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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> |
baa0c019 PP |
33 | #include <linux/workqueue.h> |
34 | #include <linux/reboot.h> | |
35 | #include <linux/delay.h> | |
1da177e4 LT |
36 | #ifdef CONFIG_X86 |
37 | #include <asm/mpspec.h> | |
38 | #endif | |
7752d5cf | 39 | #include <linux/pci.h> |
eccddd32 | 40 | #include <acpi/apei.h> |
eb27cae8 | 41 | #include <linux/dmi.h> |
cd51e61c | 42 | #include <linux/suspend.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 | ||
cce4f632 | 53 | #ifdef CONFIG_X86 |
73577d1d LZ |
54 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
55 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
56 | { | |
57 | return 0; | |
58 | } | |
59 | #else | |
aa2110cb LM |
60 | static int set_copy_dsdt(const struct dmi_system_id *id) |
61 | { | |
62 | printk(KERN_NOTICE "%s detected - " | |
63 | "force copy of DSDT to local memory\n", id->ident); | |
64 | acpi_gbl_copy_dsdt_locally = 1; | |
65 | return 0; | |
66 | } | |
73577d1d | 67 | #endif |
aa2110cb LM |
68 | |
69 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
70 | /* | |
100cf877 | 71 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
72 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
73 | */ | |
74 | { | |
75 | .callback = set_copy_dsdt, | |
100cf877 | 76 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
77 | .matches = { |
78 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 79 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 80 | }, |
cce4f632 LM |
81 | }, |
82 | {} | |
aa2110cb | 83 | }; |
cce4f632 LM |
84 | #else |
85 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
86 | {} | |
87 | }; | |
88 | #endif | |
aa2110cb | 89 | |
1da177e4 LT |
90 | /* -------------------------------------------------------------------------- |
91 | Device Management | |
92 | -------------------------------------------------------------------------- */ | |
93 | ||
402ac536 BH |
94 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
95 | unsigned long long *sta) | |
1da177e4 | 96 | { |
402ac536 | 97 | acpi_status status; |
4be44fcd | 98 | |
402ac536 BH |
99 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
100 | if (ACPI_SUCCESS(status)) | |
101 | return AE_OK; | |
1da177e4 | 102 | |
402ac536 BH |
103 | if (status == AE_NOT_FOUND) { |
104 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
105 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
106 | return AE_OK; | |
1da177e4 | 107 | } |
402ac536 BH |
108 | return status; |
109 | } | |
1da177e4 | 110 | |
402ac536 BH |
111 | int acpi_bus_get_status(struct acpi_device *device) |
112 | { | |
113 | acpi_status status; | |
114 | unsigned long long sta; | |
115 | ||
116 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
117 | if (ACPI_FAILURE(status)) | |
118 | return -ENODEV; | |
119 | ||
25db115b | 120 | acpi_set_device_status(device, sta); |
1da177e4 LT |
121 | |
122 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
123 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
124 | "functional but not present;\n", | |
25db115b | 125 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
126 | } |
127 | ||
4be44fcd | 128 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 129 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 130 | return 0; |
1da177e4 | 131 | } |
4be44fcd | 132 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 133 | |
20733939 | 134 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 135 | void *context) |
20733939 ZR |
136 | { |
137 | return; | |
138 | } | |
139 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
140 | ||
72013795 LT |
141 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
142 | { | |
143 | acpi_status status; | |
144 | ||
145 | status = acpi_attach_data(handle, | |
146 | acpi_bus_private_data_handler, data); | |
147 | if (ACPI_FAILURE(status)) { | |
148 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
149 | return -ENODEV; | |
150 | } | |
151 | ||
152 | return 0; | |
153 | } | |
154 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
155 | ||
20733939 ZR |
156 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
157 | { | |
6a8c0af6 | 158 | acpi_status status; |
20733939 ZR |
159 | |
160 | if (!*data) | |
161 | return -EINVAL; | |
162 | ||
163 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
164 | if (ACPI_FAILURE(status)) { |
165 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
166 | return -ENODEV; |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
72013795 LT |
171 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
172 | ||
173 | void acpi_bus_detach_private_data(acpi_handle handle) | |
174 | { | |
175 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
176 | } | |
177 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 178 | |
70023de8 | 179 | static void acpi_print_osc_error(acpi_handle handle, |
f26f5c8b | 180 | struct acpi_osc_context *context, char *error) |
70023de8 | 181 | { |
70023de8 SL |
182 | int i; |
183 | ||
f26f5c8b RW |
184 | acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); |
185 | ||
186 | pr_debug("_OSC request data:"); | |
70023de8 | 187 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
f26f5c8b RW |
188 | pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); |
189 | ||
190 | pr_debug("\n"); | |
70023de8 SL |
191 | } |
192 | ||
4b3db708 | 193 | acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
70023de8 SL |
194 | { |
195 | int i; | |
196 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
197 | 24, 26, 28, 30, 32, 34}; | |
198 | ||
199 | if (strlen(str) != 36) | |
200 | return AE_BAD_PARAMETER; | |
201 | for (i = 0; i < 36; i++) { | |
202 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
203 | if (str[i] != '-') | |
204 | return AE_BAD_PARAMETER; | |
205 | } else if (!isxdigit(str[i])) | |
206 | return AE_BAD_PARAMETER; | |
207 | } | |
208 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
209 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
210 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
211 | } |
212 | return AE_OK; | |
213 | } | |
4b3db708 | 214 | EXPORT_SYMBOL_GPL(acpi_str_to_uuid); |
70023de8 SL |
215 | |
216 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
217 | { | |
218 | acpi_status status; | |
219 | struct acpi_object_list input; | |
220 | union acpi_object in_params[4]; | |
221 | union acpi_object *out_obj; | |
222 | u8 uuid[16]; | |
223 | u32 errors; | |
9dc130fc | 224 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
225 | |
226 | if (!context) | |
227 | return AE_ERROR; | |
228 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
229 | return AE_ERROR; | |
230 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
231 | context->ret.pointer = NULL; | |
232 | ||
233 | /* Setting up input parameters */ | |
234 | input.count = 4; | |
235 | input.pointer = in_params; | |
236 | in_params[0].type = ACPI_TYPE_BUFFER; | |
237 | in_params[0].buffer.length = 16; | |
238 | in_params[0].buffer.pointer = uuid; | |
239 | in_params[1].type = ACPI_TYPE_INTEGER; | |
240 | in_params[1].integer.value = context->rev; | |
241 | in_params[2].type = ACPI_TYPE_INTEGER; | |
242 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
243 | in_params[3].type = ACPI_TYPE_BUFFER; | |
244 | in_params[3].buffer.length = context->cap.length; | |
245 | in_params[3].buffer.pointer = context->cap.pointer; | |
246 | ||
9dc130fc | 247 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
248 | if (ACPI_FAILURE(status)) |
249 | return status; | |
250 | ||
9dc130fc | 251 | if (!output.length) |
70023de8 SL |
252 | return AE_NULL_OBJECT; |
253 | ||
9dc130fc SL |
254 | out_obj = output.pointer; |
255 | if (out_obj->type != ACPI_TYPE_BUFFER | |
256 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
257 | acpi_print_osc_error(handle, context, |
258 | "_OSC evaluation returned wrong type"); | |
259 | status = AE_TYPE; | |
260 | goto out_kfree; | |
261 | } | |
262 | /* Need to ignore the bit0 in result code */ | |
263 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
264 | if (errors) { | |
265 | if (errors & OSC_REQUEST_ERROR) | |
266 | acpi_print_osc_error(handle, context, | |
267 | "_OSC request failed"); | |
268 | if (errors & OSC_INVALID_UUID_ERROR) | |
269 | acpi_print_osc_error(handle, context, | |
270 | "_OSC invalid UUID"); | |
271 | if (errors & OSC_INVALID_REVISION_ERROR) | |
272 | acpi_print_osc_error(handle, context, | |
273 | "_OSC invalid revision"); | |
274 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 275 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
276 | & OSC_QUERY_ENABLE) |
277 | goto out_success; | |
278 | status = AE_SUPPORT; | |
279 | goto out_kfree; | |
280 | } | |
281 | status = AE_ERROR; | |
282 | goto out_kfree; | |
283 | } | |
284 | out_success: | |
9dc130fc | 285 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
286 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
287 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
288 | if (!context->ret.pointer) { |
289 | status = AE_NO_MEMORY; | |
290 | goto out_kfree; | |
291 | } | |
9dc130fc | 292 | status = AE_OK; |
70023de8 SL |
293 | |
294 | out_kfree: | |
9dc130fc SL |
295 | kfree(output.pointer); |
296 | if (status != AE_OK) | |
297 | context->ret.pointer = NULL; | |
70023de8 SL |
298 | return status; |
299 | } | |
300 | EXPORT_SYMBOL(acpi_run_osc); | |
301 | ||
eccddd32 | 302 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
303 | |
304 | /* | |
305 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
306 | * OSPM supports platform coordinated low power idle(LPI) states | |
307 | */ | |
308 | bool osc_pc_lpi_support_confirmed; | |
309 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
310 | ||
3563ff96 SL |
311 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
312 | static void acpi_bus_osc_support(void) | |
313 | { | |
314 | u32 capbuf[2]; | |
315 | struct acpi_osc_context context = { | |
316 | .uuid_str = sb_uuid_str, | |
317 | .rev = 1, | |
318 | .cap.length = 8, | |
319 | .cap.pointer = capbuf, | |
320 | }; | |
321 | acpi_handle handle; | |
322 | ||
b938a229 BH |
323 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
324 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
325 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
326 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
327 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
328 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 329 | |
b938a229 | 330 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 331 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
c2f4191a | 332 | |
eccddd32 | 333 | if (!ghes_disable) |
b938a229 | 334 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
335 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
336 | return; | |
eccddd32 HY |
337 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
338 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 339 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 340 | osc_sb_apei_support_acked = |
b938a229 | 341 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
342 | osc_pc_lpi_support_confirmed = |
343 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
344 | } | |
3563ff96 | 345 | kfree(context.ret.pointer); |
eccddd32 HY |
346 | } |
347 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
348 | } |
349 | ||
1da177e4 LT |
350 | /* -------------------------------------------------------------------------- |
351 | Notification Handling | |
352 | -------------------------------------------------------------------------- */ | |
353 | ||
1da177e4 LT |
354 | /** |
355 | * acpi_bus_notify | |
356 | * --------------- | |
357 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
358 | */ | |
4be44fcd | 359 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 360 | { |
1a699476 | 361 | struct acpi_device *adev; |
6d278131 | 362 | struct acpi_driver *driver; |
1a699476 | 363 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 364 | bool hotplug_event = false; |
02c37bd8 | 365 | |
1da177e4 | 366 | switch (type) { |
1da177e4 | 367 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 368 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 369 | hotplug_event = true; |
1da177e4 LT |
370 | break; |
371 | ||
372 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 373 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 374 | hotplug_event = true; |
1da177e4 LT |
375 | break; |
376 | ||
377 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 378 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
379 | break; |
380 | ||
381 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 382 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 383 | hotplug_event = true; |
1da177e4 LT |
384 | break; |
385 | ||
386 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 387 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
388 | /* TBD: Exactly what does 'light' mean? */ |
389 | break; | |
390 | ||
391 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
392 | acpi_handle_err(handle, "Device cannot be configured due " |
393 | "to a frequency mismatch\n"); | |
1da177e4 LT |
394 | break; |
395 | ||
396 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
397 | acpi_handle_err(handle, "Device cannot be configured due " |
398 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
399 | break; |
400 | ||
401 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 402 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
403 | break; |
404 | ||
405 | default: | |
f66abe92 RW |
406 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
407 | break; | |
1da177e4 LT |
408 | } |
409 | ||
1a699476 RW |
410 | adev = acpi_bus_get_acpi_device(handle); |
411 | if (!adev) | |
412 | goto err; | |
78ea4639 | 413 | |
1a699476 RW |
414 | driver = adev->driver; |
415 | if (driver && driver->ops.notify && | |
416 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
417 | driver->ops.notify(adev, type); | |
418 | ||
d0103387 RW |
419 | if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
420 | return; | |
421 | ||
1a699476 RW |
422 | acpi_bus_put_acpi_device(adev); |
423 | return; | |
424 | ||
425 | err: | |
700b8422 | 426 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
427 | } |
428 | ||
5894b0c4 RW |
429 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
430 | { | |
431 | struct acpi_device *device = data; | |
432 | ||
433 | device->driver->ops.notify(device, event); | |
434 | } | |
435 | ||
436 | static void acpi_device_notify_fixed(void *data) | |
437 | { | |
438 | struct acpi_device *device = data; | |
439 | ||
440 | /* Fixed hardware devices have no handles */ | |
441 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
442 | } | |
443 | ||
444 | static u32 acpi_device_fixed_event(void *data) | |
445 | { | |
446 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
447 | return ACPI_INTERRUPT_HANDLED; | |
448 | } | |
449 | ||
450 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
451 | { | |
452 | acpi_status status; | |
453 | ||
454 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
455 | status = | |
456 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
457 | acpi_device_fixed_event, | |
458 | device); | |
459 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
460 | status = | |
461 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
462 | acpi_device_fixed_event, | |
463 | device); | |
464 | else | |
465 | status = acpi_install_notify_handler(device->handle, | |
466 | ACPI_DEVICE_NOTIFY, | |
467 | acpi_device_notify, | |
468 | device); | |
469 | ||
470 | if (ACPI_FAILURE(status)) | |
471 | return -EINVAL; | |
472 | return 0; | |
473 | } | |
474 | ||
475 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
476 | { | |
477 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
478 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
479 | acpi_device_fixed_event); | |
480 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
481 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
482 | acpi_device_fixed_event); | |
483 | else | |
484 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
485 | acpi_device_notify); | |
486 | } | |
487 | ||
baa0c019 PP |
488 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
489 | ||
490 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
491 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
492 | ||
493 | static void sb_notify_work(struct work_struct *dummy) | |
494 | { | |
495 | acpi_handle sb_handle; | |
496 | ||
497 | orderly_poweroff(true); | |
498 | ||
499 | /* | |
500 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
501 | * to evaluate _OST method once every 10seconds to indicate that | |
502 | * the shutdown is in progress | |
503 | */ | |
504 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
505 | while (1) { | |
506 | pr_info("Graceful shutdown in progress.\n"); | |
507 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
508 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
509 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
510 | } | |
511 | } | |
512 | ||
513 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
514 | { | |
515 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
516 | ||
517 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
518 | if (!work_busy(&acpi_sb_work)) | |
519 | schedule_work(&acpi_sb_work); | |
520 | } else | |
521 | pr_warn("event %x is not supported by \\_SB device\n", event); | |
522 | } | |
523 | ||
524 | static int __init acpi_setup_sb_notify_handler(void) | |
525 | { | |
526 | acpi_handle sb_handle; | |
527 | ||
528 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
529 | return -ENXIO; | |
530 | ||
531 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
532 | acpi_sb_notify, NULL))) | |
533 | return -EINVAL; | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
68c6b148 RW |
538 | /* -------------------------------------------------------------------------- |
539 | Device Matching | |
540 | -------------------------------------------------------------------------- */ | |
541 | ||
3b95bd16 AM |
542 | /** |
543 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
544 | * @adev: ACPI device in question | |
545 | * | |
546 | * Return: First physical node of ACPI device @adev | |
547 | */ | |
548 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
549 | { |
550 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 551 | struct device *phys_dev; |
e91a398c RW |
552 | |
553 | mutex_lock(physical_node_lock); | |
554 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 555 | phys_dev = NULL; |
e91a398c RW |
556 | } else { |
557 | const struct acpi_device_physical_node *node; | |
558 | ||
559 | node = list_first_entry(&adev->physical_node_list, | |
560 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
561 | |
562 | phys_dev = node->dev; | |
e91a398c RW |
563 | } |
564 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
565 | return phys_dev; |
566 | } | |
567 | ||
568 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
569 | const struct device *dev) | |
570 | { | |
571 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
572 | ||
573 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
574 | } |
575 | ||
3431e490 RW |
576 | /** |
577 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
578 | * @adev: ACPI companion device | |
579 | * @dev: Physical device to check | |
580 | * | |
581 | * Function checks if given @dev is the first physical devices attached to | |
582 | * the ACPI companion device. This distinction is needed in some cases | |
583 | * where the same companion device is shared between many physical devices. | |
584 | * | |
585 | * Note that the caller have to provide valid @adev pointer. | |
586 | */ | |
587 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
588 | const struct device *dev) | |
589 | { | |
e91a398c | 590 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
591 | } |
592 | ||
68c6b148 RW |
593 | /* |
594 | * acpi_companion_match() - Can we match via ACPI companion device | |
595 | * @dev: Device in question | |
596 | * | |
597 | * Check if the given device has an ACPI companion and if that companion has | |
598 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
599 | * device associated with it. Return the companion pointer if that's the case | |
600 | * or NULL otherwise. | |
601 | * | |
602 | * If multiple physical devices are attached to a single ACPI companion, we need | |
603 | * to be careful. The usage scenario for this kind of relationship is that all | |
604 | * of the physical devices in question use resources provided by the ACPI | |
605 | * companion. A typical case is an MFD device where all the sub-devices share | |
606 | * the parent's ACPI companion. In such cases we can only allow the primary | |
607 | * (first) physical device to be matched with the help of the companion's PNP | |
608 | * IDs. | |
609 | * | |
610 | * Additional physical devices sharing the ACPI companion can still use | |
611 | * resources available from it but they will be matched normally using functions | |
612 | * provided by their bus types (and analogously for their modalias). | |
613 | */ | |
614 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
615 | { | |
616 | struct acpi_device *adev; | |
68c6b148 RW |
617 | |
618 | adev = ACPI_COMPANION(dev); | |
619 | if (!adev) | |
620 | return NULL; | |
621 | ||
622 | if (list_empty(&adev->pnp.ids)) | |
623 | return NULL; | |
624 | ||
e91a398c | 625 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
626 | } |
627 | ||
628 | /** | |
629 | * acpi_of_match_device - Match device object using the "compatible" property. | |
630 | * @adev: ACPI device object to match. | |
631 | * @of_match_table: List of device IDs to match against. | |
632 | * | |
633 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
634 | * identifiers and a _DSD object with the "compatible" property, use that | |
635 | * property to match against the given list of identifiers. | |
636 | */ | |
637 | static bool acpi_of_match_device(struct acpi_device *adev, | |
638 | const struct of_device_id *of_match_table) | |
639 | { | |
640 | const union acpi_object *of_compatible, *obj; | |
641 | int i, nval; | |
642 | ||
643 | if (!adev) | |
644 | return false; | |
645 | ||
646 | of_compatible = adev->data.of_compatible; | |
647 | if (!of_match_table || !of_compatible) | |
648 | return false; | |
649 | ||
650 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
651 | nval = of_compatible->package.count; | |
652 | obj = of_compatible->package.elements; | |
653 | } else { /* Must be ACPI_TYPE_STRING. */ | |
654 | nval = 1; | |
655 | obj = of_compatible; | |
656 | } | |
657 | /* Now we can look for the driver DT compatible strings */ | |
658 | for (i = 0; i < nval; i++, obj++) { | |
659 | const struct of_device_id *id; | |
660 | ||
661 | for (id = of_match_table; id->compatible[0]; id++) | |
662 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
663 | return true; | |
664 | } | |
665 | ||
666 | return false; | |
667 | } | |
668 | ||
669 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, | |
670 | struct acpi_hardware_id *hwid) | |
671 | { | |
672 | int i, msk, byte_shift; | |
673 | char buf[3]; | |
674 | ||
675 | if (!id->cls) | |
676 | return false; | |
677 | ||
678 | /* Apply class-code bitmask, before checking each class-code byte */ | |
679 | for (i = 1; i <= 3; i++) { | |
680 | byte_shift = 8 * (3 - i); | |
681 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
682 | if (!msk) | |
683 | continue; | |
684 | ||
685 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
686 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
687 | return false; | |
688 | } | |
689 | return true; | |
690 | } | |
691 | ||
692 | static const struct acpi_device_id *__acpi_match_device( | |
693 | struct acpi_device *device, | |
694 | const struct acpi_device_id *ids, | |
695 | const struct of_device_id *of_ids) | |
696 | { | |
697 | const struct acpi_device_id *id; | |
698 | struct acpi_hardware_id *hwid; | |
699 | ||
700 | /* | |
701 | * If the device is not present, it is unnecessary to load device | |
702 | * driver for it. | |
703 | */ | |
704 | if (!device || !device->status.present) | |
705 | return NULL; | |
706 | ||
707 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
708 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
709 | for (id = ids; id->id[0] || id->cls; id++) { | |
710 | if (id->id[0] && !strcmp((char *) id->id, hwid->id)) | |
711 | return id; | |
712 | else if (id->cls && __acpi_match_device_cls(id, hwid)) | |
713 | return id; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
718 | * "compatible" property if found. | |
719 | * | |
720 | * The id returned by the below is not valid, but the only | |
721 | * caller passing non-NULL of_ids here is only interested in | |
722 | * whether or not the return value is NULL. | |
723 | */ | |
724 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) | |
725 | && acpi_of_match_device(device, of_ids)) | |
726 | return id; | |
727 | } | |
728 | return NULL; | |
729 | } | |
730 | ||
731 | /** | |
732 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
733 | * @ids: Array of struct acpi_device_id object to match against. | |
734 | * @dev: The device structure to match. | |
735 | * | |
736 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
737 | * object for that handle and use that object to match against a given list of | |
738 | * device IDs. | |
739 | * | |
740 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
741 | */ | |
742 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
743 | const struct device *dev) | |
744 | { | |
745 | return __acpi_match_device(acpi_companion_match(dev), ids, NULL); | |
746 | } | |
747 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
748 | ||
749 | int acpi_match_device_ids(struct acpi_device *device, | |
750 | const struct acpi_device_id *ids) | |
751 | { | |
752 | return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; | |
753 | } | |
754 | EXPORT_SYMBOL(acpi_match_device_ids); | |
755 | ||
756 | bool acpi_driver_match_device(struct device *dev, | |
757 | const struct device_driver *drv) | |
758 | { | |
759 | if (!drv->acpi_match_table) | |
760 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
761 | drv->of_match_table); | |
762 | ||
763 | return !!__acpi_match_device(acpi_companion_match(dev), | |
764 | drv->acpi_match_table, drv->of_match_table); | |
765 | } | |
766 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
767 | ||
5894b0c4 RW |
768 | /* -------------------------------------------------------------------------- |
769 | ACPI Driver Management | |
770 | -------------------------------------------------------------------------- */ | |
771 | ||
772 | /** | |
773 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
774 | * @driver: driver being registered | |
775 | * | |
776 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
777 | * devices that match the driver's criteria and binds. Returns zero for | |
778 | * success or a negative error status for failure. | |
779 | */ | |
780 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
781 | { | |
782 | int ret; | |
783 | ||
784 | if (acpi_disabled) | |
785 | return -ENODEV; | |
786 | driver->drv.name = driver->name; | |
787 | driver->drv.bus = &acpi_bus_type; | |
788 | driver->drv.owner = driver->owner; | |
789 | ||
790 | ret = driver_register(&driver->drv); | |
791 | return ret; | |
792 | } | |
793 | ||
794 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
795 | ||
796 | /** | |
797 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
798 | * @driver: driver to unregister | |
799 | * | |
800 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
801 | * devices that match the driver's criteria and unbinds. | |
802 | */ | |
803 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
804 | { | |
805 | driver_unregister(&driver->drv); | |
806 | } | |
807 | ||
808 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
809 | ||
810 | /* -------------------------------------------------------------------------- | |
811 | ACPI Bus operations | |
812 | -------------------------------------------------------------------------- */ | |
813 | ||
814 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
815 | { | |
816 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
817 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
818 | ||
819 | return acpi_dev->flags.match_driver | |
820 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
821 | } | |
822 | ||
823 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
824 | { | |
825 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
826 | } | |
827 | ||
828 | static int acpi_device_probe(struct device *dev) | |
829 | { | |
830 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
831 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
832 | int ret; | |
833 | ||
834 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
835 | return -EINVAL; | |
836 | ||
837 | if (!acpi_drv->ops.add) | |
838 | return -ENOSYS; | |
839 | ||
840 | ret = acpi_drv->ops.add(acpi_dev); | |
841 | if (ret) | |
842 | return ret; | |
843 | ||
844 | acpi_dev->driver = acpi_drv; | |
845 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
846 | "Driver [%s] successfully bound to device [%s]\n", | |
847 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
848 | ||
849 | if (acpi_drv->ops.notify) { | |
850 | ret = acpi_device_install_notify_handler(acpi_dev); | |
851 | if (ret) { | |
852 | if (acpi_drv->ops.remove) | |
853 | acpi_drv->ops.remove(acpi_dev); | |
854 | ||
855 | acpi_dev->driver = NULL; | |
856 | acpi_dev->driver_data = NULL; | |
857 | return ret; | |
858 | } | |
859 | } | |
860 | ||
861 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
862 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
863 | get_device(dev); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | static int acpi_device_remove(struct device * dev) | |
868 | { | |
869 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
870 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
871 | ||
872 | if (acpi_drv) { | |
873 | if (acpi_drv->ops.notify) | |
874 | acpi_device_remove_notify_handler(acpi_dev); | |
875 | if (acpi_drv->ops.remove) | |
876 | acpi_drv->ops.remove(acpi_dev); | |
877 | } | |
878 | acpi_dev->driver = NULL; | |
879 | acpi_dev->driver_data = NULL; | |
880 | ||
881 | put_device(dev); | |
882 | return 0; | |
883 | } | |
884 | ||
885 | struct bus_type acpi_bus_type = { | |
886 | .name = "acpi", | |
887 | .match = acpi_bus_match, | |
888 | .probe = acpi_device_probe, | |
889 | .remove = acpi_device_remove, | |
890 | .uevent = acpi_device_uevent, | |
891 | }; | |
892 | ||
1da177e4 LT |
893 | /* -------------------------------------------------------------------------- |
894 | Initialization/Cleanup | |
895 | -------------------------------------------------------------------------- */ | |
896 | ||
4be44fcd | 897 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 898 | { |
6a8c0af6 | 899 | acpi_status status; |
4be44fcd | 900 | char *message = NULL; |
1da177e4 | 901 | |
1da177e4 | 902 | |
aafbcd16 | 903 | /* |
1da177e4 LT |
904 | * Let the system know what interrupt model we are using by |
905 | * evaluating the \_PIC object, if exists. | |
906 | */ | |
907 | ||
908 | switch (acpi_irq_model) { | |
909 | case ACPI_IRQ_MODEL_PIC: | |
910 | message = "PIC"; | |
911 | break; | |
912 | case ACPI_IRQ_MODEL_IOAPIC: | |
913 | message = "IOAPIC"; | |
914 | break; | |
915 | case ACPI_IRQ_MODEL_IOSAPIC: | |
916 | message = "IOSAPIC"; | |
917 | break; | |
fbe61ec7 HG |
918 | case ACPI_IRQ_MODEL_GIC: |
919 | message = "GIC"; | |
920 | break; | |
3948ec94 JK |
921 | case ACPI_IRQ_MODEL_PLATFORM: |
922 | message = "platform specific model"; | |
923 | break; | |
1da177e4 LT |
924 | default: |
925 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 926 | return -ENODEV; |
1da177e4 LT |
927 | } |
928 | ||
929 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
930 | ||
0db98202 | 931 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 932 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 933 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 934 | return -ENODEV; |
1da177e4 LT |
935 | } |
936 | ||
d550d98d | 937 | return 0; |
1da177e4 LT |
938 | } |
939 | ||
b064a8fa RW |
940 | /** |
941 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
942 | * | |
943 | * The ACPI tables are accessible after this, but the handling of events has not | |
944 | * been initialized and the global lock is not available yet, so AML should not | |
945 | * be executed at this point. | |
946 | * | |
947 | * Doing this before switching the EFI runtime services to virtual mode allows | |
948 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
949 | */ | |
4be44fcd | 950 | void __init acpi_early_init(void) |
1da177e4 | 951 | { |
6a8c0af6 | 952 | acpi_status status; |
1da177e4 LT |
953 | |
954 | if (acpi_disabled) | |
d550d98d | 955 | return; |
1da177e4 | 956 | |
61686124 BM |
957 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
958 | ||
4fc0a7e8 LZ |
959 | /* It's safe to verify table checksums during late stage */ |
960 | acpi_gbl_verify_table_checksum = TRUE; | |
961 | ||
1da177e4 LT |
962 | /* enable workarounds, unless strict ACPI spec. compliance */ |
963 | if (!acpi_strict) | |
964 | acpi_gbl_enable_interpreter_slack = TRUE; | |
965 | ||
ad71860a AS |
966 | acpi_gbl_permanent_mmap = 1; |
967 | ||
aa2110cb LM |
968 | /* |
969 | * If the machine falls into the DMI check table, | |
970 | * DSDT will be copied to memory | |
971 | */ | |
972 | dmi_check_system(dsdt_dmi_table); | |
973 | ||
ad71860a AS |
974 | status = acpi_reallocate_root_table(); |
975 | if (ACPI_FAILURE(status)) { | |
976 | printk(KERN_ERR PREFIX | |
977 | "Unable to reallocate ACPI tables\n"); | |
978 | goto error0; | |
979 | } | |
980 | ||
1da177e4 LT |
981 | status = acpi_initialize_subsystem(); |
982 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
983 | printk(KERN_ERR PREFIX |
984 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
985 | goto error0; |
986 | } | |
987 | ||
fe6cbea0 LZ |
988 | if (acpi_gbl_group_module_level_code) { |
989 | status = acpi_load_tables(); | |
990 | if (ACPI_FAILURE(status)) { | |
991 | printk(KERN_ERR PREFIX | |
992 | "Unable to load the System Description Tables\n"); | |
993 | goto error0; | |
994 | } | |
1da177e4 LT |
995 | } |
996 | ||
1da177e4 LT |
997 | #ifdef CONFIG_X86 |
998 | if (!acpi_ioapic) { | |
1da177e4 | 999 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1000 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1001 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1002 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1003 | } | |
1da177e4 | 1004 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1005 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1006 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1007 | } else { |
1da177e4 | 1008 | /* |
cee324b1 | 1009 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1010 | * update it with result from INT_SRC_OVR parsing |
1011 | */ | |
cee324b1 | 1012 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1013 | } |
1014 | #endif | |
b064a8fa RW |
1015 | return; |
1016 | ||
1017 | error0: | |
1018 | disable_acpi(); | |
1019 | } | |
1020 | ||
1021 | /** | |
1022 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1023 | * | |
3af03f77 | 1024 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1025 | * |
1026 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1027 | * done before all things that really depend on ACPI. The right spot appears to | |
1028 | * be before finalizing the EFI initialization. | |
1029 | */ | |
1030 | void __init acpi_subsystem_init(void) | |
1031 | { | |
1032 | acpi_status status; | |
1033 | ||
1034 | if (acpi_disabled) | |
1035 | return; | |
1da177e4 | 1036 | |
4505a201 | 1037 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
1038 | if (ACPI_FAILURE(status)) { |
1039 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
1040 | disable_acpi(); |
1041 | } else { | |
1042 | /* | |
1043 | * If the system is using ACPI then we can be reasonably | |
1044 | * confident that any regulators are managed by the firmware | |
1045 | * so tell the regulator core it has everything it needs to | |
1046 | * know. | |
1047 | */ | |
1048 | regulator_has_full_constraints(); | |
1da177e4 | 1049 | } |
1da177e4 LT |
1050 | } |
1051 | ||
68bdb677 OP |
1052 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1053 | { | |
1054 | acpi_scan_table_handler(event, table, context); | |
1055 | ||
1056 | return acpi_sysfs_table_handler(event, table, context); | |
1057 | } | |
1058 | ||
4be44fcd | 1059 | static int __init acpi_bus_init(void) |
1da177e4 | 1060 | { |
6a8c0af6 BH |
1061 | int result; |
1062 | acpi_status status; | |
1da177e4 | 1063 | |
176f9c18 | 1064 | acpi_os_initialize1(); |
1da177e4 | 1065 | |
1da177e4 LT |
1066 | /* |
1067 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
fe6cbea0 LZ |
1068 | * the EC device is found in the namespace (i.e. before |
1069 | * acpi_load_tables() is called). | |
1da177e4 | 1070 | * |
aafbcd16 | 1071 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
1072 | * the EC parameters out of that. |
1073 | */ | |
1074 | status = acpi_ec_ecdt_probe(); | |
1075 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 1076 | |
fe6cbea0 LZ |
1077 | if (!acpi_gbl_group_module_level_code) { |
1078 | status = acpi_load_tables(); | |
1079 | if (ACPI_FAILURE(status)) { | |
1080 | printk(KERN_ERR PREFIX | |
1081 | "Unable to load the System Description Tables\n"); | |
1082 | goto error1; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); | |
1087 | if (ACPI_FAILURE(status)) { | |
1088 | printk(KERN_ERR PREFIX | |
1089 | "Unable to start the ACPI Interpreter\n"); | |
1090 | goto error1; | |
1091 | } | |
1092 | ||
1da177e4 LT |
1093 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1094 | if (ACPI_FAILURE(status)) { | |
1095 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1096 | goto error1; | |
1097 | } | |
1098 | ||
a2121167 SP |
1099 | /* Set capability bits for _OSC under processor scope */ |
1100 | acpi_early_processor_osc(); | |
1101 | ||
fc54ab72 LM |
1102 | /* |
1103 | * _OSC method may exist in module level code, | |
1104 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1105 | */ | |
1106 | acpi_bus_osc_support(); | |
1107 | ||
b1d248d9 ZR |
1108 | /* |
1109 | * _PDC control method may load dynamic SSDT tables, | |
1110 | * and we need to install the table handler before that. | |
1111 | */ | |
68bdb677 OP |
1112 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1113 | ||
b1d248d9 ZR |
1114 | acpi_sysfs_init(); |
1115 | ||
78f16996 AC |
1116 | acpi_early_processor_set_pdc(); |
1117 | ||
455c8793 ZY |
1118 | /* |
1119 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1120 | * is necessary to enable it as early as possible. | |
1121 | */ | |
dcf15cbd | 1122 | acpi_ec_dsdt_probe(); |
455c8793 | 1123 | |
1da177e4 LT |
1124 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1125 | ||
aafbcd16 AS |
1126 | /* Initialize sleep structures */ |
1127 | acpi_sleep_init(); | |
1128 | ||
1da177e4 LT |
1129 | /* |
1130 | * Get the system interrupt model and evaluate \_PIC. | |
1131 | */ | |
1132 | result = acpi_bus_init_irq(); | |
1133 | if (result) | |
1134 | goto error1; | |
1135 | ||
1136 | /* | |
1137 | * Register the for all standard device notifications. | |
1138 | */ | |
4be44fcd LB |
1139 | status = |
1140 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1141 | &acpi_bus_notify, NULL); | |
1da177e4 | 1142 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1143 | printk(KERN_ERR PREFIX |
1144 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1145 | goto error1; |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Create the top ACPI proc directory | |
1150 | */ | |
1151 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1152 | ||
1dcc3d33 RW |
1153 | result = bus_register(&acpi_bus_type); |
1154 | if (!result) | |
1155 | return 0; | |
1da177e4 LT |
1156 | |
1157 | /* Mimic structured exception handling */ | |
4be44fcd | 1158 | error1: |
1da177e4 | 1159 | acpi_terminate(); |
d550d98d | 1160 | return -ENODEV; |
1da177e4 LT |
1161 | } |
1162 | ||
99e0d2fc | 1163 | struct kobject *acpi_kobj; |
f2d4753f | 1164 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1165 | |
4be44fcd | 1166 | static int __init acpi_init(void) |
1da177e4 | 1167 | { |
6831c6ed | 1168 | int result; |
1da177e4 | 1169 | |
1da177e4 LT |
1170 | if (acpi_disabled) { |
1171 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1172 | return -ENODEV; |
1da177e4 LT |
1173 | } |
1174 | ||
f62ed9e3 | 1175 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1176 | if (!acpi_kobj) { |
96b2dd1f | 1177 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1178 | acpi_kobj = NULL; |
1179 | } | |
1da177e4 | 1180 | |
0e46517d | 1181 | init_acpi_device_notify(); |
1da177e4 | 1182 | result = acpi_bus_init(); |
6831c6ed | 1183 | if (result) { |
1da177e4 | 1184 | disable_acpi(); |
81d0273d | 1185 | return result; |
6831c6ed | 1186 | } |
81d0273d | 1187 | |
6831c6ed | 1188 | pci_mmcfg_late_init(); |
e747f274 | 1189 | acpi_scan_init(); |
a5f820fe | 1190 | acpi_ec_init(); |
a25ee920 | 1191 | acpi_debugfs_init(); |
9cee43e0 | 1192 | acpi_sleep_proc_init(); |
201b8c65 | 1193 | acpi_wakeup_device_init(); |
836d0830 | 1194 | acpi_debugger_init(); |
baa0c019 | 1195 | acpi_setup_sb_notify_handler(); |
6831c6ed | 1196 | return 0; |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | subsys_initcall(acpi_init); |