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1da177e4 LT |
1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
25 | #include <linux/module.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/ioport.h> | |
d568df84 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | #include <linux/list.h> |
30 | #include <linux/sched.h> | |
31 | #include <linux/pm.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/proc_fs.h> | |
6697c052 | 34 | #include <linux/acpi.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 LT |
36 | #ifdef CONFIG_X86 |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
7752d5cf | 39 | #include <linux/pci.h> |
1da177e4 LT |
40 | #include <acpi/acpi_bus.h> |
41 | #include <acpi/acpi_drivers.h> | |
eb27cae8 | 42 | #include <linux/dmi.h> |
1da177e4 | 43 | |
e60cc7a6 BH |
44 | #include "internal.h" |
45 | ||
1da177e4 | 46 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 47 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 48 | |
4be44fcd LB |
49 | struct acpi_device *acpi_root; |
50 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
51 | EXPORT_SYMBOL(acpi_root_dir); |
52 | ||
53 | #define STRUCT_TO_INT(s) (*((int*)&s)) | |
54 | ||
6415e12b ZY |
55 | static int set_power_nocheck(const struct dmi_system_id *id) |
56 | { | |
57 | printk(KERN_NOTICE PREFIX "%s detected - " | |
58f87ed0 | 58 | "disable power check in power transition\n", id->ident); |
6415e12b ZY |
59 | acpi_power_nocheck = 1; |
60 | return 0; | |
61 | } | |
62 | static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { | |
63 | { | |
64 | set_power_nocheck, "HP Pavilion 05", { | |
65 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
66 | DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), | |
67 | DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, | |
68 | {}, | |
69 | }; | |
70 | ||
71 | ||
cce4f632 | 72 | #ifdef CONFIG_X86 |
aa2110cb LM |
73 | static int set_copy_dsdt(const struct dmi_system_id *id) |
74 | { | |
75 | printk(KERN_NOTICE "%s detected - " | |
76 | "force copy of DSDT to local memory\n", id->ident); | |
77 | acpi_gbl_copy_dsdt_locally = 1; | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
82 | /* | |
100cf877 | 83 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
84 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
85 | */ | |
86 | { | |
87 | .callback = set_copy_dsdt, | |
100cf877 | 88 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
89 | .matches = { |
90 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 91 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 92 | }, |
cce4f632 LM |
93 | }, |
94 | {} | |
aa2110cb | 95 | }; |
cce4f632 LM |
96 | #else |
97 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
98 | {} | |
99 | }; | |
100 | #endif | |
aa2110cb | 101 | |
1da177e4 LT |
102 | /* -------------------------------------------------------------------------- |
103 | Device Management | |
104 | -------------------------------------------------------------------------- */ | |
105 | ||
4be44fcd | 106 | int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 107 | { |
4be44fcd | 108 | acpi_status status = AE_OK; |
1da177e4 | 109 | |
1da177e4 LT |
110 | |
111 | if (!device) | |
d550d98d | 112 | return -EINVAL; |
1da177e4 LT |
113 | |
114 | /* TBD: Support fixed-feature devices */ | |
115 | ||
4be44fcd | 116 | status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); |
1da177e4 | 117 | if (ACPI_FAILURE(status) || !*device) { |
9805cb76 LB |
118 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", |
119 | handle)); | |
d550d98d | 120 | return -ENODEV; |
1da177e4 LT |
121 | } |
122 | ||
d550d98d | 123 | return 0; |
1da177e4 | 124 | } |
4be44fcd | 125 | |
1da177e4 LT |
126 | EXPORT_SYMBOL(acpi_bus_get_device); |
127 | ||
402ac536 BH |
128 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
129 | unsigned long long *sta) | |
1da177e4 | 130 | { |
402ac536 | 131 | acpi_status status; |
4be44fcd | 132 | |
402ac536 BH |
133 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
134 | if (ACPI_SUCCESS(status)) | |
135 | return AE_OK; | |
1da177e4 | 136 | |
402ac536 BH |
137 | if (status == AE_NOT_FOUND) { |
138 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
139 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
140 | return AE_OK; | |
1da177e4 | 141 | } |
402ac536 BH |
142 | return status; |
143 | } | |
1da177e4 | 144 | |
402ac536 BH |
145 | int acpi_bus_get_status(struct acpi_device *device) |
146 | { | |
147 | acpi_status status; | |
148 | unsigned long long sta; | |
149 | ||
150 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
151 | if (ACPI_FAILURE(status)) | |
152 | return -ENODEV; | |
153 | ||
154 | STRUCT_TO_INT(device->status) = (int) sta; | |
1da177e4 LT |
155 | |
156 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
157 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
158 | "functional but not present;\n", | |
159 | device->pnp.bus_id, | |
160 | (u32) STRUCT_TO_INT(device->status))); | |
1da177e4 LT |
161 | } |
162 | ||
4be44fcd LB |
163 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
164 | device->pnp.bus_id, | |
165 | (u32) STRUCT_TO_INT(device->status))); | |
d550d98d | 166 | return 0; |
1da177e4 | 167 | } |
4be44fcd | 168 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 169 | |
20733939 | 170 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 171 | void *context) |
20733939 ZR |
172 | { |
173 | return; | |
174 | } | |
175 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
176 | ||
177 | int acpi_bus_get_private_data(acpi_handle handle, void **data) | |
178 | { | |
179 | acpi_status status = AE_OK; | |
180 | ||
181 | if (!*data) | |
182 | return -EINVAL; | |
183 | ||
184 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
185 | if (ACPI_FAILURE(status) || !*data) { | |
186 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n", | |
187 | handle)); | |
188 | return -ENODEV; | |
189 | } | |
190 | ||
191 | return 0; | |
192 | } | |
193 | EXPORT_SYMBOL(acpi_bus_get_private_data); | |
194 | ||
1da177e4 LT |
195 | /* -------------------------------------------------------------------------- |
196 | Power Management | |
197 | -------------------------------------------------------------------------- */ | |
198 | ||
5e6d4fe4 | 199 | static int __acpi_bus_get_power(struct acpi_device *device, int *state) |
1da177e4 | 200 | { |
4be44fcd LB |
201 | int result = 0; |
202 | acpi_status status = 0; | |
27663c58 | 203 | unsigned long long psc = 0; |
1da177e4 | 204 | |
5e6d4fe4 RW |
205 | if (!device || !state) |
206 | return -EINVAL; | |
1da177e4 LT |
207 | |
208 | *state = ACPI_STATE_UNKNOWN; | |
209 | ||
5e6d4fe4 | 210 | if (device->flags.power_manageable) { |
1da177e4 | 211 | /* |
aafbcd16 | 212 | * Get the device's power state either directly (via _PSC) or |
1da177e4 LT |
213 | * indirectly (via power resources). |
214 | */ | |
0c99c528 | 215 | if (device->power.flags.power_resources) { |
5e6d4fe4 | 216 | result = acpi_power_get_inferred_state(device, state); |
0c99c528 ZR |
217 | if (result) |
218 | return result; | |
219 | } else if (device->power.flags.explicit_get) { | |
4be44fcd LB |
220 | status = acpi_evaluate_integer(device->handle, "_PSC", |
221 | NULL, &psc); | |
1da177e4 | 222 | if (ACPI_FAILURE(status)) |
d550d98d | 223 | return -ENODEV; |
5e6d4fe4 | 224 | *state = (int)psc; |
1da177e4 | 225 | } |
5e6d4fe4 RW |
226 | } else { |
227 | /* TBD: Non-recursive algorithm for walking up hierarchy. */ | |
228 | *state = device->parent ? | |
229 | device->parent->power.state : ACPI_STATE_D0; | |
1da177e4 LT |
230 | } |
231 | ||
232 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", | |
5e6d4fe4 | 233 | device->pnp.bus_id, *state)); |
1da177e4 | 234 | |
d550d98d | 235 | return 0; |
1da177e4 | 236 | } |
1da177e4 | 237 | |
5e6d4fe4 RW |
238 | |
239 | int acpi_bus_get_power(acpi_handle handle, int *state) | |
240 | { | |
241 | struct acpi_device *device; | |
242 | int result; | |
243 | ||
244 | result = acpi_bus_get_device(handle, &device); | |
245 | if (result) | |
246 | return result; | |
247 | ||
248 | result = __acpi_bus_get_power(device, state); | |
249 | if (result) | |
250 | return result; | |
251 | ||
252 | device->power.state = *state; | |
253 | return 0; | |
254 | } | |
4be44fcd | 255 | EXPORT_SYMBOL(acpi_bus_get_power); |
1da177e4 | 256 | |
5e6d4fe4 | 257 | |
4be44fcd | 258 | int acpi_bus_set_power(acpi_handle handle, int state) |
1da177e4 | 259 | { |
4be44fcd LB |
260 | int result = 0; |
261 | acpi_status status = AE_OK; | |
262 | struct acpi_device *device = NULL; | |
263 | char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; | |
1da177e4 | 264 | |
1da177e4 LT |
265 | |
266 | result = acpi_bus_get_device(handle, &device); | |
267 | if (result) | |
d550d98d | 268 | return result; |
1da177e4 LT |
269 | |
270 | if ((state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) | |
d550d98d | 271 | return -EINVAL; |
1da177e4 LT |
272 | |
273 | /* Make sure this is a valid target state */ | |
274 | ||
275 | if (!device->flags.power_manageable) { | |
9805cb76 | 276 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device `[%s]' is not power manageable\n", |
19c38de8 | 277 | kobject_name(&device->dev.kobj))); |
d550d98d | 278 | return -ENODEV; |
1da177e4 | 279 | } |
b913100d | 280 | /* |
c35923bc | 281 | * Get device's current power state |
b913100d | 282 | */ |
f5adfaa3 ZY |
283 | if (!acpi_power_nocheck) { |
284 | /* | |
285 | * Maybe the incorrect power state is returned on the bogus | |
286 | * bios, which is different with the real power state. | |
287 | * For example: the bios returns D0 state and the real power | |
288 | * state is D3. OS expects to set the device to D0 state. In | |
289 | * such case if OS uses the power state returned by the BIOS, | |
290 | * the device can't be transisted to the correct power state. | |
291 | * So if the acpi_power_nocheck is set, it is unnecessary to | |
292 | * get the power state by calling acpi_bus_get_power. | |
293 | */ | |
294 | acpi_bus_get_power(device->handle, &device->power.state); | |
295 | } | |
ec68373c | 296 | if ((state == device->power.state) && !device->flags.force_power_state) { |
b1028c54 KK |
297 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", |
298 | state)); | |
299 | return 0; | |
1da177e4 | 300 | } |
b1028c54 | 301 | |
1da177e4 | 302 | if (!device->power.states[state].flags.valid) { |
cece9296 | 303 | printk(KERN_WARNING PREFIX "Device does not support D%d\n", state); |
d550d98d | 304 | return -ENODEV; |
1da177e4 LT |
305 | } |
306 | if (device->parent && (state < device->parent->power.state)) { | |
cece9296 | 307 | printk(KERN_WARNING PREFIX |
a6fc6720 | 308 | "Cannot set device to a higher-powered" |
cece9296 | 309 | " state than parent\n"); |
d550d98d | 310 | return -ENODEV; |
1da177e4 LT |
311 | } |
312 | ||
313 | /* | |
314 | * Transition Power | |
315 | * ---------------- | |
316 | * On transitions to a high-powered state we first apply power (via | |
317 | * power resources) then evalute _PSx. Conversly for transitions to | |
318 | * a lower-powered state. | |
b913100d | 319 | */ |
1da177e4 LT |
320 | if (state < device->power.state) { |
321 | if (device->power.flags.power_resources) { | |
322 | result = acpi_power_transition(device, state); | |
323 | if (result) | |
324 | goto end; | |
325 | } | |
326 | if (device->power.states[state].flags.explicit_set) { | |
4be44fcd LB |
327 | status = acpi_evaluate_object(device->handle, |
328 | object_name, NULL, NULL); | |
1da177e4 LT |
329 | if (ACPI_FAILURE(status)) { |
330 | result = -ENODEV; | |
331 | goto end; | |
332 | } | |
333 | } | |
4be44fcd | 334 | } else { |
1da177e4 | 335 | if (device->power.states[state].flags.explicit_set) { |
4be44fcd LB |
336 | status = acpi_evaluate_object(device->handle, |
337 | object_name, NULL, NULL); | |
1da177e4 LT |
338 | if (ACPI_FAILURE(status)) { |
339 | result = -ENODEV; | |
340 | goto end; | |
341 | } | |
342 | } | |
343 | if (device->power.flags.power_resources) { | |
344 | result = acpi_power_transition(device, state); | |
345 | if (result) | |
346 | goto end; | |
347 | } | |
348 | } | |
349 | ||
4be44fcd | 350 | end: |
1da177e4 | 351 | if (result) |
cece9296 | 352 | printk(KERN_WARNING PREFIX |
ddc50b6a | 353 | "Device [%s] failed to transition to D%d\n", |
cece9296 | 354 | device->pnp.bus_id, state); |
5e32132b SL |
355 | else { |
356 | device->power.state = state; | |
4be44fcd LB |
357 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
358 | "Device [%s] transitioned to D%d\n", | |
359 | device->pnp.bus_id, state)); | |
5e32132b | 360 | } |
1da177e4 | 361 | |
d550d98d | 362 | return result; |
1da177e4 | 363 | } |
1da177e4 | 364 | |
4be44fcd | 365 | EXPORT_SYMBOL(acpi_bus_set_power); |
1da177e4 | 366 | |
3737b2b1 RW |
367 | bool acpi_bus_power_manageable(acpi_handle handle) |
368 | { | |
369 | struct acpi_device *device; | |
370 | int result; | |
371 | ||
372 | result = acpi_bus_get_device(handle, &device); | |
373 | return result ? false : device->flags.power_manageable; | |
374 | } | |
375 | ||
376 | EXPORT_SYMBOL(acpi_bus_power_manageable); | |
377 | ||
eb9d0fe4 RW |
378 | bool acpi_bus_can_wakeup(acpi_handle handle) |
379 | { | |
380 | struct acpi_device *device; | |
381 | int result; | |
382 | ||
383 | result = acpi_bus_get_device(handle, &device); | |
384 | return result ? false : device->wakeup.flags.valid; | |
385 | } | |
386 | ||
387 | EXPORT_SYMBOL(acpi_bus_can_wakeup); | |
388 | ||
70023de8 SL |
389 | static void acpi_print_osc_error(acpi_handle handle, |
390 | struct acpi_osc_context *context, char *error) | |
391 | { | |
392 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
393 | int i; | |
394 | ||
395 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
396 | printk(KERN_DEBUG "%s\n", error); | |
397 | else { | |
398 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
399 | kfree(buffer.pointer); | |
400 | } | |
401 | printk(KERN_DEBUG"_OSC request data:"); | |
402 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
403 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
404 | printk("\n"); | |
405 | } | |
406 | ||
70023de8 SL |
407 | static acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
408 | { | |
409 | int i; | |
410 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
411 | 24, 26, 28, 30, 32, 34}; | |
412 | ||
413 | if (strlen(str) != 36) | |
414 | return AE_BAD_PARAMETER; | |
415 | for (i = 0; i < 36; i++) { | |
416 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
417 | if (str[i] != '-') | |
418 | return AE_BAD_PARAMETER; | |
419 | } else if (!isxdigit(str[i])) | |
420 | return AE_BAD_PARAMETER; | |
421 | } | |
422 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
423 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
424 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
425 | } |
426 | return AE_OK; | |
427 | } | |
428 | ||
429 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
430 | { | |
431 | acpi_status status; | |
432 | struct acpi_object_list input; | |
433 | union acpi_object in_params[4]; | |
434 | union acpi_object *out_obj; | |
435 | u8 uuid[16]; | |
436 | u32 errors; | |
9dc130fc | 437 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
438 | |
439 | if (!context) | |
440 | return AE_ERROR; | |
441 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
442 | return AE_ERROR; | |
443 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
444 | context->ret.pointer = NULL; | |
445 | ||
446 | /* Setting up input parameters */ | |
447 | input.count = 4; | |
448 | input.pointer = in_params; | |
449 | in_params[0].type = ACPI_TYPE_BUFFER; | |
450 | in_params[0].buffer.length = 16; | |
451 | in_params[0].buffer.pointer = uuid; | |
452 | in_params[1].type = ACPI_TYPE_INTEGER; | |
453 | in_params[1].integer.value = context->rev; | |
454 | in_params[2].type = ACPI_TYPE_INTEGER; | |
455 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
456 | in_params[3].type = ACPI_TYPE_BUFFER; | |
457 | in_params[3].buffer.length = context->cap.length; | |
458 | in_params[3].buffer.pointer = context->cap.pointer; | |
459 | ||
9dc130fc | 460 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
461 | if (ACPI_FAILURE(status)) |
462 | return status; | |
463 | ||
9dc130fc | 464 | if (!output.length) |
70023de8 SL |
465 | return AE_NULL_OBJECT; |
466 | ||
9dc130fc SL |
467 | out_obj = output.pointer; |
468 | if (out_obj->type != ACPI_TYPE_BUFFER | |
469 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
470 | acpi_print_osc_error(handle, context, |
471 | "_OSC evaluation returned wrong type"); | |
472 | status = AE_TYPE; | |
473 | goto out_kfree; | |
474 | } | |
475 | /* Need to ignore the bit0 in result code */ | |
476 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
477 | if (errors) { | |
478 | if (errors & OSC_REQUEST_ERROR) | |
479 | acpi_print_osc_error(handle, context, | |
480 | "_OSC request failed"); | |
481 | if (errors & OSC_INVALID_UUID_ERROR) | |
482 | acpi_print_osc_error(handle, context, | |
483 | "_OSC invalid UUID"); | |
484 | if (errors & OSC_INVALID_REVISION_ERROR) | |
485 | acpi_print_osc_error(handle, context, | |
486 | "_OSC invalid revision"); | |
487 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
488 | if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE] | |
489 | & OSC_QUERY_ENABLE) | |
490 | goto out_success; | |
491 | status = AE_SUPPORT; | |
492 | goto out_kfree; | |
493 | } | |
494 | status = AE_ERROR; | |
495 | goto out_kfree; | |
496 | } | |
497 | out_success: | |
9dc130fc SL |
498 | context->ret.length = out_obj->buffer.length; |
499 | context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); | |
500 | if (!context->ret.pointer) { | |
501 | status = AE_NO_MEMORY; | |
502 | goto out_kfree; | |
503 | } | |
504 | memcpy(context->ret.pointer, out_obj->buffer.pointer, | |
505 | context->ret.length); | |
506 | status = AE_OK; | |
70023de8 SL |
507 | |
508 | out_kfree: | |
9dc130fc SL |
509 | kfree(output.pointer); |
510 | if (status != AE_OK) | |
511 | context->ret.pointer = NULL; | |
70023de8 SL |
512 | return status; |
513 | } | |
514 | EXPORT_SYMBOL(acpi_run_osc); | |
515 | ||
3563ff96 SL |
516 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
517 | static void acpi_bus_osc_support(void) | |
518 | { | |
519 | u32 capbuf[2]; | |
520 | struct acpi_osc_context context = { | |
521 | .uuid_str = sb_uuid_str, | |
522 | .rev = 1, | |
523 | .cap.length = 8, | |
524 | .cap.pointer = capbuf, | |
525 | }; | |
526 | acpi_handle handle; | |
527 | ||
528 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; | |
529 | capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
6a4e2b75 ZY |
530 | #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ |
531 | defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) | |
3563ff96 SL |
532 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT; |
533 | #endif | |
6a4e2b75 ZY |
534 | |
535 | #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) | |
536 | capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT; | |
537 | #endif | |
3563ff96 SL |
538 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
539 | return; | |
540 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) | |
541 | kfree(context.ret.pointer); | |
542 | /* do we need to check the returned cap? Sounds no */ | |
543 | } | |
544 | ||
1da177e4 LT |
545 | /* -------------------------------------------------------------------------- |
546 | Event Management | |
547 | -------------------------------------------------------------------------- */ | |
548 | ||
14e04fb3 | 549 | #ifdef CONFIG_ACPI_PROC_EVENT |
1da177e4 LT |
550 | static DEFINE_SPINLOCK(acpi_bus_event_lock); |
551 | ||
552 | LIST_HEAD(acpi_bus_event_list); | |
553 | DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); | |
554 | ||
4be44fcd | 555 | extern int event_is_open; |
1da177e4 | 556 | |
8db85d4c | 557 | int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data) |
1da177e4 | 558 | { |
8db85d4c | 559 | struct acpi_bus_event *event; |
4be44fcd | 560 | unsigned long flags = 0; |
1da177e4 | 561 | |
1da177e4 LT |
562 | /* drop event on the floor if no one's listening */ |
563 | if (!event_is_open) | |
d550d98d | 564 | return 0; |
1da177e4 | 565 | |
5cc4a0f6 | 566 | event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC); |
1da177e4 | 567 | if (!event) |
d550d98d | 568 | return -ENOMEM; |
1da177e4 | 569 | |
8db85d4c AS |
570 | strcpy(event->device_class, device_class); |
571 | strcpy(event->bus_id, bus_id); | |
1da177e4 LT |
572 | event->type = type; |
573 | event->data = data; | |
574 | ||
575 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
576 | list_add_tail(&event->node, &acpi_bus_event_list); | |
577 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); | |
578 | ||
579 | wake_up_interruptible(&acpi_bus_event_queue); | |
580 | ||
d550d98d | 581 | return 0; |
8db85d4c AS |
582 | |
583 | } | |
584 | ||
585 | EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4); | |
586 | ||
587 | int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data) | |
588 | { | |
589 | if (!device) | |
590 | return -EINVAL; | |
591 | return acpi_bus_generate_proc_event4(device->pnp.device_class, | |
592 | device->pnp.bus_id, type, data); | |
1da177e4 | 593 | } |
4be44fcd | 594 | |
14e04fb3 | 595 | EXPORT_SYMBOL(acpi_bus_generate_proc_event); |
1da177e4 | 596 | |
4be44fcd | 597 | int acpi_bus_receive_event(struct acpi_bus_event *event) |
1da177e4 | 598 | { |
4be44fcd LB |
599 | unsigned long flags = 0; |
600 | struct acpi_bus_event *entry = NULL; | |
1da177e4 LT |
601 | |
602 | DECLARE_WAITQUEUE(wait, current); | |
603 | ||
1da177e4 LT |
604 | |
605 | if (!event) | |
d550d98d | 606 | return -EINVAL; |
1da177e4 LT |
607 | |
608 | if (list_empty(&acpi_bus_event_list)) { | |
609 | ||
610 | set_current_state(TASK_INTERRUPTIBLE); | |
611 | add_wait_queue(&acpi_bus_event_queue, &wait); | |
612 | ||
613 | if (list_empty(&acpi_bus_event_list)) | |
614 | schedule(); | |
615 | ||
616 | remove_wait_queue(&acpi_bus_event_queue, &wait); | |
617 | set_current_state(TASK_RUNNING); | |
618 | ||
619 | if (signal_pending(current)) | |
d550d98d | 620 | return -ERESTARTSYS; |
1da177e4 LT |
621 | } |
622 | ||
623 | spin_lock_irqsave(&acpi_bus_event_lock, flags); | |
f0a37e00 CE |
624 | if (!list_empty(&acpi_bus_event_list)) { |
625 | entry = list_entry(acpi_bus_event_list.next, | |
626 | struct acpi_bus_event, node); | |
1da177e4 | 627 | list_del(&entry->node); |
f0a37e00 | 628 | } |
1da177e4 LT |
629 | spin_unlock_irqrestore(&acpi_bus_event_lock, flags); |
630 | ||
631 | if (!entry) | |
d550d98d | 632 | return -ENODEV; |
1da177e4 LT |
633 | |
634 | memcpy(event, entry, sizeof(struct acpi_bus_event)); | |
635 | ||
636 | kfree(entry); | |
637 | ||
d550d98d | 638 | return 0; |
1da177e4 | 639 | } |
1da177e4 | 640 | |
14e04fb3 | 641 | #endif /* CONFIG_ACPI_PROC_EVENT */ |
1da177e4 LT |
642 | |
643 | /* -------------------------------------------------------------------------- | |
644 | Notification Handling | |
645 | -------------------------------------------------------------------------- */ | |
646 | ||
ff754e2e | 647 | static void acpi_bus_check_device(acpi_handle handle) |
1da177e4 | 648 | { |
ff754e2e | 649 | struct acpi_device *device; |
cdd5b8ca | 650 | acpi_status status; |
1da177e4 LT |
651 | struct acpi_device_status old_status; |
652 | ||
ff754e2e BH |
653 | if (acpi_bus_get_device(handle, &device)) |
654 | return; | |
1da177e4 | 655 | if (!device) |
cdd5b8ca | 656 | return; |
1da177e4 | 657 | |
1da177e4 LT |
658 | old_status = device->status; |
659 | ||
660 | /* | |
661 | * Make sure this device's parent is present before we go about | |
662 | * messing with the device. | |
663 | */ | |
664 | if (device->parent && !device->parent->status.present) { | |
665 | device->status = device->parent->status; | |
cdd5b8ca | 666 | return; |
1da177e4 LT |
667 | } |
668 | ||
669 | status = acpi_bus_get_status(device); | |
670 | if (ACPI_FAILURE(status)) | |
cdd5b8ca | 671 | return; |
1da177e4 LT |
672 | |
673 | if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status)) | |
cdd5b8ca | 674 | return; |
1da177e4 | 675 | |
1da177e4 LT |
676 | /* |
677 | * Device Insertion/Removal | |
678 | */ | |
679 | if ((device->status.present) && !(old_status.present)) { | |
680 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); | |
681 | /* TBD: Handle device insertion */ | |
4be44fcd | 682 | } else if (!(device->status.present) && (old_status.present)) { |
1da177e4 LT |
683 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); |
684 | /* TBD: Handle device removal */ | |
685 | } | |
1da177e4 LT |
686 | } |
687 | ||
ff754e2e | 688 | static void acpi_bus_check_scope(acpi_handle handle) |
1da177e4 | 689 | { |
1da177e4 | 690 | /* Status Change? */ |
ff754e2e | 691 | acpi_bus_check_device(handle); |
1da177e4 | 692 | |
1da177e4 LT |
693 | /* |
694 | * TBD: Enumerate child devices within this device's scope and | |
695 | * run acpi_bus_check_device()'s on them. | |
696 | */ | |
1da177e4 LT |
697 | } |
698 | ||
6bd00a61 SL |
699 | static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); |
700 | int register_acpi_bus_notifier(struct notifier_block *nb) | |
701 | { | |
702 | return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); | |
703 | } | |
704 | EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); | |
705 | ||
706 | void unregister_acpi_bus_notifier(struct notifier_block *nb) | |
707 | { | |
708 | blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); | |
709 | } | |
710 | EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); | |
711 | ||
1da177e4 LT |
712 | /** |
713 | * acpi_bus_notify | |
714 | * --------------- | |
715 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
716 | */ | |
4be44fcd | 717 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 718 | { |
4be44fcd | 719 | struct acpi_device *device = NULL; |
6d278131 | 720 | struct acpi_driver *driver; |
1da177e4 | 721 | |
02c37bd8 BH |
722 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n", |
723 | type, handle)); | |
724 | ||
6bd00a61 SL |
725 | blocking_notifier_call_chain(&acpi_bus_notify_list, |
726 | type, (void *)handle); | |
1da177e4 | 727 | |
1da177e4 LT |
728 | switch (type) { |
729 | ||
730 | case ACPI_NOTIFY_BUS_CHECK: | |
ff754e2e | 731 | acpi_bus_check_scope(handle); |
aafbcd16 | 732 | /* |
1da177e4 | 733 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 734 | * drivers via the device manager (device.c). |
1da177e4 LT |
735 | */ |
736 | break; | |
737 | ||
738 | case ACPI_NOTIFY_DEVICE_CHECK: | |
ff754e2e | 739 | acpi_bus_check_device(handle); |
aafbcd16 | 740 | /* |
1da177e4 | 741 | * TBD: We'll need to outsource certain events to non-ACPI |
4be44fcd | 742 | * drivers via the device manager (device.c). |
1da177e4 LT |
743 | */ |
744 | break; | |
745 | ||
746 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1da177e4 LT |
747 | /* TBD */ |
748 | break; | |
749 | ||
750 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1da177e4 LT |
751 | /* TBD */ |
752 | break; | |
753 | ||
754 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1da177e4 LT |
755 | /* TBD: Exactly what does 'light' mean? */ |
756 | break; | |
757 | ||
758 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1da177e4 LT |
759 | /* TBD */ |
760 | break; | |
761 | ||
762 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1da177e4 LT |
763 | /* TBD */ |
764 | break; | |
765 | ||
766 | case ACPI_NOTIFY_POWER_FAULT: | |
1da177e4 LT |
767 | /* TBD */ |
768 | break; | |
769 | ||
770 | default: | |
4be44fcd LB |
771 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
772 | "Received unknown/unsupported notification [%08x]\n", | |
773 | type)); | |
1da177e4 LT |
774 | break; |
775 | } | |
776 | ||
ff754e2e BH |
777 | acpi_bus_get_device(handle, &device); |
778 | if (device) { | |
779 | driver = device->driver; | |
780 | if (driver && driver->ops.notify && | |
781 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
782 | driver->ops.notify(device, type); | |
783 | } | |
1da177e4 LT |
784 | } |
785 | ||
786 | /* -------------------------------------------------------------------------- | |
787 | Initialization/Cleanup | |
788 | -------------------------------------------------------------------------- */ | |
789 | ||
4be44fcd | 790 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 791 | { |
4be44fcd LB |
792 | acpi_status status = AE_OK; |
793 | union acpi_object arg = { ACPI_TYPE_INTEGER }; | |
794 | struct acpi_object_list arg_list = { 1, &arg }; | |
795 | char *message = NULL; | |
1da177e4 | 796 | |
1da177e4 | 797 | |
aafbcd16 | 798 | /* |
1da177e4 LT |
799 | * Let the system know what interrupt model we are using by |
800 | * evaluating the \_PIC object, if exists. | |
801 | */ | |
802 | ||
803 | switch (acpi_irq_model) { | |
804 | case ACPI_IRQ_MODEL_PIC: | |
805 | message = "PIC"; | |
806 | break; | |
807 | case ACPI_IRQ_MODEL_IOAPIC: | |
808 | message = "IOAPIC"; | |
809 | break; | |
810 | case ACPI_IRQ_MODEL_IOSAPIC: | |
811 | message = "IOSAPIC"; | |
812 | break; | |
3948ec94 JK |
813 | case ACPI_IRQ_MODEL_PLATFORM: |
814 | message = "platform specific model"; | |
815 | break; | |
1da177e4 LT |
816 | default: |
817 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 818 | return -ENODEV; |
1da177e4 LT |
819 | } |
820 | ||
821 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
822 | ||
823 | arg.integer.value = acpi_irq_model; | |
824 | ||
825 | status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL); | |
826 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { | |
a6fc6720 | 827 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 828 | return -ENODEV; |
1da177e4 LT |
829 | } |
830 | ||
d550d98d | 831 | return 0; |
1da177e4 LT |
832 | } |
833 | ||
67a119f9 | 834 | u8 acpi_gbl_permanent_mmap; |
ad71860a AS |
835 | |
836 | ||
4be44fcd | 837 | void __init acpi_early_init(void) |
1da177e4 | 838 | { |
4be44fcd | 839 | acpi_status status = AE_OK; |
1da177e4 LT |
840 | |
841 | if (acpi_disabled) | |
d550d98d | 842 | return; |
1da177e4 | 843 | |
61686124 BM |
844 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
845 | ||
1da177e4 LT |
846 | /* enable workarounds, unless strict ACPI spec. compliance */ |
847 | if (!acpi_strict) | |
848 | acpi_gbl_enable_interpreter_slack = TRUE; | |
849 | ||
ad71860a AS |
850 | acpi_gbl_permanent_mmap = 1; |
851 | ||
aa2110cb LM |
852 | /* |
853 | * If the machine falls into the DMI check table, | |
854 | * DSDT will be copied to memory | |
855 | */ | |
856 | dmi_check_system(dsdt_dmi_table); | |
857 | ||
ad71860a AS |
858 | status = acpi_reallocate_root_table(); |
859 | if (ACPI_FAILURE(status)) { | |
860 | printk(KERN_ERR PREFIX | |
861 | "Unable to reallocate ACPI tables\n"); | |
862 | goto error0; | |
863 | } | |
864 | ||
1da177e4 LT |
865 | status = acpi_initialize_subsystem(); |
866 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
867 | printk(KERN_ERR PREFIX |
868 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
869 | goto error0; |
870 | } | |
871 | ||
872 | status = acpi_load_tables(); | |
873 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
874 | printk(KERN_ERR PREFIX |
875 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
876 | goto error0; |
877 | } | |
878 | ||
1da177e4 LT |
879 | #ifdef CONFIG_X86 |
880 | if (!acpi_ioapic) { | |
1da177e4 | 881 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
882 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
883 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
884 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
885 | } | |
1da177e4 | 886 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 887 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 888 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 889 | } else { |
1da177e4 | 890 | /* |
cee324b1 | 891 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
892 | * update it with result from INT_SRC_OVR parsing |
893 | */ | |
cee324b1 | 894 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
895 | } |
896 | #endif | |
897 | ||
4be44fcd LB |
898 | status = |
899 | acpi_enable_subsystem(~ | |
900 | (ACPI_NO_HARDWARE_INIT | | |
901 | ACPI_NO_ACPI_ENABLE)); | |
1da177e4 LT |
902 | if (ACPI_FAILURE(status)) { |
903 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
904 | goto error0; | |
905 | } | |
906 | ||
d550d98d | 907 | return; |
1da177e4 | 908 | |
4be44fcd | 909 | error0: |
1da177e4 | 910 | disable_acpi(); |
d550d98d | 911 | return; |
1da177e4 LT |
912 | } |
913 | ||
4be44fcd | 914 | static int __init acpi_bus_init(void) |
1da177e4 | 915 | { |
4be44fcd LB |
916 | int result = 0; |
917 | acpi_status status = AE_OK; | |
918 | extern acpi_status acpi_os_initialize1(void); | |
1da177e4 | 919 | |
176f9c18 | 920 | acpi_os_initialize1(); |
1da177e4 | 921 | |
4be44fcd LB |
922 | status = |
923 | acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); | |
1da177e4 | 924 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
925 | printk(KERN_ERR PREFIX |
926 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
927 | goto error1; |
928 | } | |
929 | ||
1da177e4 LT |
930 | /* |
931 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
932 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
933 | * is called). | |
934 | * | |
aafbcd16 | 935 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
936 | * the EC parameters out of that. |
937 | */ | |
938 | status = acpi_ec_ecdt_probe(); | |
939 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 940 | |
3563ff96 SL |
941 | acpi_bus_osc_support(); |
942 | ||
1da177e4 LT |
943 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
944 | if (ACPI_FAILURE(status)) { | |
945 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
946 | goto error1; | |
947 | } | |
948 | ||
b1d248d9 ZR |
949 | /* |
950 | * _PDC control method may load dynamic SSDT tables, | |
951 | * and we need to install the table handler before that. | |
952 | */ | |
953 | acpi_sysfs_init(); | |
954 | ||
78f16996 AC |
955 | acpi_early_processor_set_pdc(); |
956 | ||
455c8793 ZY |
957 | /* |
958 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
959 | * is necessary to enable it as early as possible. | |
960 | */ | |
961 | acpi_boot_ec_enable(); | |
962 | ||
1da177e4 LT |
963 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
964 | ||
aafbcd16 AS |
965 | /* Initialize sleep structures */ |
966 | acpi_sleep_init(); | |
967 | ||
1da177e4 LT |
968 | /* |
969 | * Get the system interrupt model and evaluate \_PIC. | |
970 | */ | |
971 | result = acpi_bus_init_irq(); | |
972 | if (result) | |
973 | goto error1; | |
974 | ||
975 | /* | |
976 | * Register the for all standard device notifications. | |
977 | */ | |
4be44fcd LB |
978 | status = |
979 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
980 | &acpi_bus_notify, NULL); | |
1da177e4 | 981 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
982 | printk(KERN_ERR PREFIX |
983 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
984 | goto error1; |
985 | } | |
986 | ||
987 | /* | |
988 | * Create the top ACPI proc directory | |
989 | */ | |
990 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
991 | ||
d550d98d | 992 | return 0; |
1da177e4 LT |
993 | |
994 | /* Mimic structured exception handling */ | |
4be44fcd | 995 | error1: |
1da177e4 | 996 | acpi_terminate(); |
d550d98d | 997 | return -ENODEV; |
1da177e4 LT |
998 | } |
999 | ||
99e0d2fc | 1000 | struct kobject *acpi_kobj; |
1da177e4 | 1001 | |
4be44fcd | 1002 | static int __init acpi_init(void) |
1da177e4 | 1003 | { |
4be44fcd | 1004 | int result = 0; |
1da177e4 | 1005 | |
1da177e4 | 1006 | |
1da177e4 LT |
1007 | if (acpi_disabled) { |
1008 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1009 | return -ENODEV; |
1da177e4 LT |
1010 | } |
1011 | ||
f62ed9e3 | 1012 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1013 | if (!acpi_kobj) { |
96b2dd1f | 1014 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1015 | acpi_kobj = NULL; |
1016 | } | |
1da177e4 | 1017 | |
0e46517d | 1018 | init_acpi_device_notify(); |
1da177e4 LT |
1019 | result = acpi_bus_init(); |
1020 | ||
1021 | if (!result) { | |
7752d5cf | 1022 | pci_mmcfg_late_init(); |
9f9adecd LB |
1023 | if (!(pm_flags & PM_APM)) |
1024 | pm_flags |= PM_ACPI; | |
1da177e4 | 1025 | else { |
4be44fcd LB |
1026 | printk(KERN_INFO PREFIX |
1027 | "APM is already active, exiting\n"); | |
1da177e4 LT |
1028 | disable_acpi(); |
1029 | result = -ENODEV; | |
1030 | } | |
1da177e4 LT |
1031 | } else |
1032 | disable_acpi(); | |
81d0273d BH |
1033 | |
1034 | if (acpi_disabled) | |
1035 | return result; | |
1036 | ||
6415e12b ZY |
1037 | /* |
1038 | * If the laptop falls into the DMI check table, the power state check | |
58f87ed0 | 1039 | * will be disabled in the course of device power transition. |
6415e12b ZY |
1040 | */ |
1041 | dmi_check_system(power_nocheck_dmi_table); | |
e747f274 BH |
1042 | |
1043 | acpi_scan_init(); | |
a5f820fe | 1044 | acpi_ec_init(); |
44515374 | 1045 | acpi_power_init(); |
a25ee920 | 1046 | acpi_debugfs_init(); |
9cee43e0 | 1047 | acpi_sleep_proc_init(); |
201b8c65 | 1048 | acpi_wakeup_device_init(); |
d550d98d | 1049 | return result; |
1da177e4 LT |
1050 | } |
1051 | ||
1052 | subsys_initcall(acpi_init); |