1 /* $NetBSD: vchiq_netbsd_acpi.c,v 1.5 2021/08/07 16:19:18 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jared D. McNeill
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: vchiq_netbsd_acpi.c,v 1.5 2021/08/07 16:19:18 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/device.h>
38 #include <sys/kernel.h>
39 #include <sys/bus.h>
40 #include <sys/sysctl.h>
41
42 #include <arm/broadcom/bcm2835reg.h>
43 #include <arm/broadcom/bcm2835_intr.h>
44
45 #include <dev/acpi/acpivar.h>
46 #include <dev/acpi/acpi_intr.h>
47
48 #include "vchiq_arm.h"
49 #include "vchiq_2835.h"
50 #include "vchiq_netbsd.h"
51
52 struct vchiq_acpi_softc {
53 struct vchiq_softc sc_vchiq;
54 ACPI_HANDLE sc_handle;
55 };
56
57 static int vchiq_acpi_match(device_t, cfdata_t, void *);
58 static void vchiq_acpi_attach(device_t, device_t, void *);
59
60 static void vchiq_acpi_defer(device_t);
61
62 /* External functions */
63 int vchiq_init(void);
64
65
66 CFATTACH_DECL_NEW(vchiq_acpi, sizeof(struct vchiq_acpi_softc),
67 vchiq_acpi_match, vchiq_acpi_attach, NULL, NULL);
68
69 static int
vchiq_acpi_match(device_t parent,cfdata_t match,void * aux)70 vchiq_acpi_match(device_t parent, cfdata_t match, void *aux)
71 {
72 const char * const compatible[] = { "BCM2835", NULL };
73 struct acpi_attach_args * const aa = aux;
74
75 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
76 return 0;
77
78 return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
79 }
80
81 static void
vchiq_acpi_attach(device_t parent,device_t self,void * aux)82 vchiq_acpi_attach(device_t parent, device_t self, void *aux)
83 {
84 struct vchiq_acpi_softc *asc = device_private(self);
85 struct vchiq_softc *sc = &asc->sc_vchiq;
86 struct acpi_attach_args * const aa = aux;
87 struct acpi_resources res;
88 struct acpi_mem *mem;
89 struct acpi_irq *irq;
90 ACPI_STATUS rv;
91
92 sc->sc_dev = self;
93 sc->sc_iot = aa->aa_memt;
94 asc->sc_handle = aa->aa_node->ad_handle;
95
96 #if BYTE_ORDER == BIG_ENDIAN
97 aprint_error_dev(sc->sc_dev, "not supported yet in big-endian mode\n");
98 return;
99 #endif
100
101 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
102 &res, &acpi_resource_parse_ops_default);
103 if (ACPI_FAILURE(rv))
104 return;
105
106 mem = acpi_res_mem(&res, 0);
107 irq = acpi_res_irq(&res, 0);
108 if (mem == NULL || irq == NULL) {
109 aprint_error_dev(self, "couldn't find resources\n");
110 return;
111 }
112
113 if (bus_space_map(sc->sc_iot, mem->ar_base, mem->ar_length, 0,
114 &sc->sc_ioh) != 0) {
115 aprint_error_dev(sc->sc_dev, "unable to map device\n");
116 return;
117 }
118
119 vchiq_platform_attach(aa->aa_dmat);
120
121 vchiq_set_softc(sc);
122
123 config_mountroot(self, vchiq_acpi_defer);
124 }
125
126 static void
vchiq_acpi_defer(device_t self)127 vchiq_acpi_defer(device_t self)
128 {
129 struct vchiq_attach_args vaa;
130 struct vchiq_acpi_softc *asc = device_private(self);
131 struct vchiq_softc *sc = &asc->sc_vchiq;
132 ACPI_HANDLE handle = asc->sc_handle;
133
134 vchiq_core_initialize();
135
136 sc->sc_ih = acpi_intr_establish(sc->sc_dev, (uint64_t)handle,
137 IPL_VM, true, vchiq_intr, sc, device_xname(self));
138 if (sc->sc_ih == NULL) {
139 aprint_error_dev(sc->sc_dev, "failed to establish interrupt\n");
140 return;
141 }
142
143 vchiq_init();
144
145 vaa.vaa_name = "AUDS";
146 config_found(self, &vaa, vchiq_print, CFARGS_NONE);
147 }
148