1 /* $OpenBSD: pluart_acpi.c,v 1.4 2020/05/08 11:18:01 kettenis 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 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 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 return acpi_matchhids(aaa, pluart_hids, cf->cf_driver->cd_name); 62 } 63 64 void 65 pluart_acpi_attach(struct device *parent, struct device *self, void *aux) 66 { 67 struct pluart_acpi_softc *sc = (struct pluart_acpi_softc *)self; 68 struct acpi_attach_args *aaa = aux; 69 70 sc->sc_acpi = (struct acpi_softc *)parent; 71 sc->sc_node = aaa->aaa_node; 72 printf(" %s", sc->sc_node->name); 73 74 if (aaa->aaa_naddr < 1) { 75 printf(": no registers\n"); 76 return; 77 } 78 79 if (aaa->aaa_nirq < 1) { 80 printf(": no interrupt\n"); 81 return; 82 } 83 84 printf(" addr 0x%llx/0x%llx", aaa->aaa_addr[0], aaa->aaa_size[0]); 85 printf(" irq %d", aaa->aaa_irq[0]); 86 87 sc->sc.sc_iot = aaa->aaa_bst[0]; 88 sc->sc_addr = aaa->aaa_addr[0]; 89 if (bus_space_map(sc->sc.sc_iot, aaa->aaa_addr[0], aaa->aaa_size[0], 90 0, &sc->sc.sc_ioh)) { 91 printf(": can't map registers\n"); 92 return; 93 } 94 95 sc->sc_ih = acpi_intr_establish(aaa->aaa_irq[0], aaa->aaa_irq_flags[0], 96 IPL_TTY, pluart_intr, sc, sc->sc.sc_dev.dv_xname); 97 if (sc->sc_ih == NULL) { 98 printf(": can't establish interrupt\n"); 99 return; 100 } 101 102 pluart_attach_common(&sc->sc, pluart_acpi_is_console(sc)); 103 } 104 105 int 106 pluart_acpi_is_console(struct pluart_acpi_softc *sc) 107 { 108 struct acpi_table_header *hdr; 109 struct acpi_spcr *spcr; 110 struct acpi_gas *base; 111 struct acpi_q *entry; 112 113 SIMPLEQ_FOREACH(entry, &sc->sc_acpi->sc_tables, q_next) { 114 hdr = entry->q_table; 115 if (strncmp(hdr->signature, SPCR_SIG, 116 sizeof(hdr->signature)) == 0) { 117 spcr = entry->q_table; 118 base = &spcr->base_address; 119 if (base->address_space_id == GAS_SYSTEM_MEMORY && 120 base->address == sc->sc_addr) 121 return 1; 122 } 123 } 124 125 return 0; 126 } 127