1 /* $NetBSD: mpu_acpi.c,v 1.16 2021/01/29 15:49:55 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2002 Jared D. McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 /*
29 * ACPI mpu(4) attachment based in lpt_acpi.c by Jared D. McNeill.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: mpu_acpi.c,v 1.16 2021/01/29 15:49:55 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/device.h>
37 #include <sys/systm.h>
38
39 #include <dev/acpi/acpivar.h>
40 #include <dev/acpi/acpi_intr.h>
41
42 #include <dev/ic/mpuvar.h>
43
44 #include <dev/isa/isadmavar.h>
45
46 static int mpu_acpi_match(device_t, cfdata_t, void *);
47 static void mpu_acpi_attach(device_t, device_t, void *);
48
49 struct mpu_acpi_softc {
50 struct mpu_softc sc_mpu;
51 kmutex_t sc_lock;
52 };
53
54 CFATTACH_DECL_NEW(mpu_acpi, sizeof(struct mpu_acpi_softc), mpu_acpi_match,
55 mpu_acpi_attach, NULL, NULL);
56
57 /*
58 * Supported device IDs
59 */
60
61 static const struct device_compatible_entry compat_data[] = {
62 { .compat = "PNPB006" }, /* Roland MPU-401 (compatible) MIDI UART */
63 DEVICE_COMPAT_EOL
64 };
65
66 /*
67 * mpu_acpi_match: autoconf(9) match routine
68 */
69 static int
mpu_acpi_match(device_t parent,cfdata_t match,void * aux)70 mpu_acpi_match(device_t parent, cfdata_t match, void *aux)
71 {
72 struct acpi_attach_args *aa = aux;
73
74 return acpi_compatible_match(aa, compat_data);
75 }
76
77 /*
78 * mpu_acpi_attach: autoconf(9) attach routine
79 */
80 static void
mpu_acpi_attach(device_t parent,device_t self,void * aux)81 mpu_acpi_attach(device_t parent, device_t self, void *aux)
82 {
83 struct mpu_acpi_softc *asc = device_private(self);
84 struct mpu_softc *sc = &asc->sc_mpu;
85 struct acpi_attach_args *aa = aux;
86 struct acpi_resources res;
87 struct acpi_io *io;
88 ACPI_STATUS rv;
89
90 /* parse resources */
91 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
92 &res, &acpi_resource_parse_ops_default);
93 if (ACPI_FAILURE(rv))
94 return;
95
96 /* find our i/o registers */
97 io = acpi_res_io(&res, 0);
98 if (io == NULL) {
99 aprint_error_dev(self,
100 "unable to find i/o register resource\n");
101 goto out;
102 }
103
104 sc->iot = aa->aa_iot;
105 if (bus_space_map(sc->iot, io->ar_base, io->ar_length, 0, &sc->ioh)) {
106 aprint_error_dev(self, "can't map i/o space\n");
107 goto out;
108 }
109
110 sc->model = "Roland MPU-401 MIDI UART";
111 sc->sc_dev = self;
112 sc->lock = &asc->sc_lock;
113 mutex_init(&asc->sc_lock, MUTEX_DEFAULT, IPL_AUDIO);
114 mpu_attach(sc);
115
116 sc->arg = acpi_intr_establish(self,
117 (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
118 IPL_AUDIO, true, mpu_intr, sc, device_xname(self));
119 if (sc->arg == NULL) {
120 aprint_error_dev(self, "unable to establish interrupt\n");
121 goto out;
122 }
123
124 out:
125 acpi_resource_cleanup(&res);
126 }
127