spkr_pcppi.c revision 1.5 
1/*	$NetBSD: spkr_pcppi.c,v 1.5 2016/12/13 20:20:34 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 1.5 2016/12/13 20:20:34 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/spkrvar.h>
65#include <dev/spkrio.h>
66
67struct spkr_pcppi_softc {
68	device_t sc_dev;
69	device_t sc_spkr_dev;
70	pcppi_tag_t sc_pcppicookie;
71};
72
73static int spkr_pcppi_probe(device_t, cfdata_t, void *);
74static void spkr_pcppi_attach(device_t, device_t, void *);
75static int spkr_pcppi_detach(device_t, int);
76
77CFATTACH_DECL_NEW(spkr_pcppi, sizeof(struct spkr_pcppi_softc),
78    spkr_pcppi_probe, spkr_pcppi_attach, spkr_pcppi_detach, NULL);
79
80MODULE(MODULE_CLASS_DRIVER, spkr, NULL /* "pcppi" */);
81
82static int
83spkr_modcmd(modcmd_t cmd, void *arg)
84{
85	return spkr__modcmd(cmd, arg);
86}
87
88#define SPKRPRI (PZERO - 1)
89
90/* emit tone of frequency hz for given number of ticks */
91static void
92spkr_pcppi_tone(device_t self, u_int xhz, u_int ticks)
93{
94#ifdef SPKRDEBUG
95	aprint_debug_dev(self, "%s: %u %u\n", __func__, xhz, ticks);
96#endif /* SPKRDEBUG */
97	struct spkr_pcppi_softc *sc = device_private(self);
98	pcppi_bell(sc->sc_pcppicookie, xhz, ticks, PCPPI_BELL_SLEEP);
99}
100
101/* rest for given number of ticks */
102static void
103spkr_pcppi_rest(device_t self, int ticks)
104{
105	/*
106	 * Set timeout to endrest function, then give up the timeslice.
107	 * This is so other processes can execute while the rest is being
108	 * waited out.
109	 */
110#ifdef SPKRDEBUG
111	aprint_debug_dev(self, "%s: %d\n", __func__, ticks);
112#endif /* SPKRDEBUG */
113	if (ticks > 0)
114		tsleep(self, SPKRPRI | PCATCH, device_xname(self), ticks);
115}
116
117static int
118spkr_pcppi_probe(device_t parent, cfdata_t cf, void *aux)
119{
120	return 1;
121}
122
123static void
124spkr_pcppi_attach(device_t parent, device_t self, void *aux)
125{
126	struct pcppi_attach_args *pa = aux;
127	struct spkr_pcppi_softc *sc = device_private(self);
128
129	aprint_naive("\n");
130	aprint_normal("\n");
131
132	sc->sc_pcppicookie = pa->pa_cookie;
133	spkr_attach(self, spkr_pcppi_tone, spkr_pcppi_rest);
134	if (!pmf_device_register(self, NULL, NULL))
135		aprint_error_dev(self, "couldn't establish power handler\n");
136}
137
138static int
139spkr_pcppi_detach(device_t self, int flags)
140{
141	struct spkr_pcppi_softc *sc = device_private(self);
142
143	sc->sc_pcppicookie = NULL;
144	pmf_device_deregister(self);
145	return 0;
146}
147