_bell(sc->sc_pcppicookie, xhz, ticks, PCPPI_BELL_SLEEP);
     98 }
     99 
    100 /* rest for given number of ticks */
    101 static void
    102 spkr_pcppi_rest(device_t self, int ticks)
    103 {
    104 	/*
    105 	 * Set timeout to endrest function, then give up the timeslice.
    106 	 * This is so other processes can execute while the rest is being
    107 	 * waited out.
    108 	 */
    109 #ifdef SPKRDEBUG
    110 	aprint_debug_dev(self, "%s: %d\n", __func__, ticks);
    111 #endif /* SPKRDEBUG */
    112 	if (ticks > 0)
    113 		tsleep(self, SPKRPRI | PCATCH, device_xname(self), ticks);
    114 }
    115 
    116 static int
    117 spkr_pcppi_probe(device_t parent, cfdata_t cf, void *aux)
    118 {
    119 	return 1;
    120 }
    121 
    122 static void
    123 spkr_pcppi_attach(device_t parent, device_t self, void *aux)
    124 {
    125 	struct pcppi_attach_args *pa = aux;
    126 	struct spkr_pcppi_softc *sc = device_private(self);
    127 
    128 	aprint_naive("\n");
    129 	aprint_normal(": PC Speaker\n");
    130 
    131 	sc->sc_pcppicookie = pa->pa_cookie;
    132 	spkr_attach(self, spkr_pcppi_tone, spkr_pcppi_rest);
    133 	if (!pmf_device_register(self, NULL, NULL))
    134 		aprint_error_dev(self, "couldn't establish power handler\n");
    135 }
    136 
    137 static int
    138 spkr_pcppi_detach(device_t self, int flags)
    139 {
    140 	struct spkr_pcppi_softc *sc = device_private(self);
    141 
    142 	sc->sc_pcppicookie = NULL;
    143 	pmf_device_deregister(self);
    144 	return 0;
    145 }
    146