/* $NetBSD: hpet_acpi.c,v 1.11 2011/06/15 09:02:38 jruoho Exp $ */ /* * Copyright (c) 2011 Jukka Ruohonen * Copyright (c) 2006 Nicolas Joly * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: hpet_acpi.c,v 1.11 2011/06/15 09:02:38 jruoho Exp $"); #include #include #include #include #include #include #include #define _COMPONENT ACPI_RESOURCE_COMPONENT ACPI_MODULE_NAME ("acpi_hpet") static int hpet_acpi_tab_match(device_t, cfdata_t, void *); static void hpet_acpi_tab_attach(device_t, device_t, void *); static bus_addr_t hpet_acpi_tab_addr(void); static int hpet_acpi_dev_match(device_t, cfdata_t, void *); static void hpet_acpi_dev_attach(device_t, device_t, void *); static bus_addr_t hpet_acpi_dev_addr(device_t, void *, bus_size_t *); static int hpet_acpi_detach(device_t, int); static const char * const hpet_acpi_ids[] = { "PNP0103", NULL }; CFATTACH_DECL_NEW(hpet_acpi_tab, sizeof(struct hpet_softc), hpet_acpi_tab_match, hpet_acpi_tab_attach, hpet_acpi_detach, NULL); CFATTACH_DECL_NEW(hpet_acpi_dev, sizeof(struct hpet_softc), hpet_acpi_dev_match, hpet_acpi_dev_attach, hpet_acpi_detach, NULL); static int hpet_acpi_tab_match(device_t parent, cfdata_t match, void *aux) { struct acpi_attach_args *aa = aux; bus_space_handle_t bh; bus_space_tag_t bt; bus_addr_t addr; addr = hpet_acpi_tab_addr(); if (addr == 0) return 0; bt = aa->aa_memt; if (bus_space_map(bt, addr, HPET_WINDOW_SIZE, 0, &bh) != 0) return 0; bus_space_unmap(bt, bh, HPET_WINDOW_SIZE); return 1; } static void hpet_acpi_tab_attach(device_t parent, device_t self, void *aux) { struct hpet_softc *sc = device_private(self); struct acpi_attach_args *aa = aux; bus_addr_t addr; sc->sc_mapped = false; addr = hpet_acpi_tab_addr(); if (addr == 0) { aprint_error(": failed to get address\n"); return; } sc->sc_memt = aa->aa_memt; sc->sc_mems = HPET_WINDOW_SIZE; if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) { aprint_error(": failed to map mem space\n"); return; } aprint_naive("\n"); aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n", (uint32_t)addr, (uint32_t)addr + HPET_WINDOW_SIZE); sc->sc_mapped = true; hpet_attach_subr(self); } static bus_addr_t hpet_acpi_tab_addr(void) { ACPI_TABLE_HPET *hpet; ACPI_STATUS rv; rv = AcpiGetTable(ACPI_SIG_HPET, 1, (ACPI_TABLE_HEADER **)&hpet); if (ACPI_FAILURE(rv)) return 0; if (hpet->Address.Address == 0) return 0; if (hpet->Address.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) return 0; if (hpet->Address.Address == 0xfed0000000000000UL) /* A quirk. */ hpet->Address.Address >>= 32; return hpet->Address.Address; } static int hpet_acpi_dev_match(device_t parent, cfdata_t match, void *aux) { struct acpi_attach_args *aa = aux; bus_space_handle_t bh; bus_space_tag_t bt; bus_size_t len = 0; bus_addr_t addr; if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) return 0; if (acpi_match_hid(aa->aa_node->ad_devinfo, hpet_acpi_ids) == 0) return 0; addr = hpet_acpi_dev_addr(parent, aa, &len); if (addr == 0 || len == 0) return 0; bt = aa->aa_memt; if (bus_space_map(bt, addr, len, 0, &bh) == 0) { bus_space_unmap(bt, bh, len); return 1; } return 0; } static void hpet_acpi_dev_attach(device_t parent, device_t self, void *aux) { struct hpet_softc *sc = device_private(self); struct acpi_attach_args *aa = aux; bus_addr_t addr; sc->sc_mapped = false; addr = hpet_acpi_dev_addr(self, aa, &sc->sc_mems); if (addr == 0) { aprint_error(": failed to get address\n"); return; } sc->sc_memt = aa->aa_memt; if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) { aprint_error(": failed to map mem space\n"); return; } aprint_naive("\n"); aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n", (uint32_t)addr, (uint32_t)(addr + sc->sc_mems)); sc->sc_mapped = true; hpet_attach_subr(self); } static bus_addr_t hpet_acpi_dev_addr(device_t self, void *aux, bus_size_t *len) { struct acpi_attach_args *aa = aux; struct acpi_resources res; struct acpi_mem *mem; bus_addr_t addr = 0; ACPI_STATUS rv; rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", &res, &acpi_resource_parse_ops_quiet); if (ACPI_FAILURE(rv)) return 0; mem = acpi_res_mem(&res, 0); if (mem == NULL) goto out; if (mem->ar_length < HPET_WINDOW_SIZE) goto out; addr = mem->ar_base; *len = mem->ar_length; out: acpi_resource_cleanup(&res); return addr; } static int hpet_acpi_detach(device_t self, int flags) { struct hpet_softc *sc = device_private(self); int rv; if (sc->sc_mapped != true) return 0; rv = hpet_detach(self, flags); if (rv != 0) return rv; bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_mems); return 0; }