spkr_pcppi.c revision 1.10 
1/*	$NetBSD: spkr_pcppi.c,v 1.10 2017/06/11 21:54:22 pgoyette 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 1.10 2017/06/11 21:54:22 pgoyette 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/uio.h>
55#include <sys/proc.h>
56#include <sys/ioctl.h>
57#include <sys/conf.h>
58
59#include <sys/bus.h>
60
61#include <dev/isa/pcppivar.h>
62
63#include <dev/spkrvar.h>
64#include <dev/spkrio.h>
65
66struct spkr_pcppi_softc {
67	struct spkr_softc sc_spkr;
68	pcppi_tag_t sc_pcppicookie;
69};
70
71static int spkr_pcppi_probe(device_t, cfdata_t, void *);
72static void spkr_pcppi_attach(device_t, device_t, void *);
73static int spkr_pcppi_detach(device_t, int);
74static int spkr_pcppi_rescan(device_t, const char *, const int *);
75static void spkr_pcppi_childdet(device_t, device_t);
76
77CFATTACH_DECL3_NEW(spkr_pcppi, sizeof(struct spkr_pcppi_softc),
78    spkr_pcppi_probe, spkr_pcppi_attach, spkr_pcppi_detach, NULL,
79    spkr_pcppi_rescan, spkr_pcppi_childdet, 0);
80
81#define SPKRPRI (PZERO - 1)
82
83/* emit tone of frequency hz for given number of ticks */
84static void
85spkr_pcppi_tone(device_t self, u_int xhz, u_int ticks)
86{
87#ifdef SPKRDEBUG
88	aprint_debug_dev(self, "%s: %u %u\n", __func__, xhz, ticks);
89#endif /* SPKRDEBUG */
90	struct spkr_pcppi_softc *sc = device_private(self);
91	pcppi_bell(sc->sc_pcppicookie, xhz, ticks, PCPPI_BELL_SLEEP);
92}
93
94/* rest for given number of ticks */
95static void
96spkr_pcppi_rest(device_t self, int ticks)
97{
98	/*
99	 * Set timeout to endrest function, then give up the timeslice.
100	 * This is so other processes can execute while the rest is being
101	 * waited out.
102	 */
103#ifdef SPKRDEBUG
104	aprint_debug_dev(self, "%s: %d\n", __func__, ticks);
105#endif /* SPKRDEBUG */
106	if (ticks > 0)
107		tsleep(self, SPKRPRI | PCATCH, device_xname(self), ticks);
108}
109
110static int
111spkr_pcppi_probe(device_t parent, cfdata_t cf, void *aux)
112{
113	return 1;
114}
115
116static void
117spkr_pcppi_attach(device_t parent, device_t self, void *aux)
118{
119	struct pcppi_attach_args *pa = aux;
120	struct spkr_pcppi_softc *sc = device_private(self);
121
122	aprint_naive("\n");
123	aprint_normal(": PC Speaker\n");
124
125	sc->sc_pcppicookie = pa->pa_cookie;
126	spkr_attach(self, spkr_pcppi_tone, spkr_pcppi_rest);
127	if (!pmf_device_register(self, NULL, NULL))
128		aprint_error_dev(self, "couldn't establish power handler\n");
129}
130
131static int
132spkr_pcppi_detach(device_t self, int flags)
133{
134	struct spkr_pcppi_softc *sc = device_private(self);
135	int error;
136
137	if ((error = spkr_detach(self, flags)) != 0)
138		return error;
139
140	sc->sc_pcppicookie = NULL;
141	pmf_device_deregister(self);
142	return 0;
143}
144
145static int
146spkr_pcppi_rescan(device_t self, const char *iattr, const int *locators)
147{
148
149	return spkr_rescan(self, iattr, locators);
150}
151
152static void
153spkr_pcppi_childdet(device_t self, device_t child)
154{
155
156	spkr_childdet(self, child);
157}
158