1 /* $NetBSD: hpet_acpi.c,v 1.5 2010/03/05 14:00:17 jruoho Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Nicolas Joly 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: hpet_acpi.c,v 1.5 2010/03/05 14:00:17 jruoho Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/device.h> 36 #include <sys/systm.h> 37 #include <sys/time.h> 38 #include <sys/timetc.h> 39 40 #include <dev/acpi/acpivar.h> 41 42 #include <dev/ic/hpetvar.h> 43 44 static int hpet_acpi_match(device_t, cfdata_t, void *); 45 static void hpet_acpi_attach(device_t, device_t, void *); 46 47 48 CFATTACH_DECL_NEW(hpet_acpi, sizeof(struct hpet_softc), hpet_acpi_match, 49 hpet_acpi_attach, NULL, NULL); 50 51 /* 52 * Supported device IDs 53 */ 54 55 static const char * const hpet_acpi_ids[] = { 56 "PNP0103", 57 NULL 58 }; 59 60 /* 61 * hpet_acpi_match: autoconf(9) match routine 62 */ 63 static int 64 hpet_acpi_match(device_t parent, cfdata_t match, void *aux) 65 { 66 struct acpi_attach_args *aa = aux; 67 68 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 69 return 0; 70 71 return acpi_match_hid(aa->aa_node->ad_devinfo, hpet_acpi_ids); 72 } 73 74 static void 75 hpet_acpi_attach(device_t parent, device_t self, void *aux) 76 { 77 struct hpet_softc *sc = device_private(self); 78 struct acpi_attach_args *aa = aux; 79 struct acpi_resources res; 80 struct acpi_mem *mem; 81 ACPI_STATUS rv; 82 83 /* parse resources */ 84 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 85 &res, &acpi_resource_parse_ops_default); 86 if (ACPI_FAILURE(rv)) 87 return; 88 89 /* find our mem registers */ 90 mem = acpi_res_mem(&res, 0); 91 if (mem == NULL) { 92 aprint_error_dev(self, 93 "unable to find mem register resource\n"); 94 goto out; 95 } 96 97 sc->sc_memt = aa->aa_memt; 98 if (bus_space_map(sc->sc_memt, mem->ar_base, mem->ar_length, 99 0, &sc->sc_memh)) { 100 aprint_error_dev(self, "can't map mem space\n"); 101 goto out; 102 } 103 104 hpet_attach_subr(self); 105 106 out: 107 acpi_resource_cleanup(&res); 108 } 109