daca.c revision 1.12 
1/*	$OpenBSD: daca.c,v 1.12 2022/03/13 12:33:01 mpi Exp $	*/
2
3/*-
4 * Copyright (c) 2002,2003 Tsubai Masanari.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/*
30 * Datasheet is available from
31 * http://www.indata.si/grega/pdfs/dac3550a.pdf
32 */
33
34#include <sys/param.h>
35#include <sys/audioio.h>
36#include <sys/device.h>
37#include <sys/systm.h>
38
39#include <dev/audio_if.h>
40#include <dev/ofw/openfirm.h>
41#include <macppc/dev/dbdma.h>
42
43#include <machine/autoconf.h>
44
45#include <macppc/dev/i2svar.h>
46
47#ifdef DACA_DEBUG
48# define DPRINTF printf
49#else
50# define DPRINTF while (0) printf
51#endif
52
53/* XXX */
54#define daca_softc i2s_softc
55
56/* XXX */
57int kiic_write(struct device *, int, int, const void *, int);
58int kiic_writereg(struct device *, int, u_int);
59
60int daca_match(struct device *, void *, void *);
61void daca_attach(struct device *, struct device *, void *);
62void daca_defer(struct device *);
63void daca_init(struct daca_softc *);
64void daca_set_volume(struct daca_softc *, int, int);
65
66const struct cfattach daca_ca = {
67	sizeof(struct daca_softc), daca_match, daca_attach
68};
69
70struct cfdriver daca_cd = {
71	NULL, "daca", DV_DULL
72};
73
74struct audio_hw_if daca_hw_if = {
75	i2s_open,
76	i2s_close,
77	i2s_set_params,
78	i2s_round_blocksize,
79	NULL,
80	NULL,
81	NULL,
82	NULL,
83	NULL,
84	i2s_halt_output,
85	i2s_halt_input,
86	NULL,
87	NULL,
88	i2s_set_port,
89	i2s_get_port,
90	i2s_query_devinfo,
91	i2s_allocm,		/* allocm */
92	NULL,
93	i2s_round_buffersize,
94	i2s_get_props,
95	i2s_trigger_output,
96	i2s_trigger_input
97};
98
99/* DAC3550A registers */
100#define DEQ_SR		0x01	/* Sample rate control (8) */
101#define DEQ_AVOL	0x02	/* Analog volume (16) */
102#define DEQ_GCFG	0x03	/* Global configuration (8) */
103
104int
105daca_match(struct device *parent, void *match, void *aux)
106{
107	struct confargs *ca = aux;
108	int soundbus, soundchip;
109	char compat[32];
110
111	if (strcmp(ca->ca_name, "i2s") != 0)
112		return (0);
113
114	if ((soundbus = OF_child(ca->ca_node)) == 0 ||
115	    (soundchip = OF_child(soundbus)) == 0)
116		return (0);
117
118	bzero(compat, sizeof compat);
119	OF_getprop(soundchip, "compatible", compat, sizeof compat);
120
121	if (strcmp(compat, "daca") != 0)
122		return (0);
123
124	return (1);
125}
126
127#define DEQaddr 0x9a
128
129void
130daca_attach(struct device *parent,struct device *self, void *aux)
131{
132	struct daca_softc *sc = (struct daca_softc *)self;
133
134	sc->sc_setvolume = daca_set_volume;
135
136	i2s_attach(parent, sc, aux);
137	config_defer(self, daca_defer);
138}
139
140void
141daca_defer(struct device *dev)
142{
143	struct daca_softc *sc = (struct daca_softc *)dev;
144	struct device *dv;
145
146	TAILQ_FOREACH(dv, &alldevs, dv_list)
147		if (strcmp(dv->dv_cfdata->cf_driver->cd_name, "kiic") == 0 &&
148		    strcmp(dv->dv_parent->dv_cfdata->cf_driver->cd_name, "macobio") == 0)
149			sc->sc_i2c = dv;
150	if (sc->sc_i2c == NULL) {
151		printf("%s: unable to find i2c\n", sc->sc_dev.dv_xname);
152		return;
153	}
154
155	/* XXX If i2c has failed to attach, what should we do? */
156
157	audio_attach_mi(&daca_hw_if, sc, NULL, &sc->sc_dev);
158
159	daca_init(sc);
160}
161
162void
163daca_init(struct daca_softc *sc)
164{
165	i2s_set_rate(sc, 44100);
166	kiic_writereg(sc->sc_i2c, 4, 0x01 | 0x02 | 0x04);
167}
168
169void
170daca_set_volume(struct daca_softc *sc, int left, int right)
171{
172	u_int16_t data;
173
174	sc->sc_vol_l = left;
175	sc->sc_vol_r = right;
176
177	left >>= 2;
178	right >>= 2;
179	data = left << 8 | right;
180	kiic_write(sc->sc_i2c, DEQaddr, DEQ_AVOL, &data, 2);
181}
182