spkr_pcppi.c revision 1.1 
1/*	$NetBSD: spkr_pcppi.c,v 1.1 2016/12/09 02:22:34 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 1.1 2016/12/09 02:22:34 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/isa/spkrio.h>
65
66void spkrattach(device_t, device_t, void *);
67int spkrdetach(device_t, int);
68int spkrprobe(device_t, cfdata_t, void *);
69
70#include "ioconf.h"
71
72MODULE(MODULE_CLASS_DRIVER, spkr, NULL /* "pcppi" */);
73
74#ifdef _MODULE
75#include "ioconf.c"
76#endif
77
78CFATTACH_DECL_NEW(spkr_pcppi, 0, spkrprobe, spkrattach, spkrdetach, NULL);
79
80static pcppi_tag_t ppicookie;
81
82#define SPKRPRI (PZERO - 1)
83
84void
85spkr_tone(u_int xhz, u_int ticks)
86/* emit tone of frequency hz for given number of ticks */
87{
88	pcppi_bell(ppicookie, xhz, ticks, PCPPI_BELL_SLEEP);
89}
90
91void
92spkr_rest(int ticks)
93/* rest for given number of ticks */
94{
95    /*
96     * Set timeout to endrest function, then give up the timeslice.
97     * This is so other processes can execute while the rest is being
98     * waited out.
99     */
100#ifdef SPKRDEBUG
101    printf("%s: %d\n", __func__, ticks);
102#endif /* SPKRDEBUG */
103    if (ticks > 0)
104	    tsleep(spkr_rest, SPKRPRI | PCATCH, "rest", ticks);
105}
106
107extern int spkr_active;	/* exclusion flag */
108extern const struct cdevsw spkr_cdevsw;
109
110int spkr_attached = 0;
111
112int
113spkrprobe(device_t parent, cfdata_t match, void *aux)
114{
115	return (!spkr_attached);
116}
117
118void
119spkrattach(device_t parent, device_t self, void *aux)
120{
121	aprint_naive("\n");
122	aprint_normal("\n");
123	ppicookie = ((struct pcppi_attach_args *)aux)->pa_cookie;
124	spkr_attached = 1;
125	if (!pmf_device_register(self, NULL, NULL))
126		aprint_error_dev(self, "couldn't establish power handler\n");
127}
128
129int
130spkrdetach(device_t self, int flags)
131{
132
133	pmf_device_deregister(self);
134	spkr_attached = 0;
135	ppicookie = NULL;
136
137	return 0;
138}
139
140
141static int
142spkr_modcmd(modcmd_t cmd, void *arg)
143{
144#ifdef _MODULE
145	devmajor_t bmajor, cmajor;
146#endif
147	int error = 0;
148
149#ifdef _MODULE
150	switch(cmd) {
151	case MODULE_CMD_INIT:
152		bmajor = cmajor = -1;
153		error = devsw_attach(spkr_cd.cd_name, NULL, &bmajor,
154		    &spkr_cdevsw, &cmajor);
155		if (error)
156			break;
157
158		error = config_init_component(cfdriver_ioconf_spkr,
159			cfattach_ioconf_spkr, cfdata_ioconf_spkr);
160		if (error) {
161			devsw_detach(NULL, &spkr_cdevsw);
162		}
163		break;
164
165	case MODULE_CMD_FINI:
166		if (spkr_active)
167			return EBUSY;
168		error = config_fini_component(cfdriver_ioconf_spkr,
169			cfattach_ioconf_spkr, cfdata_ioconf_spkr);
170		devsw_detach(NULL, &spkr_cdevsw);
171		break;
172	default:
173		error = ENOTTY;
174		break;
175	}
176#endif
177
178	return error;
179}
180