daca.c revision 1.14 
1/*	$OpenBSD: daca.c,v 1.14 2022/10/19 19:14:16 kn 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
74const struct audio_hw_if daca_hw_if = {
75	.open = i2s_open,
76	.close = i2s_close,
77	.set_params = i2s_set_params,
78	.round_blocksize = i2s_round_blocksize,
79	.halt_output = i2s_halt_output,
80	.halt_input = i2s_halt_input,
81	.set_port = i2s_set_port,
82	.get_port = i2s_get_port,
83	.query_devinfo = i2s_query_devinfo,
84	.allocm = i2s_allocm,
85	.round_buffersize = i2s_round_buffersize,
86	.get_props = i2s_get_props,
87	.trigger_output = i2s_trigger_output,
88	.trigger_input = i2s_trigger_input,
89};
90
91/* DAC3550A registers */
92#define DEQ_SR		0x01	/* Sample rate control (8) */
93#define DEQ_AVOL	0x02	/* Analog volume (16) */
94#define DEQ_GCFG	0x03	/* Global configuration (8) */
95
96int
97daca_match(struct device *parent, void *match, void *aux)
98{
99	struct confargs *ca = aux;
100	int soundbus, soundchip;
101	char compat[32];
102
103	if (strcmp(ca->ca_name, "i2s") != 0)
104		return (0);
105
106	if ((soundbus = OF_child(ca->ca_node)) == 0 ||
107	    (soundchip = OF_child(soundbus)) == 0)
108		return (0);
109
110	bzero(compat, sizeof compat);
111	OF_getprop(soundchip, "compatible", compat, sizeof compat);
112
113	if (strcmp(compat, "daca") != 0)
114		return (0);
115
116	return (1);
117}
118
119#define DEQaddr 0x9a
120
121void
122daca_attach(struct device *parent,struct device *self, void *aux)
123{
124	struct daca_softc *sc = (struct daca_softc *)self;
125
126	sc->sc_setvolume = daca_set_volume;
127
128	i2s_attach(parent, sc, aux);
129	config_defer(self, daca_defer);
130}
131
132void
133daca_defer(struct device *dev)
134{
135	struct daca_softc *sc = (struct daca_softc *)dev;
136	struct device *dv;
137
138	TAILQ_FOREACH(dv, &alldevs, dv_list)
139		if (strcmp(dv->dv_cfdata->cf_driver->cd_name, "kiic") == 0 &&
140		    strcmp(dv->dv_parent->dv_cfdata->cf_driver->cd_name, "macobio") == 0)
141			sc->sc_i2c = dv;
142	if (sc->sc_i2c == NULL) {
143		printf("%s: unable to find i2c\n", sc->sc_dev.dv_xname);
144		return;
145	}
146
147	/* XXX If i2c has failed to attach, what should we do? */
148
149	audio_attach_mi(&daca_hw_if, sc, NULL, &sc->sc_dev);
150
151	daca_init(sc);
152}
153
154void
155daca_init(struct daca_softc *sc)
156{
157	i2s_set_rate(sc, 44100);
158	kiic_writereg(sc->sc_i2c, 4, 0x01 | 0x02 | 0x04);
159}
160
161void
162daca_set_volume(struct daca_softc *sc, int left, int right)
163{
164	u_int16_t data;
165
166	sc->sc_vol_l = left;
167	sc->sc_vol_r = right;
168
169	left >>= 2;
170	right >>= 2;
171	data = left << 8 | right;
172	kiic_write(sc->sc_i2c, DEQaddr, DEQ_AVOL, &data, 2);
173}
174