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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 | * | |
1da177e4 LT |
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/ioport.h> | |
d568df84 | 24 | #include <linux/kernel.h> |
1da177e4 LT |
25 | #include <linux/list.h> |
26 | #include <linux/sched.h> | |
27 | #include <linux/pm.h> | |
28 | #include <linux/device.h> | |
29 | #include <linux/proc_fs.h> | |
6697c052 | 30 | #include <linux/acpi.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
49a12877 | 32 | #include <linux/regulator/machine.h> |
1da177e4 LT |
33 | #ifdef CONFIG_X86 |
34 | #include <asm/mpspec.h> | |
35 | #endif | |
7752d5cf | 36 | #include <linux/pci.h> |
eccddd32 | 37 | #include <acpi/apei.h> |
eb27cae8 | 38 | #include <linux/dmi.h> |
cd51e61c | 39 | #include <linux/suspend.h> |
1da177e4 | 40 | |
e60cc7a6 BH |
41 | #include "internal.h" |
42 | ||
1da177e4 | 43 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 44 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 45 | |
4be44fcd LB |
46 | struct acpi_device *acpi_root; |
47 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
48 | EXPORT_SYMBOL(acpi_root_dir); |
49 | ||
cce4f632 | 50 | #ifdef CONFIG_X86 |
73577d1d LZ |
51 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
52 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
53 | { | |
54 | return 0; | |
55 | } | |
56 | #else | |
aa2110cb LM |
57 | static int set_copy_dsdt(const struct dmi_system_id *id) |
58 | { | |
59 | printk(KERN_NOTICE "%s detected - " | |
60 | "force copy of DSDT to local memory\n", id->ident); | |
61 | acpi_gbl_copy_dsdt_locally = 1; | |
62 | return 0; | |
63 | } | |
73577d1d | 64 | #endif |
aa2110cb LM |
65 | |
66 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
67 | /* | |
100cf877 | 68 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
69 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
70 | */ | |
71 | { | |
72 | .callback = set_copy_dsdt, | |
100cf877 | 73 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
74 | .matches = { |
75 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 76 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 77 | }, |
cce4f632 LM |
78 | }, |
79 | {} | |
aa2110cb | 80 | }; |
cce4f632 LM |
81 | #else |
82 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
83 | {} | |
84 | }; | |
85 | #endif | |
aa2110cb | 86 | |
1da177e4 LT |
87 | /* -------------------------------------------------------------------------- |
88 | Device Management | |
89 | -------------------------------------------------------------------------- */ | |
90 | ||
402ac536 BH |
91 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
92 | unsigned long long *sta) | |
1da177e4 | 93 | { |
402ac536 | 94 | acpi_status status; |
4be44fcd | 95 | |
402ac536 BH |
96 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
97 | if (ACPI_SUCCESS(status)) | |
98 | return AE_OK; | |
1da177e4 | 99 | |
402ac536 BH |
100 | if (status == AE_NOT_FOUND) { |
101 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
102 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
103 | return AE_OK; | |
1da177e4 | 104 | } |
402ac536 BH |
105 | return status; |
106 | } | |
1da177e4 | 107 | |
402ac536 BH |
108 | int acpi_bus_get_status(struct acpi_device *device) |
109 | { | |
110 | acpi_status status; | |
111 | unsigned long long sta; | |
112 | ||
113 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
114 | if (ACPI_FAILURE(status)) | |
115 | return -ENODEV; | |
116 | ||
25db115b | 117 | acpi_set_device_status(device, sta); |
1da177e4 LT |
118 | |
119 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
120 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
121 | "functional but not present;\n", | |
25db115b | 122 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
123 | } |
124 | ||
4be44fcd | 125 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 126 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 127 | return 0; |
1da177e4 | 128 | } |
4be44fcd | 129 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 130 | |
20733939 | 131 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 132 | void *context) |
20733939 ZR |
133 | { |
134 | return; | |
135 | } | |
136 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
137 | ||
72013795 LT |
138 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
139 | { | |
140 | acpi_status status; | |
141 | ||
142 | status = acpi_attach_data(handle, | |
143 | acpi_bus_private_data_handler, data); | |
144 | if (ACPI_FAILURE(status)) { | |
145 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
146 | return -ENODEV; | |
147 | } | |
148 | ||
149 | return 0; | |
150 | } | |
151 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
152 | ||
20733939 ZR |
153 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
154 | { | |
6a8c0af6 | 155 | acpi_status status; |
20733939 ZR |
156 | |
157 | if (!*data) | |
158 | return -EINVAL; | |
159 | ||
160 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
161 | if (ACPI_FAILURE(status)) { |
162 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
163 | return -ENODEV; |
164 | } | |
165 | ||
166 | return 0; | |
167 | } | |
72013795 LT |
168 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
169 | ||
170 | void acpi_bus_detach_private_data(acpi_handle handle) | |
171 | { | |
172 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
173 | } | |
174 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 175 | |
70023de8 SL |
176 | static void acpi_print_osc_error(acpi_handle handle, |
177 | struct acpi_osc_context *context, char *error) | |
178 | { | |
179 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
180 | int i; | |
181 | ||
182 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
183 | printk(KERN_DEBUG "%s\n", error); | |
184 | else { | |
185 | printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); | |
186 | kfree(buffer.pointer); | |
187 | } | |
188 | printk(KERN_DEBUG"_OSC request data:"); | |
189 | for (i = 0; i < context->cap.length; i += sizeof(u32)) | |
190 | printk("%x ", *((u32 *)(context->cap.pointer + i))); | |
191 | printk("\n"); | |
192 | } | |
193 | ||
4b3db708 | 194 | acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
70023de8 SL |
195 | { |
196 | int i; | |
197 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
198 | 24, 26, 28, 30, 32, 34}; | |
199 | ||
200 | if (strlen(str) != 36) | |
201 | return AE_BAD_PARAMETER; | |
202 | for (i = 0; i < 36; i++) { | |
203 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
204 | if (str[i] != '-') | |
205 | return AE_BAD_PARAMETER; | |
206 | } else if (!isxdigit(str[i])) | |
207 | return AE_BAD_PARAMETER; | |
208 | } | |
209 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
210 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
211 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
212 | } |
213 | return AE_OK; | |
214 | } | |
4b3db708 | 215 | EXPORT_SYMBOL_GPL(acpi_str_to_uuid); |
70023de8 SL |
216 | |
217 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
218 | { | |
219 | acpi_status status; | |
220 | struct acpi_object_list input; | |
221 | union acpi_object in_params[4]; | |
222 | union acpi_object *out_obj; | |
223 | u8 uuid[16]; | |
224 | u32 errors; | |
9dc130fc | 225 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
226 | |
227 | if (!context) | |
228 | return AE_ERROR; | |
229 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
230 | return AE_ERROR; | |
231 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
232 | context->ret.pointer = NULL; | |
233 | ||
234 | /* Setting up input parameters */ | |
235 | input.count = 4; | |
236 | input.pointer = in_params; | |
237 | in_params[0].type = ACPI_TYPE_BUFFER; | |
238 | in_params[0].buffer.length = 16; | |
239 | in_params[0].buffer.pointer = uuid; | |
240 | in_params[1].type = ACPI_TYPE_INTEGER; | |
241 | in_params[1].integer.value = context->rev; | |
242 | in_params[2].type = ACPI_TYPE_INTEGER; | |
243 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
244 | in_params[3].type = ACPI_TYPE_BUFFER; | |
245 | in_params[3].buffer.length = context->cap.length; | |
246 | in_params[3].buffer.pointer = context->cap.pointer; | |
247 | ||
9dc130fc | 248 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
249 | if (ACPI_FAILURE(status)) |
250 | return status; | |
251 | ||
9dc130fc | 252 | if (!output.length) |
70023de8 SL |
253 | return AE_NULL_OBJECT; |
254 | ||
9dc130fc SL |
255 | out_obj = output.pointer; |
256 | if (out_obj->type != ACPI_TYPE_BUFFER | |
257 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
258 | acpi_print_osc_error(handle, context, |
259 | "_OSC evaluation returned wrong type"); | |
260 | status = AE_TYPE; | |
261 | goto out_kfree; | |
262 | } | |
263 | /* Need to ignore the bit0 in result code */ | |
264 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
265 | if (errors) { | |
266 | if (errors & OSC_REQUEST_ERROR) | |
267 | acpi_print_osc_error(handle, context, | |
268 | "_OSC request failed"); | |
269 | if (errors & OSC_INVALID_UUID_ERROR) | |
270 | acpi_print_osc_error(handle, context, | |
271 | "_OSC invalid UUID"); | |
272 | if (errors & OSC_INVALID_REVISION_ERROR) | |
273 | acpi_print_osc_error(handle, context, | |
274 | "_OSC invalid revision"); | |
275 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 276 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
277 | & OSC_QUERY_ENABLE) |
278 | goto out_success; | |
279 | status = AE_SUPPORT; | |
280 | goto out_kfree; | |
281 | } | |
282 | status = AE_ERROR; | |
283 | goto out_kfree; | |
284 | } | |
285 | out_success: | |
9dc130fc | 286 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
287 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
288 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
289 | if (!context->ret.pointer) { |
290 | status = AE_NO_MEMORY; | |
291 | goto out_kfree; | |
292 | } | |
9dc130fc | 293 | status = AE_OK; |
70023de8 SL |
294 | |
295 | out_kfree: | |
9dc130fc SL |
296 | kfree(output.pointer); |
297 | if (status != AE_OK) | |
298 | context->ret.pointer = NULL; | |
70023de8 SL |
299 | return status; |
300 | } | |
301 | EXPORT_SYMBOL(acpi_run_osc); | |
302 | ||
eccddd32 | 303 | bool osc_sb_apei_support_acked; |
3563ff96 SL |
304 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
305 | static void acpi_bus_osc_support(void) | |
306 | { | |
307 | u32 capbuf[2]; | |
308 | struct acpi_osc_context context = { | |
309 | .uuid_str = sb_uuid_str, | |
310 | .rev = 1, | |
311 | .cap.length = 8, | |
312 | .cap.pointer = capbuf, | |
313 | }; | |
314 | acpi_handle handle; | |
315 | ||
b938a229 BH |
316 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
317 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
318 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
319 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
320 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
321 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 322 | |
b938a229 | 323 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
c2f4191a | 324 | |
eccddd32 | 325 | if (!ghes_disable) |
b938a229 | 326 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
327 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
328 | return; | |
eccddd32 HY |
329 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
330 | u32 *capbuf_ret = context.ret.pointer; | |
b938a229 | 331 | if (context.ret.length > OSC_SUPPORT_DWORD) |
eccddd32 | 332 | osc_sb_apei_support_acked = |
b938a229 | 333 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
3563ff96 | 334 | kfree(context.ret.pointer); |
eccddd32 HY |
335 | } |
336 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
337 | } |
338 | ||
1da177e4 LT |
339 | /* -------------------------------------------------------------------------- |
340 | Notification Handling | |
341 | -------------------------------------------------------------------------- */ | |
342 | ||
1da177e4 LT |
343 | /** |
344 | * acpi_bus_notify | |
345 | * --------------- | |
346 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
347 | */ | |
4be44fcd | 348 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 349 | { |
1a699476 | 350 | struct acpi_device *adev; |
6d278131 | 351 | struct acpi_driver *driver; |
1a699476 | 352 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 353 | bool hotplug_event = false; |
02c37bd8 | 354 | |
1da177e4 | 355 | switch (type) { |
1da177e4 | 356 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 357 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 358 | hotplug_event = true; |
1da177e4 LT |
359 | break; |
360 | ||
361 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 362 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 363 | hotplug_event = true; |
1da177e4 LT |
364 | break; |
365 | ||
366 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 367 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
368 | break; |
369 | ||
370 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 371 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 372 | hotplug_event = true; |
1da177e4 LT |
373 | break; |
374 | ||
375 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 376 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
377 | /* TBD: Exactly what does 'light' mean? */ |
378 | break; | |
379 | ||
380 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
381 | acpi_handle_err(handle, "Device cannot be configured due " |
382 | "to a frequency mismatch\n"); | |
1da177e4 LT |
383 | break; |
384 | ||
385 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
386 | acpi_handle_err(handle, "Device cannot be configured due " |
387 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
388 | break; |
389 | ||
390 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 391 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
392 | break; |
393 | ||
394 | default: | |
f66abe92 RW |
395 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
396 | break; | |
1da177e4 LT |
397 | } |
398 | ||
1a699476 RW |
399 | adev = acpi_bus_get_acpi_device(handle); |
400 | if (!adev) | |
401 | goto err; | |
78ea4639 | 402 | |
1a699476 RW |
403 | driver = adev->driver; |
404 | if (driver && driver->ops.notify && | |
405 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
406 | driver->ops.notify(adev, type); | |
407 | ||
d0103387 RW |
408 | if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
409 | return; | |
410 | ||
1a699476 RW |
411 | acpi_bus_put_acpi_device(adev); |
412 | return; | |
413 | ||
414 | err: | |
700b8422 | 415 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
416 | } |
417 | ||
5894b0c4 RW |
418 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
419 | { | |
420 | struct acpi_device *device = data; | |
421 | ||
422 | device->driver->ops.notify(device, event); | |
423 | } | |
424 | ||
425 | static void acpi_device_notify_fixed(void *data) | |
426 | { | |
427 | struct acpi_device *device = data; | |
428 | ||
429 | /* Fixed hardware devices have no handles */ | |
430 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
431 | } | |
432 | ||
433 | static u32 acpi_device_fixed_event(void *data) | |
434 | { | |
435 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
436 | return ACPI_INTERRUPT_HANDLED; | |
437 | } | |
438 | ||
439 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
440 | { | |
441 | acpi_status status; | |
442 | ||
443 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
444 | status = | |
445 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
446 | acpi_device_fixed_event, | |
447 | device); | |
448 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
449 | status = | |
450 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
451 | acpi_device_fixed_event, | |
452 | device); | |
453 | else | |
454 | status = acpi_install_notify_handler(device->handle, | |
455 | ACPI_DEVICE_NOTIFY, | |
456 | acpi_device_notify, | |
457 | device); | |
458 | ||
459 | if (ACPI_FAILURE(status)) | |
460 | return -EINVAL; | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
465 | { | |
466 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
467 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
468 | acpi_device_fixed_event); | |
469 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
470 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
471 | acpi_device_fixed_event); | |
472 | else | |
473 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
474 | acpi_device_notify); | |
475 | } | |
476 | ||
68c6b148 RW |
477 | /* -------------------------------------------------------------------------- |
478 | Device Matching | |
479 | -------------------------------------------------------------------------- */ | |
480 | ||
e91a398c RW |
481 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, |
482 | const struct device *dev) | |
483 | { | |
484 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
485 | ||
486 | mutex_lock(physical_node_lock); | |
487 | if (list_empty(&adev->physical_node_list)) { | |
488 | adev = NULL; | |
489 | } else { | |
490 | const struct acpi_device_physical_node *node; | |
491 | ||
492 | node = list_first_entry(&adev->physical_node_list, | |
493 | struct acpi_device_physical_node, node); | |
494 | if (node->dev != dev) | |
495 | adev = NULL; | |
496 | } | |
497 | mutex_unlock(physical_node_lock); | |
498 | return adev; | |
499 | } | |
500 | ||
3431e490 RW |
501 | /** |
502 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
503 | * @adev: ACPI companion device | |
504 | * @dev: Physical device to check | |
505 | * | |
506 | * Function checks if given @dev is the first physical devices attached to | |
507 | * the ACPI companion device. This distinction is needed in some cases | |
508 | * where the same companion device is shared between many physical devices. | |
509 | * | |
510 | * Note that the caller have to provide valid @adev pointer. | |
511 | */ | |
512 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
513 | const struct device *dev) | |
514 | { | |
e91a398c | 515 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
516 | } |
517 | ||
68c6b148 RW |
518 | /* |
519 | * acpi_companion_match() - Can we match via ACPI companion device | |
520 | * @dev: Device in question | |
521 | * | |
522 | * Check if the given device has an ACPI companion and if that companion has | |
523 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
524 | * device associated with it. Return the companion pointer if that's the case | |
525 | * or NULL otherwise. | |
526 | * | |
527 | * If multiple physical devices are attached to a single ACPI companion, we need | |
528 | * to be careful. The usage scenario for this kind of relationship is that all | |
529 | * of the physical devices in question use resources provided by the ACPI | |
530 | * companion. A typical case is an MFD device where all the sub-devices share | |
531 | * the parent's ACPI companion. In such cases we can only allow the primary | |
532 | * (first) physical device to be matched with the help of the companion's PNP | |
533 | * IDs. | |
534 | * | |
535 | * Additional physical devices sharing the ACPI companion can still use | |
536 | * resources available from it but they will be matched normally using functions | |
537 | * provided by their bus types (and analogously for their modalias). | |
538 | */ | |
539 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
540 | { | |
541 | struct acpi_device *adev; | |
68c6b148 RW |
542 | |
543 | adev = ACPI_COMPANION(dev); | |
544 | if (!adev) | |
545 | return NULL; | |
546 | ||
547 | if (list_empty(&adev->pnp.ids)) | |
548 | return NULL; | |
549 | ||
e91a398c | 550 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
551 | } |
552 | ||
553 | /** | |
554 | * acpi_of_match_device - Match device object using the "compatible" property. | |
555 | * @adev: ACPI device object to match. | |
556 | * @of_match_table: List of device IDs to match against. | |
557 | * | |
558 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
559 | * identifiers and a _DSD object with the "compatible" property, use that | |
560 | * property to match against the given list of identifiers. | |
561 | */ | |
562 | static bool acpi_of_match_device(struct acpi_device *adev, | |
563 | const struct of_device_id *of_match_table) | |
564 | { | |
565 | const union acpi_object *of_compatible, *obj; | |
566 | int i, nval; | |
567 | ||
568 | if (!adev) | |
569 | return false; | |
570 | ||
571 | of_compatible = adev->data.of_compatible; | |
572 | if (!of_match_table || !of_compatible) | |
573 | return false; | |
574 | ||
575 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
576 | nval = of_compatible->package.count; | |
577 | obj = of_compatible->package.elements; | |
578 | } else { /* Must be ACPI_TYPE_STRING. */ | |
579 | nval = 1; | |
580 | obj = of_compatible; | |
581 | } | |
582 | /* Now we can look for the driver DT compatible strings */ | |
583 | for (i = 0; i < nval; i++, obj++) { | |
584 | const struct of_device_id *id; | |
585 | ||
586 | for (id = of_match_table; id->compatible[0]; id++) | |
587 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
588 | return true; | |
589 | } | |
590 | ||
591 | return false; | |
592 | } | |
593 | ||
594 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, | |
595 | struct acpi_hardware_id *hwid) | |
596 | { | |
597 | int i, msk, byte_shift; | |
598 | char buf[3]; | |
599 | ||
600 | if (!id->cls) | |
601 | return false; | |
602 | ||
603 | /* Apply class-code bitmask, before checking each class-code byte */ | |
604 | for (i = 1; i <= 3; i++) { | |
605 | byte_shift = 8 * (3 - i); | |
606 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
607 | if (!msk) | |
608 | continue; | |
609 | ||
610 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
611 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
612 | return false; | |
613 | } | |
614 | return true; | |
615 | } | |
616 | ||
617 | static const struct acpi_device_id *__acpi_match_device( | |
618 | struct acpi_device *device, | |
619 | const struct acpi_device_id *ids, | |
620 | const struct of_device_id *of_ids) | |
621 | { | |
622 | const struct acpi_device_id *id; | |
623 | struct acpi_hardware_id *hwid; | |
624 | ||
625 | /* | |
626 | * If the device is not present, it is unnecessary to load device | |
627 | * driver for it. | |
628 | */ | |
629 | if (!device || !device->status.present) | |
630 | return NULL; | |
631 | ||
632 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
633 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
634 | for (id = ids; id->id[0] || id->cls; id++) { | |
635 | if (id->id[0] && !strcmp((char *) id->id, hwid->id)) | |
636 | return id; | |
637 | else if (id->cls && __acpi_match_device_cls(id, hwid)) | |
638 | return id; | |
639 | } | |
640 | ||
641 | /* | |
642 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
643 | * "compatible" property if found. | |
644 | * | |
645 | * The id returned by the below is not valid, but the only | |
646 | * caller passing non-NULL of_ids here is only interested in | |
647 | * whether or not the return value is NULL. | |
648 | */ | |
649 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) | |
650 | && acpi_of_match_device(device, of_ids)) | |
651 | return id; | |
652 | } | |
653 | return NULL; | |
654 | } | |
655 | ||
656 | /** | |
657 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
658 | * @ids: Array of struct acpi_device_id object to match against. | |
659 | * @dev: The device structure to match. | |
660 | * | |
661 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
662 | * object for that handle and use that object to match against a given list of | |
663 | * device IDs. | |
664 | * | |
665 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
666 | */ | |
667 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
668 | const struct device *dev) | |
669 | { | |
670 | return __acpi_match_device(acpi_companion_match(dev), ids, NULL); | |
671 | } | |
672 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
673 | ||
674 | int acpi_match_device_ids(struct acpi_device *device, | |
675 | const struct acpi_device_id *ids) | |
676 | { | |
677 | return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; | |
678 | } | |
679 | EXPORT_SYMBOL(acpi_match_device_ids); | |
680 | ||
681 | bool acpi_driver_match_device(struct device *dev, | |
682 | const struct device_driver *drv) | |
683 | { | |
684 | if (!drv->acpi_match_table) | |
685 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
686 | drv->of_match_table); | |
687 | ||
688 | return !!__acpi_match_device(acpi_companion_match(dev), | |
689 | drv->acpi_match_table, drv->of_match_table); | |
690 | } | |
691 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
692 | ||
5894b0c4 RW |
693 | /* -------------------------------------------------------------------------- |
694 | ACPI Driver Management | |
695 | -------------------------------------------------------------------------- */ | |
696 | ||
697 | /** | |
698 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
699 | * @driver: driver being registered | |
700 | * | |
701 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
702 | * devices that match the driver's criteria and binds. Returns zero for | |
703 | * success or a negative error status for failure. | |
704 | */ | |
705 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
706 | { | |
707 | int ret; | |
708 | ||
709 | if (acpi_disabled) | |
710 | return -ENODEV; | |
711 | driver->drv.name = driver->name; | |
712 | driver->drv.bus = &acpi_bus_type; | |
713 | driver->drv.owner = driver->owner; | |
714 | ||
715 | ret = driver_register(&driver->drv); | |
716 | return ret; | |
717 | } | |
718 | ||
719 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
720 | ||
721 | /** | |
722 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
723 | * @driver: driver to unregister | |
724 | * | |
725 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
726 | * devices that match the driver's criteria and unbinds. | |
727 | */ | |
728 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
729 | { | |
730 | driver_unregister(&driver->drv); | |
731 | } | |
732 | ||
733 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
734 | ||
735 | /* -------------------------------------------------------------------------- | |
736 | ACPI Bus operations | |
737 | -------------------------------------------------------------------------- */ | |
738 | ||
739 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
740 | { | |
741 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
742 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
743 | ||
744 | return acpi_dev->flags.match_driver | |
745 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
746 | } | |
747 | ||
748 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
749 | { | |
750 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
751 | } | |
752 | ||
753 | static int acpi_device_probe(struct device *dev) | |
754 | { | |
755 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
756 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
757 | int ret; | |
758 | ||
759 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
760 | return -EINVAL; | |
761 | ||
762 | if (!acpi_drv->ops.add) | |
763 | return -ENOSYS; | |
764 | ||
765 | ret = acpi_drv->ops.add(acpi_dev); | |
766 | if (ret) | |
767 | return ret; | |
768 | ||
769 | acpi_dev->driver = acpi_drv; | |
770 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
771 | "Driver [%s] successfully bound to device [%s]\n", | |
772 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
773 | ||
774 | if (acpi_drv->ops.notify) { | |
775 | ret = acpi_device_install_notify_handler(acpi_dev); | |
776 | if (ret) { | |
777 | if (acpi_drv->ops.remove) | |
778 | acpi_drv->ops.remove(acpi_dev); | |
779 | ||
780 | acpi_dev->driver = NULL; | |
781 | acpi_dev->driver_data = NULL; | |
782 | return ret; | |
783 | } | |
784 | } | |
785 | ||
786 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
787 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
788 | get_device(dev); | |
789 | return 0; | |
790 | } | |
791 | ||
792 | static int acpi_device_remove(struct device * dev) | |
793 | { | |
794 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
795 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
796 | ||
797 | if (acpi_drv) { | |
798 | if (acpi_drv->ops.notify) | |
799 | acpi_device_remove_notify_handler(acpi_dev); | |
800 | if (acpi_drv->ops.remove) | |
801 | acpi_drv->ops.remove(acpi_dev); | |
802 | } | |
803 | acpi_dev->driver = NULL; | |
804 | acpi_dev->driver_data = NULL; | |
805 | ||
806 | put_device(dev); | |
807 | return 0; | |
808 | } | |
809 | ||
810 | struct bus_type acpi_bus_type = { | |
811 | .name = "acpi", | |
812 | .match = acpi_bus_match, | |
813 | .probe = acpi_device_probe, | |
814 | .remove = acpi_device_remove, | |
815 | .uevent = acpi_device_uevent, | |
816 | }; | |
817 | ||
1da177e4 LT |
818 | /* -------------------------------------------------------------------------- |
819 | Initialization/Cleanup | |
820 | -------------------------------------------------------------------------- */ | |
821 | ||
4be44fcd | 822 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 823 | { |
6a8c0af6 | 824 | acpi_status status; |
4be44fcd | 825 | char *message = NULL; |
1da177e4 | 826 | |
1da177e4 | 827 | |
aafbcd16 | 828 | /* |
1da177e4 LT |
829 | * Let the system know what interrupt model we are using by |
830 | * evaluating the \_PIC object, if exists. | |
831 | */ | |
832 | ||
833 | switch (acpi_irq_model) { | |
834 | case ACPI_IRQ_MODEL_PIC: | |
835 | message = "PIC"; | |
836 | break; | |
837 | case ACPI_IRQ_MODEL_IOAPIC: | |
838 | message = "IOAPIC"; | |
839 | break; | |
840 | case ACPI_IRQ_MODEL_IOSAPIC: | |
841 | message = "IOSAPIC"; | |
842 | break; | |
fbe61ec7 HG |
843 | case ACPI_IRQ_MODEL_GIC: |
844 | message = "GIC"; | |
845 | break; | |
3948ec94 JK |
846 | case ACPI_IRQ_MODEL_PLATFORM: |
847 | message = "platform specific model"; | |
848 | break; | |
1da177e4 LT |
849 | default: |
850 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 851 | return -ENODEV; |
1da177e4 LT |
852 | } |
853 | ||
854 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
855 | ||
0db98202 | 856 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 857 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 858 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 859 | return -ENODEV; |
1da177e4 LT |
860 | } |
861 | ||
d550d98d | 862 | return 0; |
1da177e4 LT |
863 | } |
864 | ||
b064a8fa RW |
865 | /** |
866 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
867 | * | |
868 | * The ACPI tables are accessible after this, but the handling of events has not | |
869 | * been initialized and the global lock is not available yet, so AML should not | |
870 | * be executed at this point. | |
871 | * | |
872 | * Doing this before switching the EFI runtime services to virtual mode allows | |
873 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
874 | */ | |
4be44fcd | 875 | void __init acpi_early_init(void) |
1da177e4 | 876 | { |
6a8c0af6 | 877 | acpi_status status; |
1da177e4 LT |
878 | |
879 | if (acpi_disabled) | |
d550d98d | 880 | return; |
1da177e4 | 881 | |
61686124 BM |
882 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
883 | ||
4fc0a7e8 LZ |
884 | /* It's safe to verify table checksums during late stage */ |
885 | acpi_gbl_verify_table_checksum = TRUE; | |
886 | ||
1da177e4 LT |
887 | /* enable workarounds, unless strict ACPI spec. compliance */ |
888 | if (!acpi_strict) | |
889 | acpi_gbl_enable_interpreter_slack = TRUE; | |
890 | ||
ad71860a AS |
891 | acpi_gbl_permanent_mmap = 1; |
892 | ||
aa2110cb LM |
893 | /* |
894 | * If the machine falls into the DMI check table, | |
895 | * DSDT will be copied to memory | |
896 | */ | |
897 | dmi_check_system(dsdt_dmi_table); | |
898 | ||
ad71860a AS |
899 | status = acpi_reallocate_root_table(); |
900 | if (ACPI_FAILURE(status)) { | |
901 | printk(KERN_ERR PREFIX | |
902 | "Unable to reallocate ACPI tables\n"); | |
903 | goto error0; | |
904 | } | |
905 | ||
1da177e4 LT |
906 | status = acpi_initialize_subsystem(); |
907 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
908 | printk(KERN_ERR PREFIX |
909 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
910 | goto error0; |
911 | } | |
912 | ||
913 | status = acpi_load_tables(); | |
914 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
915 | printk(KERN_ERR PREFIX |
916 | "Unable to load the System Description Tables\n"); | |
1da177e4 LT |
917 | goto error0; |
918 | } | |
919 | ||
1da177e4 LT |
920 | #ifdef CONFIG_X86 |
921 | if (!acpi_ioapic) { | |
1da177e4 | 922 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
923 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
924 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
925 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
926 | } | |
1da177e4 | 927 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 928 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 929 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 930 | } else { |
1da177e4 | 931 | /* |
cee324b1 | 932 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
933 | * update it with result from INT_SRC_OVR parsing |
934 | */ | |
cee324b1 | 935 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
936 | } |
937 | #endif | |
b064a8fa RW |
938 | return; |
939 | ||
940 | error0: | |
941 | disable_acpi(); | |
942 | } | |
943 | ||
944 | /** | |
945 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
946 | * | |
947 | * Switch over the platform to the ACPI mode (if possible), initialize the | |
948 | * handling of ACPI events, install the interrupt and global lock handlers. | |
949 | * | |
950 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
951 | * done before all things that really depend on ACPI. The right spot appears to | |
952 | * be before finalizing the EFI initialization. | |
953 | */ | |
954 | void __init acpi_subsystem_init(void) | |
955 | { | |
956 | acpi_status status; | |
957 | ||
958 | if (acpi_disabled) | |
959 | return; | |
1da177e4 | 960 | |
4505a201 | 961 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
962 | if (ACPI_FAILURE(status)) { |
963 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
964 | disable_acpi(); |
965 | } else { | |
966 | /* | |
967 | * If the system is using ACPI then we can be reasonably | |
968 | * confident that any regulators are managed by the firmware | |
969 | * so tell the regulator core it has everything it needs to | |
970 | * know. | |
971 | */ | |
972 | regulator_has_full_constraints(); | |
1da177e4 | 973 | } |
1da177e4 LT |
974 | } |
975 | ||
4be44fcd | 976 | static int __init acpi_bus_init(void) |
1da177e4 | 977 | { |
6a8c0af6 BH |
978 | int result; |
979 | acpi_status status; | |
1da177e4 | 980 | |
176f9c18 | 981 | acpi_os_initialize1(); |
1da177e4 | 982 | |
4505a201 | 983 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1da177e4 | 984 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
985 | printk(KERN_ERR PREFIX |
986 | "Unable to start the ACPI Interpreter\n"); | |
1da177e4 LT |
987 | goto error1; |
988 | } | |
989 | ||
1da177e4 LT |
990 | /* |
991 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
992 | * the EC device is found in the namespace (i.e. before acpi_initialize_objects() | |
993 | * is called). | |
994 | * | |
aafbcd16 | 995 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
996 | * the EC parameters out of that. |
997 | */ | |
998 | status = acpi_ec_ecdt_probe(); | |
999 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 LT |
1000 | |
1001 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); | |
1002 | if (ACPI_FAILURE(status)) { | |
1003 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1004 | goto error1; | |
1005 | } | |
1006 | ||
fc54ab72 LM |
1007 | /* |
1008 | * _OSC method may exist in module level code, | |
1009 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1010 | */ | |
1011 | acpi_bus_osc_support(); | |
1012 | ||
b1d248d9 ZR |
1013 | /* |
1014 | * _PDC control method may load dynamic SSDT tables, | |
1015 | * and we need to install the table handler before that. | |
1016 | */ | |
1017 | acpi_sysfs_init(); | |
1018 | ||
78f16996 AC |
1019 | acpi_early_processor_set_pdc(); |
1020 | ||
455c8793 ZY |
1021 | /* |
1022 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1023 | * is necessary to enable it as early as possible. | |
1024 | */ | |
1025 | acpi_boot_ec_enable(); | |
1026 | ||
1da177e4 LT |
1027 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1028 | ||
aafbcd16 AS |
1029 | /* Initialize sleep structures */ |
1030 | acpi_sleep_init(); | |
1031 | ||
1da177e4 LT |
1032 | /* |
1033 | * Get the system interrupt model and evaluate \_PIC. | |
1034 | */ | |
1035 | result = acpi_bus_init_irq(); | |
1036 | if (result) | |
1037 | goto error1; | |
1038 | ||
1039 | /* | |
1040 | * Register the for all standard device notifications. | |
1041 | */ | |
4be44fcd LB |
1042 | status = |
1043 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1044 | &acpi_bus_notify, NULL); | |
1da177e4 | 1045 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1046 | printk(KERN_ERR PREFIX |
1047 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1048 | goto error1; |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * Create the top ACPI proc directory | |
1053 | */ | |
1054 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1055 | ||
1dcc3d33 RW |
1056 | result = bus_register(&acpi_bus_type); |
1057 | if (!result) | |
1058 | return 0; | |
1da177e4 LT |
1059 | |
1060 | /* Mimic structured exception handling */ | |
4be44fcd | 1061 | error1: |
1da177e4 | 1062 | acpi_terminate(); |
d550d98d | 1063 | return -ENODEV; |
1da177e4 LT |
1064 | } |
1065 | ||
99e0d2fc | 1066 | struct kobject *acpi_kobj; |
f2d4753f | 1067 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1068 | |
4be44fcd | 1069 | static int __init acpi_init(void) |
1da177e4 | 1070 | { |
6831c6ed | 1071 | int result; |
1da177e4 | 1072 | |
1da177e4 LT |
1073 | if (acpi_disabled) { |
1074 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1075 | return -ENODEV; |
1da177e4 LT |
1076 | } |
1077 | ||
f62ed9e3 | 1078 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1079 | if (!acpi_kobj) { |
96b2dd1f | 1080 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1081 | acpi_kobj = NULL; |
1082 | } | |
1da177e4 | 1083 | |
0e46517d | 1084 | init_acpi_device_notify(); |
1da177e4 | 1085 | result = acpi_bus_init(); |
6831c6ed | 1086 | if (result) { |
1da177e4 | 1087 | disable_acpi(); |
81d0273d | 1088 | return result; |
6831c6ed | 1089 | } |
81d0273d | 1090 | |
6831c6ed | 1091 | pci_mmcfg_late_init(); |
e747f274 | 1092 | acpi_scan_init(); |
a5f820fe | 1093 | acpi_ec_init(); |
a25ee920 | 1094 | acpi_debugfs_init(); |
9cee43e0 | 1095 | acpi_sleep_proc_init(); |
201b8c65 | 1096 | acpi_wakeup_device_init(); |
6831c6ed | 1097 | return 0; |
1da177e4 LT |
1098 | } |
1099 | ||
1100 | subsys_initcall(acpi_init); |