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 33struct 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 45static int iosf_acpi_match(struct device *, void *, void *); 46static void iosf_acpi_attach(struct device *, struct device *, void *); 47 48static uint32_t iosf_acpi_mbi_mdr_rd(struct iosf_mbi *, uint32_t, uint32_t); 49static void iosf_acpi_mbi_mdr_wr(struct iosf_mbi *, uint32_t, uint32_t, 50 uint32_t); 51 52const struct cfattach iosf_acpi_ca = { 53 sizeof(struct iosf_acpi_softc), iosf_acpi_match, iosf_acpi_attach 54}; 55 56static const char *iosf_hids[] = { 57 "INT33BD", 58 NULL 59}; 60 61static int 62iosf_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 73static void 74iosf_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 122static uint32_t 123iosf_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 136static void 137iosf_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