1 /* $OpenBSD: pluart_acpi.c,v 1.9 2022/06/11 05:29:24 anton Exp $ */
2 /*
3 * Copyright (c) 2018 Mark Kettenis
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/malloc.h>
20 #include <sys/systm.h>
21 #include <sys/tty.h>
22
23 #include <dev/acpi/acpireg.h>
24 #include <dev/acpi/acpivar.h>
25 #include <dev/acpi/acpidev.h>
26 #include <dev/acpi/amltypes.h>
27 #include <dev/acpi/dsdt.h>
28
29 #undef DEVNAME
30 #include <dev/ic/pluartvar.h>
31 #include <dev/cons.h>
32
33 struct pluart_acpi_softc {
34 struct pluart_softc sc;
35 struct acpi_softc *sc_acpi;
36 struct aml_node *sc_node;
37 bus_addr_t sc_addr;
38 void *sc_ih;
39 };
40
41 int pluart_acpi_match(struct device *, void *, void *);
42 void pluart_acpi_attach(struct device *, struct device *, void *);
43
44 const struct cfattach pluart_acpi_ca = {
45 sizeof(struct pluart_acpi_softc), pluart_acpi_match, pluart_acpi_attach
46 };
47
48 const char *pluart_hids[] = {
49 "ARMH0011",
50 NULL
51 };
52
53 int pluart_acpi_is_console(struct pluart_acpi_softc *);
54
55 int
pluart_acpi_match(struct device * parent,void * match,void * aux)56 pluart_acpi_match(struct device *parent, void *match, void *aux)
57 {
58 struct acpi_attach_args *aaa = aux;
59 struct cfdata *cf = match;
60
61 if (aaa->aaa_naddr < 1 || aaa->aaa_nirq < 1)
62 return 0;
63 return acpi_matchhids(aaa, pluart_hids, cf->cf_driver->cd_name);
64 }
65
66 void
pluart_acpi_attach(struct device * parent,struct device * self,void * aux)67 pluart_acpi_attach(struct device *parent, struct device *self, void *aux)
68 {
69 struct pluart_acpi_softc *sc = (struct pluart_acpi_softc *)self;
70 struct acpi_attach_args *aaa = aux;
71
72 sc->sc_acpi = (struct acpi_softc *)parent;
73 sc->sc_node = aaa->aaa_node;
74 printf(" %s", sc->sc_node->name);
75
76 printf(" addr 0x%llx/0x%llx", aaa->aaa_addr[0], aaa->aaa_size[0]);
77 printf(" irq %d", aaa->aaa_irq[0]);
78
79 sc->sc.sc_iot = aaa->aaa_bst[0];
80 sc->sc_addr = aaa->aaa_addr[0];
81 if (bus_space_map(sc->sc.sc_iot, aaa->aaa_addr[0], aaa->aaa_size[0],
82 0, &sc->sc.sc_ioh)) {
83 printf(": can't map registers\n");
84 return;
85 }
86
87 sc->sc_ih = acpi_intr_establish(aaa->aaa_irq[0], aaa->aaa_irq_flags[0],
88 IPL_TTY, pluart_intr, sc, sc->sc.sc_dev.dv_xname);
89 if (sc->sc_ih == NULL) {
90 printf(": can't establish interrupt\n");
91 return;
92 }
93
94 sc->sc.sc_hwflags |= COM_HW_SBSA;
95
96 pluart_attach_common(&sc->sc, pluart_acpi_is_console(sc));
97 }
98
99 int
pluart_acpi_is_console(struct pluart_acpi_softc * sc)100 pluart_acpi_is_console(struct pluart_acpi_softc *sc)
101 {
102 struct acpi_table_header *hdr;
103 struct acpi_spcr *spcr;
104 struct acpi_gas *base;
105 struct acpi_q *entry;
106
107 SIMPLEQ_FOREACH(entry, &sc->sc_acpi->sc_tables, q_next) {
108 hdr = entry->q_table;
109 if (strncmp(hdr->signature, SPCR_SIG,
110 sizeof(hdr->signature)) == 0) {
111 spcr = entry->q_table;
112 base = &spcr->base_address;
113 if (base->address_space_id == GAS_SYSTEM_MEMORY &&
114 base->address == sc->sc_addr)
115 return 1;
116 }
117 }
118
119 return 0;
120 }
121