acpi_util.c revision 1.5.2.2
1 1.5.2.2 yamt /* $NetBSD: acpi_util.c,v 1.5.2.2 2010/08/11 22:53:16 yamt Exp $ */ 2 1.5.2.2 yamt 3 1.5.2.2 yamt /*- 4 1.5.2.2 yamt * Copyright (c) 2003, 2007 The NetBSD Foundation, Inc. 5 1.5.2.2 yamt * All rights reserved. 6 1.5.2.2 yamt * 7 1.5.2.2 yamt * This code is derived from software contributed to The NetBSD Foundation 8 1.5.2.2 yamt * by Charles M. Hannum of By Noon Software, Inc. 9 1.5.2.2 yamt * 10 1.5.2.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.5.2.2 yamt * modification, are permitted provided that the following conditions 12 1.5.2.2 yamt * are met: 13 1.5.2.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.5.2.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.5.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.5.2.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.5.2.2 yamt * documentation and/or other materials provided with the distribution. 18 1.5.2.2 yamt * 19 1.5.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.5.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.5.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.5.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.5.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.5.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.5.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.5.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.5.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.5.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.5.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.5.2.2 yamt */ 31 1.5.2.2 yamt 32 1.5.2.2 yamt /* 33 1.5.2.2 yamt * Copyright 2001, 2003 Wasabi Systems, Inc. 34 1.5.2.2 yamt * All rights reserved. 35 1.5.2.2 yamt * 36 1.5.2.2 yamt * Written by Jason R. Thorpe for Wasabi Systems, Inc. 37 1.5.2.2 yamt * 38 1.5.2.2 yamt * Redistribution and use in source and binary forms, with or without 39 1.5.2.2 yamt * modification, are permitted provided that the following conditions 40 1.5.2.2 yamt * are met: 41 1.5.2.2 yamt * 1. Redistributions of source code must retain the above copyright 42 1.5.2.2 yamt * notice, this list of conditions and the following disclaimer. 43 1.5.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 44 1.5.2.2 yamt * notice, this list of conditions and the following disclaimer in the 45 1.5.2.2 yamt * documentation and/or other materials provided with the distribution. 46 1.5.2.2 yamt * 3. All advertising materials mentioning features or use of this software 47 1.5.2.2 yamt * must display the following acknowledgement: 48 1.5.2.2 yamt * This product includes software developed for the NetBSD Project by 49 1.5.2.2 yamt * Wasabi Systems, Inc. 50 1.5.2.2 yamt * 4. The name of Wasabi Systems, Inc. may not be used to endorse 51 1.5.2.2 yamt * or promote products derived from this software without specific prior 52 1.5.2.2 yamt * written permission. 53 1.5.2.2 yamt * 54 1.5.2.2 yamt * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 55 1.5.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 56 1.5.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 57 1.5.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 58 1.5.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 59 1.5.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 60 1.5.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 61 1.5.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 62 1.5.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 63 1.5.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 64 1.5.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 65 1.5.2.2 yamt */ 66 1.5.2.2 yamt 67 1.5.2.2 yamt #include <sys/cdefs.h> 68 1.5.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: acpi_util.c,v 1.5.2.2 2010/08/11 22:53:16 yamt Exp $"); 69 1.5.2.2 yamt 70 1.5.2.2 yamt #include <sys/param.h> 71 1.5.2.2 yamt 72 1.5.2.2 yamt #include <dev/acpi/acpireg.h> 73 1.5.2.2 yamt #include <dev/acpi/acpivar.h> 74 1.5.2.2 yamt 75 1.5.2.2 yamt #define _COMPONENT ACPI_BUS_COMPONENT 76 1.5.2.2 yamt ACPI_MODULE_NAME ("acpi_util") 77 1.5.2.2 yamt 78 1.5.2.2 yamt static void acpi_clean_node(ACPI_HANDLE, void *); 79 1.5.2.2 yamt 80 1.5.2.2 yamt /* 81 1.5.2.2 yamt * Evaluate an integer object. 82 1.5.2.2 yamt */ 83 1.5.2.2 yamt ACPI_STATUS 84 1.5.2.2 yamt acpi_eval_integer(ACPI_HANDLE handle, const char *path, ACPI_INTEGER *valp) 85 1.5.2.2 yamt { 86 1.5.2.2 yamt ACPI_OBJECT obj; 87 1.5.2.2 yamt ACPI_BUFFER buf; 88 1.5.2.2 yamt ACPI_STATUS rv; 89 1.5.2.2 yamt 90 1.5.2.2 yamt if (handle == NULL) 91 1.5.2.2 yamt handle = ACPI_ROOT_OBJECT; 92 1.5.2.2 yamt 93 1.5.2.2 yamt buf.Pointer = &obj; 94 1.5.2.2 yamt buf.Length = sizeof(obj); 95 1.5.2.2 yamt 96 1.5.2.2 yamt rv = AcpiEvaluateObject(handle, path, NULL, &buf); 97 1.5.2.2 yamt 98 1.5.2.2 yamt if (ACPI_FAILURE(rv)) 99 1.5.2.2 yamt return rv; 100 1.5.2.2 yamt 101 1.5.2.2 yamt if (obj.Type != ACPI_TYPE_INTEGER) 102 1.5.2.2 yamt return AE_TYPE; 103 1.5.2.2 yamt 104 1.5.2.2 yamt if (valp != NULL) 105 1.5.2.2 yamt *valp = obj.Integer.Value; 106 1.5.2.2 yamt 107 1.5.2.2 yamt return AE_OK; 108 1.5.2.2 yamt } 109 1.5.2.2 yamt 110 1.5.2.2 yamt /* 111 1.5.2.2 yamt * Evaluate an integer object with a single integer input parameter. 112 1.5.2.2 yamt */ 113 1.5.2.2 yamt ACPI_STATUS 114 1.5.2.2 yamt acpi_eval_set_integer(ACPI_HANDLE handle, const char *path, ACPI_INTEGER val) 115 1.5.2.2 yamt { 116 1.5.2.2 yamt ACPI_OBJECT_LIST arg; 117 1.5.2.2 yamt ACPI_OBJECT obj; 118 1.5.2.2 yamt 119 1.5.2.2 yamt if (handle == NULL) 120 1.5.2.2 yamt handle = ACPI_ROOT_OBJECT; 121 1.5.2.2 yamt 122 1.5.2.2 yamt obj.Type = ACPI_TYPE_INTEGER; 123 1.5.2.2 yamt obj.Integer.Value = val; 124 1.5.2.2 yamt 125 1.5.2.2 yamt arg.Count = 1; 126 1.5.2.2 yamt arg.Pointer = &obj; 127 1.5.2.2 yamt 128 1.5.2.2 yamt return AcpiEvaluateObject(handle, path, &arg, NULL); 129 1.5.2.2 yamt } 130 1.5.2.2 yamt 131 1.5.2.2 yamt /* 132 1.5.2.2 yamt * Evaluate a (Unicode) string object. 133 1.5.2.2 yamt */ 134 1.5.2.2 yamt ACPI_STATUS 135 1.5.2.2 yamt acpi_eval_string(ACPI_HANDLE handle, const char *path, char **stringp) 136 1.5.2.2 yamt { 137 1.5.2.2 yamt ACPI_OBJECT *obj; 138 1.5.2.2 yamt ACPI_BUFFER buf; 139 1.5.2.2 yamt ACPI_STATUS rv; 140 1.5.2.2 yamt 141 1.5.2.2 yamt rv = acpi_eval_struct(handle, path, &buf); 142 1.5.2.2 yamt 143 1.5.2.2 yamt if (ACPI_FAILURE(rv)) 144 1.5.2.2 yamt return rv; 145 1.5.2.2 yamt 146 1.5.2.2 yamt obj = buf.Pointer; 147 1.5.2.2 yamt 148 1.5.2.2 yamt if (obj->Type != ACPI_TYPE_STRING) { 149 1.5.2.2 yamt rv = AE_TYPE; 150 1.5.2.2 yamt goto out; 151 1.5.2.2 yamt } 152 1.5.2.2 yamt 153 1.5.2.2 yamt if (obj->String.Length == 0) { 154 1.5.2.2 yamt rv = AE_BAD_DATA; 155 1.5.2.2 yamt goto out; 156 1.5.2.2 yamt } 157 1.5.2.2 yamt 158 1.5.2.2 yamt *stringp = ACPI_ALLOCATE(obj->String.Length + 1); 159 1.5.2.2 yamt 160 1.5.2.2 yamt if (*stringp == NULL) { 161 1.5.2.2 yamt rv = AE_NO_MEMORY; 162 1.5.2.2 yamt goto out; 163 1.5.2.2 yamt } 164 1.5.2.2 yamt 165 1.5.2.2 yamt (void)memcpy(*stringp, obj->String.Pointer, obj->String.Length); 166 1.5.2.2 yamt 167 1.5.2.2 yamt (*stringp)[obj->String.Length] = '\0'; 168 1.5.2.2 yamt 169 1.5.2.2 yamt out: 170 1.5.2.2 yamt ACPI_FREE(buf.Pointer); 171 1.5.2.2 yamt 172 1.5.2.2 yamt return rv; 173 1.5.2.2 yamt } 174 1.5.2.2 yamt 175 1.5.2.2 yamt /* 176 1.5.2.2 yamt * Evaluate a structure. Caller must free buf.Pointer by ACPI_FREE(). 177 1.5.2.2 yamt */ 178 1.5.2.2 yamt ACPI_STATUS 179 1.5.2.2 yamt acpi_eval_struct(ACPI_HANDLE handle, const char *path, ACPI_BUFFER *buf) 180 1.5.2.2 yamt { 181 1.5.2.2 yamt 182 1.5.2.2 yamt if (handle == NULL) 183 1.5.2.2 yamt handle = ACPI_ROOT_OBJECT; 184 1.5.2.2 yamt 185 1.5.2.2 yamt buf->Pointer = NULL; 186 1.5.2.2 yamt buf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 187 1.5.2.2 yamt 188 1.5.2.2 yamt return AcpiEvaluateObject(handle, path, NULL, buf); 189 1.5.2.2 yamt } 190 1.5.2.2 yamt 191 1.5.2.2 yamt /* 192 1.5.2.2 yamt * Evaluate a reference handle from an element in a package. 193 1.5.2.2 yamt */ 194 1.5.2.2 yamt ACPI_STATUS 195 1.5.2.2 yamt acpi_eval_reference_handle(ACPI_OBJECT *elm, ACPI_HANDLE *handle) 196 1.5.2.2 yamt { 197 1.5.2.2 yamt 198 1.5.2.2 yamt if (elm == NULL || handle == NULL) 199 1.5.2.2 yamt return AE_BAD_PARAMETER; 200 1.5.2.2 yamt 201 1.5.2.2 yamt switch (elm->Type) { 202 1.5.2.2 yamt 203 1.5.2.2 yamt case ACPI_TYPE_ANY: 204 1.5.2.2 yamt case ACPI_TYPE_LOCAL_REFERENCE: 205 1.5.2.2 yamt 206 1.5.2.2 yamt if (elm->Reference.Handle == NULL) 207 1.5.2.2 yamt return AE_NULL_ENTRY; 208 1.5.2.2 yamt 209 1.5.2.2 yamt *handle = elm->Reference.Handle; 210 1.5.2.2 yamt 211 1.5.2.2 yamt return AE_OK; 212 1.5.2.2 yamt 213 1.5.2.2 yamt case ACPI_TYPE_STRING: 214 1.5.2.2 yamt return AcpiGetHandle(NULL, elm->String.Pointer, handle); 215 1.5.2.2 yamt 216 1.5.2.2 yamt default: 217 1.5.2.2 yamt return AE_TYPE; 218 1.5.2.2 yamt } 219 1.5.2.2 yamt } 220 1.5.2.2 yamt 221 1.5.2.2 yamt /* 222 1.5.2.2 yamt * Iterate over all objects in a package, and pass them all 223 1.5.2.2 yamt * to a function. If the called function returns non-AE_OK, 224 1.5.2.2 yamt * the iteration is stopped and that value is returned. 225 1.5.2.2 yamt */ 226 1.5.2.2 yamt ACPI_STATUS 227 1.5.2.2 yamt acpi_foreach_package_object(ACPI_OBJECT *pkg, 228 1.5.2.2 yamt ACPI_STATUS (*func)(ACPI_OBJECT *, void *), void *arg) 229 1.5.2.2 yamt { 230 1.5.2.2 yamt ACPI_STATUS rv = AE_OK; 231 1.5.2.2 yamt uint32_t i; 232 1.5.2.2 yamt 233 1.5.2.2 yamt if (pkg == NULL) 234 1.5.2.2 yamt return AE_BAD_PARAMETER; 235 1.5.2.2 yamt 236 1.5.2.2 yamt if (pkg->Type != ACPI_TYPE_PACKAGE) 237 1.5.2.2 yamt return AE_TYPE; 238 1.5.2.2 yamt 239 1.5.2.2 yamt for (i = 0; i < pkg->Package.Count; i++) { 240 1.5.2.2 yamt 241 1.5.2.2 yamt rv = (*func)(&pkg->Package.Elements[i], arg); 242 1.5.2.2 yamt 243 1.5.2.2 yamt if (ACPI_FAILURE(rv)) 244 1.5.2.2 yamt break; 245 1.5.2.2 yamt } 246 1.5.2.2 yamt 247 1.5.2.2 yamt return rv; 248 1.5.2.2 yamt } 249 1.5.2.2 yamt 250 1.5.2.2 yamt /* 251 1.5.2.2 yamt * Fetch data info the specified (empty) ACPI buffer. 252 1.5.2.2 yamt * Caller must free buf.Pointer by ACPI_FREE(). 253 1.5.2.2 yamt */ 254 1.5.2.2 yamt ACPI_STATUS 255 1.5.2.2 yamt acpi_get(ACPI_HANDLE handle, ACPI_BUFFER *buf, 256 1.5.2.2 yamt ACPI_STATUS (*getit)(ACPI_HANDLE, ACPI_BUFFER *)) 257 1.5.2.2 yamt { 258 1.5.2.2 yamt 259 1.5.2.2 yamt buf->Pointer = NULL; 260 1.5.2.2 yamt buf->Length = ACPI_ALLOCATE_LOCAL_BUFFER; 261 1.5.2.2 yamt 262 1.5.2.2 yamt return (*getit)(handle, buf); 263 1.5.2.2 yamt } 264 1.5.2.2 yamt 265 1.5.2.2 yamt /* 266 1.5.2.2 yamt * Get a device node from a handle. 267 1.5.2.2 yamt */ 268 1.5.2.2 yamt struct acpi_devnode * 269 1.5.2.2 yamt acpi_get_node(ACPI_HANDLE handle) 270 1.5.2.2 yamt { 271 1.5.2.2 yamt struct acpi_devnode *ad; 272 1.5.2.2 yamt ACPI_STATUS rv; 273 1.5.2.2 yamt 274 1.5.2.2 yamt if (handle == NULL) 275 1.5.2.2 yamt return NULL; 276 1.5.2.2 yamt 277 1.5.2.2 yamt rv = AcpiGetData(handle, acpi_clean_node, (void **)&ad); 278 1.5.2.2 yamt 279 1.5.2.2 yamt if (ACPI_FAILURE(rv)) 280 1.5.2.2 yamt return NULL; 281 1.5.2.2 yamt 282 1.5.2.2 yamt return ad; 283 1.5.2.2 yamt } 284 1.5.2.2 yamt 285 1.5.2.2 yamt /* 286 1.5.2.2 yamt * Associate a device node with a handle. 287 1.5.2.2 yamt */ 288 1.5.2.2 yamt void 289 1.5.2.2 yamt acpi_set_node(struct acpi_devnode *ad) 290 1.5.2.2 yamt { 291 1.5.2.2 yamt 292 1.5.2.2 yamt (void)AcpiAttachData(ad->ad_handle, acpi_clean_node, ad); 293 1.5.2.2 yamt } 294 1.5.2.2 yamt 295 1.5.2.2 yamt static void 296 1.5.2.2 yamt acpi_clean_node(ACPI_HANDLE handle, void *aux) 297 1.5.2.2 yamt { 298 1.5.2.2 yamt /* Nothing. */ 299 1.5.2.2 yamt } 300 1.5.2.2 yamt 301 1.5.2.2 yamt /* 302 1.5.2.2 yamt * Return a complete pathname from a handle. 303 1.5.2.2 yamt * 304 1.5.2.2 yamt * Note that the function uses static data storage; 305 1.5.2.2 yamt * if the data is needed for future use, it should be 306 1.5.2.2 yamt * copied before any subsequent calls overwrite it. 307 1.5.2.2 yamt */ 308 1.5.2.2 yamt const char * 309 1.5.2.2 yamt acpi_name(ACPI_HANDLE handle) 310 1.5.2.2 yamt { 311 1.5.2.2 yamt static char name[80]; 312 1.5.2.2 yamt ACPI_BUFFER buf; 313 1.5.2.2 yamt ACPI_STATUS rv; 314 1.5.2.2 yamt 315 1.5.2.2 yamt if (handle == NULL) 316 1.5.2.2 yamt handle = ACPI_ROOT_OBJECT; 317 1.5.2.2 yamt 318 1.5.2.2 yamt buf.Pointer = name; 319 1.5.2.2 yamt buf.Length = sizeof(name); 320 1.5.2.2 yamt 321 1.5.2.2 yamt rv = AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf); 322 1.5.2.2 yamt 323 1.5.2.2 yamt if (ACPI_FAILURE(rv)) 324 1.5.2.2 yamt return "UNKNOWN"; 325 1.5.2.2 yamt 326 1.5.2.2 yamt return name; 327 1.5.2.2 yamt } 328 1.5.2.2 yamt 329 1.5.2.2 yamt /* 330 1.5.2.2 yamt * Match given IDs against _HID and _CIDs. 331 1.5.2.2 yamt */ 332 1.5.2.2 yamt int 333 1.5.2.2 yamt acpi_match_hid(ACPI_DEVICE_INFO *ad, const char * const *ids) 334 1.5.2.2 yamt { 335 1.5.2.2 yamt uint32_t i, n; 336 1.5.2.2 yamt char *id; 337 1.5.2.2 yamt 338 1.5.2.2 yamt while (*ids) { 339 1.5.2.2 yamt 340 1.5.2.2 yamt if ((ad->Valid & ACPI_VALID_HID) != 0) { 341 1.5.2.2 yamt 342 1.5.2.2 yamt if (pmatch(ad->HardwareId.String, *ids, NULL) == 2) 343 1.5.2.2 yamt return 1; 344 1.5.2.2 yamt } 345 1.5.2.2 yamt 346 1.5.2.2 yamt if ((ad->Valid & ACPI_VALID_CID) != 0) { 347 1.5.2.2 yamt 348 1.5.2.2 yamt n = ad->CompatibleIdList.Count; 349 1.5.2.2 yamt 350 1.5.2.2 yamt for (i = 0; i < n; i++) { 351 1.5.2.2 yamt 352 1.5.2.2 yamt id = ad->CompatibleIdList.Ids[i].String; 353 1.5.2.2 yamt 354 1.5.2.2 yamt if (pmatch(id, *ids, NULL) == 2) 355 1.5.2.2 yamt return 1; 356 1.5.2.2 yamt } 357 1.5.2.2 yamt } 358 1.5.2.2 yamt 359 1.5.2.2 yamt ids++; 360 1.5.2.2 yamt } 361 1.5.2.2 yamt 362 1.5.2.2 yamt return 0; 363 1.5.2.2 yamt } 364 1.5.2.2 yamt 365
Indexes created Mon Sep 29 21:09:56 GMT 2025