]>
Commit | Line | Data |
---|---|---|
15b8dd53 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utids - support for device IDs - HID, UID, CID | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
b4e104ea | 8 | * Copyright (C) 2000 - 2011, Intel Corp. |
15b8dd53 BM |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | #include <acpi/acpi.h> | |
45 | #include "accommon.h" | |
46 | #include "acinterp.h" | |
47 | ||
48 | #define _COMPONENT ACPI_UTILITIES | |
49 | ACPI_MODULE_NAME("utids") | |
50 | ||
15b8dd53 BM |
51 | /******************************************************************************* |
52 | * | |
53 | * FUNCTION: acpi_ut_execute_HID | |
54 | * | |
55 | * PARAMETERS: device_node - Node for the device | |
56 | * return_id - Where the string HID is returned | |
57 | * | |
58 | * RETURN: Status | |
59 | * | |
60 | * DESCRIPTION: Executes the _HID control method that returns the hardware | |
61 | * ID of the device. The HID is either an 32-bit encoded EISAID | |
62 | * Integer or a String. A string is always returned. An EISAID | |
63 | * is converted to a string. | |
64 | * | |
65 | * NOTE: Internal function, no parameter validation | |
66 | * | |
67 | ******************************************************************************/ | |
15b8dd53 BM |
68 | acpi_status |
69 | acpi_ut_execute_HID(struct acpi_namespace_node *device_node, | |
70 | struct acpica_device_id **return_id) | |
71 | { | |
72 | union acpi_operand_object *obj_desc; | |
73 | struct acpica_device_id *hid; | |
74 | u32 length; | |
75 | acpi_status status; | |
76 | ||
77 | ACPI_FUNCTION_TRACE(ut_execute_HID); | |
78 | ||
79 | status = acpi_ut_evaluate_object(device_node, METHOD_NAME__HID, | |
80 | ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, | |
81 | &obj_desc); | |
82 | if (ACPI_FAILURE(status)) { | |
83 | return_ACPI_STATUS(status); | |
84 | } | |
85 | ||
86 | /* Get the size of the String to be returned, includes null terminator */ | |
87 | ||
88 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { | |
89 | length = ACPI_EISAID_STRING_SIZE; | |
90 | } else { | |
91 | length = obj_desc->string.length + 1; | |
92 | } | |
93 | ||
94 | /* Allocate a buffer for the HID */ | |
95 | ||
96 | hid = | |
97 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpica_device_id) + | |
98 | (acpi_size) length); | |
99 | if (!hid) { | |
100 | status = AE_NO_MEMORY; | |
101 | goto cleanup; | |
102 | } | |
103 | ||
104 | /* Area for the string starts after DEVICE_ID struct */ | |
105 | ||
106 | hid->string = ACPI_ADD_PTR(char, hid, sizeof(struct acpica_device_id)); | |
107 | ||
108 | /* Convert EISAID to a string or simply copy existing string */ | |
109 | ||
110 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { | |
111 | acpi_ex_eisa_id_to_string(hid->string, obj_desc->integer.value); | |
112 | } else { | |
34cf66e7 | 113 | ACPI_STRCPY(hid->string, obj_desc->string.pointer); |
15b8dd53 BM |
114 | } |
115 | ||
116 | hid->length = length; | |
117 | *return_id = hid; | |
118 | ||
119 | cleanup: | |
120 | ||
121 | /* On exit, we must delete the return object */ | |
122 | ||
123 | acpi_ut_remove_reference(obj_desc); | |
124 | return_ACPI_STATUS(status); | |
125 | } | |
126 | ||
127 | /******************************************************************************* | |
128 | * | |
129 | * FUNCTION: acpi_ut_execute_UID | |
130 | * | |
131 | * PARAMETERS: device_node - Node for the device | |
132 | * return_id - Where the string UID is returned | |
133 | * | |
134 | * RETURN: Status | |
135 | * | |
136 | * DESCRIPTION: Executes the _UID control method that returns the unique | |
137 | * ID of the device. The UID is either a 64-bit Integer (NOT an | |
138 | * EISAID) or a string. Always returns a string. A 64-bit integer | |
139 | * is converted to a decimal string. | |
140 | * | |
141 | * NOTE: Internal function, no parameter validation | |
142 | * | |
143 | ******************************************************************************/ | |
144 | ||
145 | acpi_status | |
146 | acpi_ut_execute_UID(struct acpi_namespace_node *device_node, | |
147 | struct acpica_device_id **return_id) | |
148 | { | |
149 | union acpi_operand_object *obj_desc; | |
150 | struct acpica_device_id *uid; | |
151 | u32 length; | |
152 | acpi_status status; | |
153 | ||
154 | ACPI_FUNCTION_TRACE(ut_execute_UID); | |
155 | ||
156 | status = acpi_ut_evaluate_object(device_node, METHOD_NAME__UID, | |
157 | ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, | |
158 | &obj_desc); | |
159 | if (ACPI_FAILURE(status)) { | |
160 | return_ACPI_STATUS(status); | |
161 | } | |
162 | ||
163 | /* Get the size of the String to be returned, includes null terminator */ | |
164 | ||
165 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { | |
166 | length = ACPI_MAX64_DECIMAL_DIGITS + 1; | |
167 | } else { | |
168 | length = obj_desc->string.length + 1; | |
169 | } | |
170 | ||
171 | /* Allocate a buffer for the UID */ | |
172 | ||
173 | uid = | |
174 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpica_device_id) + | |
175 | (acpi_size) length); | |
176 | if (!uid) { | |
177 | status = AE_NO_MEMORY; | |
178 | goto cleanup; | |
179 | } | |
180 | ||
181 | /* Area for the string starts after DEVICE_ID struct */ | |
182 | ||
183 | uid->string = ACPI_ADD_PTR(char, uid, sizeof(struct acpica_device_id)); | |
184 | ||
185 | /* Convert an Integer to string, or just copy an existing string */ | |
186 | ||
187 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { | |
188 | acpi_ex_integer_to_string(uid->string, obj_desc->integer.value); | |
189 | } else { | |
34cf66e7 | 190 | ACPI_STRCPY(uid->string, obj_desc->string.pointer); |
15b8dd53 BM |
191 | } |
192 | ||
193 | uid->length = length; | |
194 | *return_id = uid; | |
195 | ||
196 | cleanup: | |
197 | ||
198 | /* On exit, we must delete the return object */ | |
199 | ||
200 | acpi_ut_remove_reference(obj_desc); | |
201 | return_ACPI_STATUS(status); | |
202 | } | |
203 | ||
204 | /******************************************************************************* | |
205 | * | |
206 | * FUNCTION: acpi_ut_execute_CID | |
207 | * | |
208 | * PARAMETERS: device_node - Node for the device | |
209 | * return_cid_list - Where the CID list is returned | |
210 | * | |
211 | * RETURN: Status, list of CID strings | |
212 | * | |
213 | * DESCRIPTION: Executes the _CID control method that returns one or more | |
214 | * compatible hardware IDs for the device. | |
215 | * | |
216 | * NOTE: Internal function, no parameter validation | |
217 | * | |
218 | * A _CID method can return either a single compatible ID or a package of | |
219 | * compatible IDs. Each compatible ID can be one of the following: | |
220 | * 1) Integer (32 bit compressed EISA ID) or | |
221 | * 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss") | |
222 | * | |
223 | * The Integer CIDs are converted to string format by this function. | |
224 | * | |
225 | ******************************************************************************/ | |
226 | ||
227 | acpi_status | |
228 | acpi_ut_execute_CID(struct acpi_namespace_node *device_node, | |
229 | struct acpica_device_id_list **return_cid_list) | |
230 | { | |
231 | union acpi_operand_object **cid_objects; | |
232 | union acpi_operand_object *obj_desc; | |
233 | struct acpica_device_id_list *cid_list; | |
234 | char *next_id_string; | |
235 | u32 string_area_size; | |
236 | u32 length; | |
237 | u32 cid_list_size; | |
238 | acpi_status status; | |
239 | u32 count; | |
240 | u32 i; | |
241 | ||
242 | ACPI_FUNCTION_TRACE(ut_execute_CID); | |
243 | ||
244 | /* Evaluate the _CID method for this device */ | |
245 | ||
246 | status = acpi_ut_evaluate_object(device_node, METHOD_NAME__CID, | |
247 | ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | |
248 | | ACPI_BTYPE_PACKAGE, &obj_desc); | |
249 | if (ACPI_FAILURE(status)) { | |
250 | return_ACPI_STATUS(status); | |
251 | } | |
252 | ||
253 | /* | |
254 | * Get the count and size of the returned _CIDs. _CID can return either | |
255 | * a Package of Integers/Strings or a single Integer or String. | |
256 | * Note: This section also validates that all CID elements are of the | |
257 | * correct type (Integer or String). | |
258 | */ | |
259 | if (obj_desc->common.type == ACPI_TYPE_PACKAGE) { | |
260 | count = obj_desc->package.count; | |
261 | cid_objects = obj_desc->package.elements; | |
262 | } else { /* Single Integer or String CID */ | |
263 | ||
264 | count = 1; | |
265 | cid_objects = &obj_desc; | |
266 | } | |
267 | ||
268 | string_area_size = 0; | |
269 | for (i = 0; i < count; i++) { | |
270 | ||
271 | /* String lengths include null terminator */ | |
272 | ||
273 | switch (cid_objects[i]->common.type) { | |
274 | case ACPI_TYPE_INTEGER: | |
275 | string_area_size += ACPI_EISAID_STRING_SIZE; | |
276 | break; | |
277 | ||
278 | case ACPI_TYPE_STRING: | |
279 | string_area_size += cid_objects[i]->string.length + 1; | |
280 | break; | |
281 | ||
282 | default: | |
283 | status = AE_TYPE; | |
284 | goto cleanup; | |
285 | } | |
286 | } | |
287 | ||
288 | /* | |
289 | * Now that we know the length of the CIDs, allocate return buffer: | |
290 | * 1) Size of the base structure + | |
291 | * 2) Size of the CID DEVICE_ID array + | |
292 | * 3) Size of the actual CID strings | |
293 | */ | |
294 | cid_list_size = sizeof(struct acpica_device_id_list) + | |
295 | ((count - 1) * sizeof(struct acpica_device_id)) + string_area_size; | |
296 | ||
297 | cid_list = ACPI_ALLOCATE_ZEROED(cid_list_size); | |
298 | if (!cid_list) { | |
299 | status = AE_NO_MEMORY; | |
300 | goto cleanup; | |
301 | } | |
302 | ||
303 | /* Area for CID strings starts after the CID DEVICE_ID array */ | |
304 | ||
305 | next_id_string = ACPI_CAST_PTR(char, cid_list->ids) + | |
306 | ((acpi_size) count * sizeof(struct acpica_device_id)); | |
307 | ||
308 | /* Copy/convert the CIDs to the return buffer */ | |
309 | ||
310 | for (i = 0; i < count; i++) { | |
311 | if (cid_objects[i]->common.type == ACPI_TYPE_INTEGER) { | |
312 | ||
313 | /* Convert the Integer (EISAID) CID to a string */ | |
314 | ||
315 | acpi_ex_eisa_id_to_string(next_id_string, | |
316 | cid_objects[i]->integer. | |
317 | value); | |
318 | length = ACPI_EISAID_STRING_SIZE; | |
319 | } else { /* ACPI_TYPE_STRING */ | |
320 | ||
321 | /* Copy the String CID from the returned object */ | |
322 | ||
34cf66e7 BM |
323 | ACPI_STRCPY(next_id_string, |
324 | cid_objects[i]->string.pointer); | |
15b8dd53 BM |
325 | length = cid_objects[i]->string.length + 1; |
326 | } | |
327 | ||
328 | cid_list->ids[i].string = next_id_string; | |
329 | cid_list->ids[i].length = length; | |
330 | next_id_string += length; | |
331 | } | |
332 | ||
333 | /* Finish the CID list */ | |
334 | ||
335 | cid_list->count = count; | |
336 | cid_list->list_size = cid_list_size; | |
337 | *return_cid_list = cid_list; | |
338 | ||
339 | cleanup: | |
340 | ||
341 | /* On exit, we must delete the _CID return object */ | |
342 | ||
343 | acpi_ut_remove_reference(obj_desc); | |
344 | return_ACPI_STATUS(status); | |
345 | } |