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 33struct 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 41int pluart_acpi_match(struct device *, void *, void *); 42void pluart_acpi_attach(struct device *, struct device *, void *); 43 44const struct cfattach pluart_acpi_ca = { 45 sizeof(struct pluart_acpi_softc), pluart_acpi_match, pluart_acpi_attach 46}; 47 48const char *pluart_hids[] = { 49 "ARMH0011", 50 NULL 51}; 52 53int pluart_acpi_is_console(struct pluart_acpi_softc *); 54 55int 56pluart_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 66void 67pluart_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 99int 100pluart_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