1 /* $OpenBSD: iosf_acpi.c,v 1.1 2023/04/23 00:20:26 dlg Exp $ */
2 /*
3 * Copyright (c) 2023 David Gwynne <dlg@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/param.h>
19 #include <sys/systm.h>
20 #include <sys/device.h>
21
22 #include <machine/bus.h>
23 #include <machine/intr.h>
24
25 #include <dev/acpi/acpireg.h>
26 #include <dev/acpi/acpivar.h>
27 #include <dev/acpi/acpidev.h>
28 #include <dev/acpi/amltypes.h>
29 #include <dev/acpi/dsdt.h>
30
31 #include <dev/ic/iosfvar.h>
32
33 struct iosf_acpi_softc {
34 struct device sc_dev;
35 struct acpi_softc *sc_acpi;
36 struct aml_node *sc_node;
37
38 bus_space_tag_t sc_iot;
39 bus_space_handle_t sc_ioh;
40 bus_size_t sc_ios;
41
42 struct iosf_mbi sc_mbi;
43 };
44
45 static int iosf_acpi_match(struct device *, void *, void *);
46 static void iosf_acpi_attach(struct device *, struct device *, void *);
47
48 static uint32_t iosf_acpi_mbi_mdr_rd(struct iosf_mbi *, uint32_t, uint32_t);
49 static void iosf_acpi_mbi_mdr_wr(struct iosf_mbi *, uint32_t, uint32_t,
50 uint32_t);
51
52 const struct cfattach iosf_acpi_ca = {
53 sizeof(struct iosf_acpi_softc), iosf_acpi_match, iosf_acpi_attach
54 };
55
56 static const char *iosf_hids[] = {
57 "INT33BD",
58 NULL
59 };
60
61 static int
iosf_acpi_match(struct device * parent,void * match,void * aux)62 iosf_acpi_match(struct device *parent, void *match, void *aux)
63 {
64 struct acpi_attach_args *aaa = aux;
65 struct cfdata *cf = match;
66
67 if (aaa->aaa_naddr < 1)
68 return 0;
69
70 return (acpi_matchhids(aaa, iosf_hids, cf->cf_driver->cd_name));
71 }
72
73 static void
iosf_acpi_attach(struct device * parent,struct device * self,void * aux)74 iosf_acpi_attach(struct device *parent, struct device *self, void *aux)
75 {
76 struct iosf_acpi_softc *sc = (struct iosf_acpi_softc *)self;
77 struct acpi_attach_args *aaa = aux;
78 struct cpu_info *ci;
79 int semaddr = -1;
80
81 sc->sc_acpi = (struct acpi_softc *)parent;
82 sc->sc_node = aaa->aaa_node;
83 printf(" %s", sc->sc_node->name);
84
85 sc->sc_iot = aaa->aaa_bst[0];
86 sc->sc_ios = aaa->aaa_size[0];
87
88 if (bus_space_map(sc->sc_iot, aaa->aaa_addr[0], aaa->aaa_size[0], 0,
89 &sc->sc_ioh)) {
90 printf(": can't map registers\n");
91 return;
92 }
93
94 ci = curcpu();
95 if (strcmp(cpu_vendor, "GenuineIntel") == 0 &&
96 ci->ci_family == 0x06 && ci->ci_model == 0x4c) {
97 /* cherry trail, braswell */
98 semaddr = 0x10e;
99 }
100
101 if (semaddr != -1) {
102 printf(": mbi");
103
104 sc->sc_mbi.mbi_dev = self;
105 sc->sc_mbi.mbi_prio = 1; /* lower prio than iosf_pci ops */
106 sc->sc_mbi.mbi_semaddr = semaddr;
107 sc->sc_mbi.mbi_mdr_rd = iosf_acpi_mbi_mdr_rd;
108 sc->sc_mbi.mbi_mdr_wr = iosf_acpi_mbi_mdr_wr;
109 }
110
111 printf("\n");
112 }
113
114 /*
115 * mbi mdr ACPI operations
116 */
117
118 #define IOSF_ACPI_MBI_MCR 0x0
119 #define IOSF_ACPI_MBI_MDR 0x4
120 #define IOSF_ACPI_MBI_MCRX 0x8
121
122 static uint32_t
iosf_acpi_mbi_mdr_rd(struct iosf_mbi * mbi,uint32_t mcr,uint32_t mcrx)123 iosf_acpi_mbi_mdr_rd(struct iosf_mbi *mbi, uint32_t mcr, uint32_t mcrx)
124 {
125 struct iosf_acpi_softc *sc = (struct iosf_acpi_softc *)mbi->mbi_dev;
126
127 if (mcrx != 0) {
128 bus_space_write_4(sc->sc_iot, sc->sc_ioh,
129 IOSF_ACPI_MBI_MCRX, mcrx);
130 }
131 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOSF_ACPI_MBI_MCR, mcr);
132
133 return (bus_space_read_4(sc->sc_iot, sc->sc_ioh, IOSF_ACPI_MBI_MDR));
134 }
135
136 static void
iosf_acpi_mbi_mdr_wr(struct iosf_mbi * mbi,uint32_t mcr,uint32_t mcrx,uint32_t mdr)137 iosf_acpi_mbi_mdr_wr(struct iosf_mbi *mbi, uint32_t mcr, uint32_t mcrx,
138 uint32_t mdr)
139 {
140 struct iosf_acpi_softc *sc = (struct iosf_acpi_softc *)mbi->mbi_dev;
141
142 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOSF_ACPI_MBI_MDR, mdr);
143 if (mcrx != 0) {
144 bus_space_write_4(sc->sc_iot, sc->sc_ioh,
145 IOSF_ACPI_MBI_MCRX, mcrx);
146 }
147
148 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOSF_ACPI_MBI_MCR, mcr);
149 }
150