spkr_pcppi.c revision 1.3 
1/*	$NetBSD: spkr_pcppi.c,v 1.3 2016/12/09 04:46:39 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 1.3 2016/12/09 04:46:39 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/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
81#ifdef _MODULE
82#include "ioconf.c"
83#endif
84
85CFATTACH_DECL_NEW(spkr_pcppi, 0, spkr_probe, spkrattach, spkrdetach, NULL);
86
87static pcppi_tag_t ppicookie;
88
89#define SPKRPRI (PZERO - 1)
90
91void
92spkr_tone(u_int xhz, u_int ticks)
93/* emit tone of frequency hz for given number of ticks */
94{
95	pcppi_bell(ppicookie, xhz, ticks, PCPPI_BELL_SLEEP);
96}
97
98void
99spkr_rest(int ticks)
100/* rest for given number of ticks */
101{
102    /*
103     * Set timeout to endrest function, then give up the timeslice.
104     * This is so other processes can execute while the rest is being
105     * waited out.
106     */
107#ifdef SPKRDEBUG
108    printf("%s: %d\n", __func__, ticks);
109#endif /* SPKRDEBUG */
110    if (ticks > 0)
111	    tsleep(spkr_rest, SPKRPRI | PCATCH, "rest", ticks);
112}
113
114static void
115spkrattach(device_t parent, device_t self, void *aux)
116{
117	aprint_naive("\n");
118	aprint_normal("\n");
119	ppicookie = ((struct pcppi_attach_args *)aux)->pa_cookie;
120	spkr_attached = 1;
121	if (!pmf_device_register(self, NULL, NULL))
122		aprint_error_dev(self, "couldn't establish power handler\n");
123}
124
125static int
126spkrdetach(device_t self, int flags)
127{
128
129	pmf_device_deregister(self);
130	spkr_attached = 0;
131	ppicookie = NULL;
132
133	return 0;
134}
135