1 /* $NetBSD: hpet_acpi.c,v 1.12 2021/01/29 15:49:55 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2011 Jukka Ruohonen 5 * Copyright (c) 2006 Nicolas Joly 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: hpet_acpi.c,v 1.12 2021/01/29 15:49:55 thorpej Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/device.h> 36 #include <sys/time.h> 37 #include <sys/timetc.h> 38 39 #include <dev/acpi/acpivar.h> 40 41 #include <dev/ic/hpetreg.h> 42 #include <dev/ic/hpetvar.h> 43 44 #define _COMPONENT ACPI_RESOURCE_COMPONENT 45 ACPI_MODULE_NAME ("acpi_hpet") 46 47 static int hpet_acpi_tab_match(device_t, cfdata_t, void *); 48 static void hpet_acpi_tab_attach(device_t, device_t, void *); 49 static bus_addr_t hpet_acpi_tab_addr(void); 50 static int hpet_acpi_dev_match(device_t, cfdata_t, void *); 51 static void hpet_acpi_dev_attach(device_t, device_t, void *); 52 static bus_addr_t hpet_acpi_dev_addr(device_t, void *, bus_size_t *); 53 static int hpet_acpi_detach(device_t, int); 54 55 static const struct device_compatible_entry compat_data[] = { 56 { .compat = "PNP0103" }, 57 DEVICE_COMPAT_EOL 58 }; 59 60 CFATTACH_DECL_NEW(hpet_acpi_tab, sizeof(struct hpet_softc), 61 hpet_acpi_tab_match, hpet_acpi_tab_attach, hpet_acpi_detach, NULL); 62 63 CFATTACH_DECL_NEW(hpet_acpi_dev, sizeof(struct hpet_softc), 64 hpet_acpi_dev_match, hpet_acpi_dev_attach, hpet_acpi_detach, NULL); 65 66 static int 67 hpet_acpi_tab_match(device_t parent, cfdata_t match, void *aux) 68 { 69 struct acpi_attach_args *aa = aux; 70 bus_space_handle_t bh; 71 bus_space_tag_t bt; 72 bus_addr_t addr; 73 74 addr = hpet_acpi_tab_addr(); 75 76 if (addr == 0) 77 return 0; 78 79 bt = aa->aa_memt; 80 81 if (bus_space_map(bt, addr, HPET_WINDOW_SIZE, 0, &bh) != 0) 82 return 0; 83 84 bus_space_unmap(bt, bh, HPET_WINDOW_SIZE); 85 86 return 1; 87 } 88 89 static void 90 hpet_acpi_tab_attach(device_t parent, device_t self, void *aux) 91 { 92 struct hpet_softc *sc = device_private(self); 93 struct acpi_attach_args *aa = aux; 94 bus_addr_t addr; 95 96 sc->sc_mapped = false; 97 addr = hpet_acpi_tab_addr(); 98 99 if (addr == 0) { 100 aprint_error(": failed to get address\n"); 101 return; 102 } 103 104 sc->sc_memt = aa->aa_memt; 105 sc->sc_mems = HPET_WINDOW_SIZE; 106 107 if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) { 108 aprint_error(": failed to map mem space\n"); 109 return; 110 } 111 112 aprint_naive("\n"); 113 aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n", 114 (uint32_t)addr, (uint32_t)addr + HPET_WINDOW_SIZE); 115 116 sc->sc_mapped = true; 117 hpet_attach_subr(self); 118 } 119 120 static bus_addr_t 121 hpet_acpi_tab_addr(void) 122 { 123 ACPI_TABLE_HPET *hpet; 124 ACPI_STATUS rv; 125 126 rv = AcpiGetTable(ACPI_SIG_HPET, 1, (ACPI_TABLE_HEADER **)&hpet); 127 128 if (ACPI_FAILURE(rv)) 129 return 0; 130 131 if (hpet->Address.Address == 0) 132 return 0; 133 134 if (hpet->Address.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) 135 return 0; 136 137 if (hpet->Address.Address == 0xfed0000000000000UL) /* A quirk. */ 138 hpet->Address.Address >>= 32; 139 140 return hpet->Address.Address; 141 } 142 143 static int 144 hpet_acpi_dev_match(device_t parent, cfdata_t match, void *aux) 145 { 146 struct acpi_attach_args *aa = aux; 147 bus_space_handle_t bh; 148 bus_space_tag_t bt; 149 bus_size_t len = 0; 150 bus_addr_t addr; 151 int ret; 152 153 ret = acpi_compatible_match(aa, compat_data); 154 if (ret == 0) 155 return 0; 156 157 addr = hpet_acpi_dev_addr(parent, aa, &len); 158 159 if (addr == 0 || len == 0) 160 return 0; 161 162 bt = aa->aa_memt; 163 164 if (bus_space_map(bt, addr, len, 0, &bh) == 0) { 165 bus_space_unmap(bt, bh, len); 166 return ret; 167 } 168 169 return 0; 170 } 171 172 static void 173 hpet_acpi_dev_attach(device_t parent, device_t self, void *aux) 174 { 175 struct hpet_softc *sc = device_private(self); 176 struct acpi_attach_args *aa = aux; 177 bus_addr_t addr; 178 179 sc->sc_mapped = false; 180 addr = hpet_acpi_dev_addr(self, aa, &sc->sc_mems); 181 182 if (addr == 0) { 183 aprint_error(": failed to get address\n"); 184 return; 185 } 186 187 sc->sc_memt = aa->aa_memt; 188 189 if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) { 190 aprint_error(": failed to map mem space\n"); 191 return; 192 } 193 194 aprint_naive("\n"); 195 aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n", 196 (uint32_t)addr, (uint32_t)(addr + sc->sc_mems)); 197 198 sc->sc_mapped = true; 199 hpet_attach_subr(self); 200 } 201 202 static bus_addr_t 203 hpet_acpi_dev_addr(device_t self, void *aux, bus_size_t *len) 204 { 205 struct acpi_attach_args *aa = aux; 206 struct acpi_resources res; 207 struct acpi_mem *mem; 208 bus_addr_t addr = 0; 209 ACPI_STATUS rv; 210 211 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 212 &res, &acpi_resource_parse_ops_quiet); 213 214 if (ACPI_FAILURE(rv)) 215 return 0; 216 217 mem = acpi_res_mem(&res, 0); 218 219 if (mem == NULL) 220 goto out; 221 222 if (mem->ar_length < HPET_WINDOW_SIZE) 223 goto out; 224 225 addr = mem->ar_base; 226 *len = mem->ar_length; 227 228 out: 229 acpi_resource_cleanup(&res); 230 231 return addr; 232 } 233 234 static int 235 hpet_acpi_detach(device_t self, int flags) 236 { 237 struct hpet_softc *sc = device_private(self); 238 int rv; 239 240 if (sc->sc_mapped != true) 241 return 0; 242 243 rv = hpet_detach(self, flags); 244 245 if (rv != 0) 246 return rv; 247 248 bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_mems); 249 250 return 0; 251 } 252
Indexes created Sun Oct 25 00:26:45 UTC 2026