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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 | |
88ef16d8 | 39 | #include <linux/acpi_iort.h> |
7752d5cf | 40 | #include <linux/pci.h> |
eccddd32 | 41 | #include <acpi/apei.h> |
eb27cae8 | 42 | #include <linux/dmi.h> |
cd51e61c | 43 | #include <linux/suspend.h> |
1da177e4 | 44 | |
e60cc7a6 BH |
45 | #include "internal.h" |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 48 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 49 | |
4be44fcd LB |
50 | struct acpi_device *acpi_root; |
51 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
52 | EXPORT_SYMBOL(acpi_root_dir); |
53 | ||
cce4f632 | 54 | #ifdef CONFIG_X86 |
73577d1d LZ |
55 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
56 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
57 | { | |
58 | return 0; | |
59 | } | |
60 | #else | |
aa2110cb LM |
61 | static int set_copy_dsdt(const struct dmi_system_id *id) |
62 | { | |
63 | printk(KERN_NOTICE "%s detected - " | |
64 | "force copy of DSDT to local memory\n", id->ident); | |
65 | acpi_gbl_copy_dsdt_locally = 1; | |
66 | return 0; | |
67 | } | |
73577d1d | 68 | #endif |
aa2110cb LM |
69 | |
70 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
71 | /* | |
100cf877 | 72 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
73 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
74 | */ | |
75 | { | |
76 | .callback = set_copy_dsdt, | |
100cf877 | 77 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
78 | .matches = { |
79 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 80 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 81 | }, |
cce4f632 LM |
82 | }, |
83 | {} | |
aa2110cb | 84 | }; |
cce4f632 LM |
85 | #else |
86 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
87 | {} | |
88 | }; | |
89 | #endif | |
aa2110cb | 90 | |
1da177e4 LT |
91 | /* -------------------------------------------------------------------------- |
92 | Device Management | |
93 | -------------------------------------------------------------------------- */ | |
94 | ||
402ac536 BH |
95 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
96 | unsigned long long *sta) | |
1da177e4 | 97 | { |
402ac536 | 98 | acpi_status status; |
4be44fcd | 99 | |
402ac536 BH |
100 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
101 | if (ACPI_SUCCESS(status)) | |
102 | return AE_OK; | |
1da177e4 | 103 | |
402ac536 BH |
104 | if (status == AE_NOT_FOUND) { |
105 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
106 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
107 | return AE_OK; | |
1da177e4 | 108 | } |
402ac536 BH |
109 | return status; |
110 | } | |
1da177e4 | 111 | |
402ac536 BH |
112 | int acpi_bus_get_status(struct acpi_device *device) |
113 | { | |
114 | acpi_status status; | |
115 | unsigned long long sta; | |
116 | ||
b7ecf663 HG |
117 | if (acpi_device_always_present(device)) { |
118 | acpi_set_device_status(device, ACPI_STA_DEFAULT); | |
119 | return 0; | |
120 | } | |
121 | ||
402ac536 BH |
122 | status = acpi_bus_get_status_handle(device->handle, &sta); |
123 | if (ACPI_FAILURE(status)) | |
124 | return -ENODEV; | |
125 | ||
25db115b | 126 | acpi_set_device_status(device, sta); |
1da177e4 LT |
127 | |
128 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
129 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
130 | "functional but not present;\n", | |
25db115b | 131 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
132 | } |
133 | ||
4be44fcd | 134 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 135 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 136 | return 0; |
1da177e4 | 137 | } |
4be44fcd | 138 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 139 | |
20733939 | 140 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 141 | void *context) |
20733939 ZR |
142 | { |
143 | return; | |
144 | } | |
145 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
146 | ||
72013795 LT |
147 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
148 | { | |
149 | acpi_status status; | |
150 | ||
151 | status = acpi_attach_data(handle, | |
152 | acpi_bus_private_data_handler, data); | |
153 | if (ACPI_FAILURE(status)) { | |
154 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
155 | return -ENODEV; | |
156 | } | |
157 | ||
158 | return 0; | |
159 | } | |
160 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
161 | ||
20733939 ZR |
162 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
163 | { | |
6a8c0af6 | 164 | acpi_status status; |
20733939 ZR |
165 | |
166 | if (!*data) | |
167 | return -EINVAL; | |
168 | ||
169 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
170 | if (ACPI_FAILURE(status)) { |
171 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
172 | return -ENODEV; |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
72013795 LT |
177 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
178 | ||
179 | void acpi_bus_detach_private_data(acpi_handle handle) | |
180 | { | |
181 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
182 | } | |
183 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 184 | |
70023de8 | 185 | static void acpi_print_osc_error(acpi_handle handle, |
f26f5c8b | 186 | struct acpi_osc_context *context, char *error) |
70023de8 | 187 | { |
70023de8 SL |
188 | int i; |
189 | ||
f26f5c8b RW |
190 | acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); |
191 | ||
192 | pr_debug("_OSC request data:"); | |
70023de8 | 193 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
f26f5c8b RW |
194 | pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); |
195 | ||
196 | pr_debug("\n"); | |
70023de8 SL |
197 | } |
198 | ||
4b3db708 | 199 | acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
70023de8 SL |
200 | { |
201 | int i; | |
202 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
203 | 24, 26, 28, 30, 32, 34}; | |
204 | ||
205 | if (strlen(str) != 36) | |
206 | return AE_BAD_PARAMETER; | |
207 | for (i = 0; i < 36; i++) { | |
208 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
209 | if (str[i] != '-') | |
210 | return AE_BAD_PARAMETER; | |
211 | } else if (!isxdigit(str[i])) | |
212 | return AE_BAD_PARAMETER; | |
213 | } | |
214 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
215 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
216 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
217 | } |
218 | return AE_OK; | |
219 | } | |
4b3db708 | 220 | EXPORT_SYMBOL_GPL(acpi_str_to_uuid); |
70023de8 SL |
221 | |
222 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
223 | { | |
224 | acpi_status status; | |
225 | struct acpi_object_list input; | |
226 | union acpi_object in_params[4]; | |
227 | union acpi_object *out_obj; | |
228 | u8 uuid[16]; | |
229 | u32 errors; | |
9dc130fc | 230 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
231 | |
232 | if (!context) | |
233 | return AE_ERROR; | |
234 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
235 | return AE_ERROR; | |
236 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
237 | context->ret.pointer = NULL; | |
238 | ||
239 | /* Setting up input parameters */ | |
240 | input.count = 4; | |
241 | input.pointer = in_params; | |
242 | in_params[0].type = ACPI_TYPE_BUFFER; | |
243 | in_params[0].buffer.length = 16; | |
244 | in_params[0].buffer.pointer = uuid; | |
245 | in_params[1].type = ACPI_TYPE_INTEGER; | |
246 | in_params[1].integer.value = context->rev; | |
247 | in_params[2].type = ACPI_TYPE_INTEGER; | |
248 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
249 | in_params[3].type = ACPI_TYPE_BUFFER; | |
250 | in_params[3].buffer.length = context->cap.length; | |
251 | in_params[3].buffer.pointer = context->cap.pointer; | |
252 | ||
9dc130fc | 253 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
254 | if (ACPI_FAILURE(status)) |
255 | return status; | |
256 | ||
9dc130fc | 257 | if (!output.length) |
70023de8 SL |
258 | return AE_NULL_OBJECT; |
259 | ||
9dc130fc SL |
260 | out_obj = output.pointer; |
261 | if (out_obj->type != ACPI_TYPE_BUFFER | |
262 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
263 | acpi_print_osc_error(handle, context, |
264 | "_OSC evaluation returned wrong type"); | |
265 | status = AE_TYPE; | |
266 | goto out_kfree; | |
267 | } | |
268 | /* Need to ignore the bit0 in result code */ | |
269 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
270 | if (errors) { | |
271 | if (errors & OSC_REQUEST_ERROR) | |
272 | acpi_print_osc_error(handle, context, | |
273 | "_OSC request failed"); | |
274 | if (errors & OSC_INVALID_UUID_ERROR) | |
275 | acpi_print_osc_error(handle, context, | |
276 | "_OSC invalid UUID"); | |
277 | if (errors & OSC_INVALID_REVISION_ERROR) | |
278 | acpi_print_osc_error(handle, context, | |
279 | "_OSC invalid revision"); | |
280 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 281 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
282 | & OSC_QUERY_ENABLE) |
283 | goto out_success; | |
284 | status = AE_SUPPORT; | |
285 | goto out_kfree; | |
286 | } | |
287 | status = AE_ERROR; | |
288 | goto out_kfree; | |
289 | } | |
290 | out_success: | |
9dc130fc | 291 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
292 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
293 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
294 | if (!context->ret.pointer) { |
295 | status = AE_NO_MEMORY; | |
296 | goto out_kfree; | |
297 | } | |
9dc130fc | 298 | status = AE_OK; |
70023de8 SL |
299 | |
300 | out_kfree: | |
9dc130fc SL |
301 | kfree(output.pointer); |
302 | if (status != AE_OK) | |
303 | context->ret.pointer = NULL; | |
70023de8 SL |
304 | return status; |
305 | } | |
306 | EXPORT_SYMBOL(acpi_run_osc); | |
307 | ||
eccddd32 | 308 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
309 | |
310 | /* | |
311 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
312 | * OSPM supports platform coordinated low power idle(LPI) states | |
313 | */ | |
314 | bool osc_pc_lpi_support_confirmed; | |
315 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
316 | ||
3563ff96 SL |
317 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
318 | static void acpi_bus_osc_support(void) | |
319 | { | |
320 | u32 capbuf[2]; | |
321 | struct acpi_osc_context context = { | |
322 | .uuid_str = sb_uuid_str, | |
323 | .rev = 1, | |
324 | .cap.length = 8, | |
325 | .cap.pointer = capbuf, | |
326 | }; | |
327 | acpi_handle handle; | |
328 | ||
b938a229 BH |
329 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
330 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
331 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
332 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
333 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
334 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 335 | |
b938a229 | 336 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 337 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
c2f4191a | 338 | |
5c2832e9 SP |
339 | #ifdef CONFIG_X86 |
340 | if (boot_cpu_has(X86_FEATURE_HWP)) { | |
341 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
342 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
343 | } | |
344 | #endif | |
345 | ||
de966cf4 | 346 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
347 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
348 | ||
eccddd32 | 349 | if (!ghes_disable) |
b938a229 | 350 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
351 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
352 | return; | |
eccddd32 HY |
353 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
354 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 355 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 356 | osc_sb_apei_support_acked = |
b938a229 | 357 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
358 | osc_pc_lpi_support_confirmed = |
359 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
360 | } | |
3563ff96 | 361 | kfree(context.ret.pointer); |
eccddd32 HY |
362 | } |
363 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
364 | } |
365 | ||
1da177e4 LT |
366 | /* -------------------------------------------------------------------------- |
367 | Notification Handling | |
368 | -------------------------------------------------------------------------- */ | |
369 | ||
1da177e4 LT |
370 | /** |
371 | * acpi_bus_notify | |
372 | * --------------- | |
373 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
374 | */ | |
4be44fcd | 375 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 376 | { |
1a699476 | 377 | struct acpi_device *adev; |
6d278131 | 378 | struct acpi_driver *driver; |
1a699476 | 379 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 380 | bool hotplug_event = false; |
02c37bd8 | 381 | |
1da177e4 | 382 | switch (type) { |
1da177e4 | 383 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 384 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 385 | hotplug_event = true; |
1da177e4 LT |
386 | break; |
387 | ||
388 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 389 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 390 | hotplug_event = true; |
1da177e4 LT |
391 | break; |
392 | ||
393 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 394 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
395 | break; |
396 | ||
397 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 398 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 399 | hotplug_event = true; |
1da177e4 LT |
400 | break; |
401 | ||
402 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 403 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
404 | /* TBD: Exactly what does 'light' mean? */ |
405 | break; | |
406 | ||
407 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
408 | acpi_handle_err(handle, "Device cannot be configured due " |
409 | "to a frequency mismatch\n"); | |
1da177e4 LT |
410 | break; |
411 | ||
412 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
413 | acpi_handle_err(handle, "Device cannot be configured due " |
414 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
415 | break; |
416 | ||
417 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 418 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
419 | break; |
420 | ||
421 | default: | |
f66abe92 RW |
422 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
423 | break; | |
1da177e4 LT |
424 | } |
425 | ||
1a699476 RW |
426 | adev = acpi_bus_get_acpi_device(handle); |
427 | if (!adev) | |
428 | goto err; | |
78ea4639 | 429 | |
1a699476 RW |
430 | driver = adev->driver; |
431 | if (driver && driver->ops.notify && | |
432 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
433 | driver->ops.notify(adev, type); | |
434 | ||
d0103387 RW |
435 | if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
436 | return; | |
437 | ||
1a699476 RW |
438 | acpi_bus_put_acpi_device(adev); |
439 | return; | |
440 | ||
441 | err: | |
700b8422 | 442 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
443 | } |
444 | ||
5894b0c4 RW |
445 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
446 | { | |
447 | struct acpi_device *device = data; | |
448 | ||
449 | device->driver->ops.notify(device, event); | |
450 | } | |
451 | ||
452 | static void acpi_device_notify_fixed(void *data) | |
453 | { | |
454 | struct acpi_device *device = data; | |
455 | ||
456 | /* Fixed hardware devices have no handles */ | |
457 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
458 | } | |
459 | ||
460 | static u32 acpi_device_fixed_event(void *data) | |
461 | { | |
462 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
463 | return ACPI_INTERRUPT_HANDLED; | |
464 | } | |
465 | ||
466 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
467 | { | |
468 | acpi_status status; | |
469 | ||
470 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
471 | status = | |
472 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
473 | acpi_device_fixed_event, | |
474 | device); | |
475 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
476 | status = | |
477 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
478 | acpi_device_fixed_event, | |
479 | device); | |
480 | else | |
481 | status = acpi_install_notify_handler(device->handle, | |
482 | ACPI_DEVICE_NOTIFY, | |
483 | acpi_device_notify, | |
484 | device); | |
485 | ||
486 | if (ACPI_FAILURE(status)) | |
487 | return -EINVAL; | |
488 | return 0; | |
489 | } | |
490 | ||
491 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
492 | { | |
493 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
494 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
495 | acpi_device_fixed_event); | |
496 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
497 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
498 | acpi_device_fixed_event); | |
499 | else | |
500 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
501 | acpi_device_notify); | |
502 | } | |
503 | ||
baa0c019 PP |
504 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
505 | ||
506 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
507 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
508 | ||
509 | static void sb_notify_work(struct work_struct *dummy) | |
510 | { | |
511 | acpi_handle sb_handle; | |
512 | ||
513 | orderly_poweroff(true); | |
514 | ||
515 | /* | |
516 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
517 | * to evaluate _OST method once every 10seconds to indicate that | |
518 | * the shutdown is in progress | |
519 | */ | |
520 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
521 | while (1) { | |
522 | pr_info("Graceful shutdown in progress.\n"); | |
523 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
524 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
525 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
526 | } | |
527 | } | |
528 | ||
529 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
530 | { | |
531 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
532 | ||
533 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
534 | if (!work_busy(&acpi_sb_work)) | |
535 | schedule_work(&acpi_sb_work); | |
536 | } else | |
537 | pr_warn("event %x is not supported by \\_SB device\n", event); | |
538 | } | |
539 | ||
540 | static int __init acpi_setup_sb_notify_handler(void) | |
541 | { | |
542 | acpi_handle sb_handle; | |
543 | ||
544 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
545 | return -ENXIO; | |
546 | ||
547 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
548 | acpi_sb_notify, NULL))) | |
549 | return -EINVAL; | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
68c6b148 RW |
554 | /* -------------------------------------------------------------------------- |
555 | Device Matching | |
556 | -------------------------------------------------------------------------- */ | |
557 | ||
3b95bd16 AM |
558 | /** |
559 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
560 | * @adev: ACPI device in question | |
561 | * | |
562 | * Return: First physical node of ACPI device @adev | |
563 | */ | |
564 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
565 | { |
566 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 567 | struct device *phys_dev; |
e91a398c RW |
568 | |
569 | mutex_lock(physical_node_lock); | |
570 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 571 | phys_dev = NULL; |
e91a398c RW |
572 | } else { |
573 | const struct acpi_device_physical_node *node; | |
574 | ||
575 | node = list_first_entry(&adev->physical_node_list, | |
576 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
577 | |
578 | phys_dev = node->dev; | |
e91a398c RW |
579 | } |
580 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
581 | return phys_dev; |
582 | } | |
583 | ||
584 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
585 | const struct device *dev) | |
586 | { | |
587 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
588 | ||
589 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
590 | } |
591 | ||
3431e490 RW |
592 | /** |
593 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
594 | * @adev: ACPI companion device | |
595 | * @dev: Physical device to check | |
596 | * | |
597 | * Function checks if given @dev is the first physical devices attached to | |
598 | * the ACPI companion device. This distinction is needed in some cases | |
599 | * where the same companion device is shared between many physical devices. | |
600 | * | |
601 | * Note that the caller have to provide valid @adev pointer. | |
602 | */ | |
603 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
604 | const struct device *dev) | |
605 | { | |
e91a398c | 606 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
607 | } |
608 | ||
68c6b148 RW |
609 | /* |
610 | * acpi_companion_match() - Can we match via ACPI companion device | |
611 | * @dev: Device in question | |
612 | * | |
613 | * Check if the given device has an ACPI companion and if that companion has | |
614 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
615 | * device associated with it. Return the companion pointer if that's the case | |
616 | * or NULL otherwise. | |
617 | * | |
618 | * If multiple physical devices are attached to a single ACPI companion, we need | |
619 | * to be careful. The usage scenario for this kind of relationship is that all | |
620 | * of the physical devices in question use resources provided by the ACPI | |
621 | * companion. A typical case is an MFD device where all the sub-devices share | |
622 | * the parent's ACPI companion. In such cases we can only allow the primary | |
623 | * (first) physical device to be matched with the help of the companion's PNP | |
624 | * IDs. | |
625 | * | |
626 | * Additional physical devices sharing the ACPI companion can still use | |
627 | * resources available from it but they will be matched normally using functions | |
628 | * provided by their bus types (and analogously for their modalias). | |
629 | */ | |
630 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
631 | { | |
632 | struct acpi_device *adev; | |
68c6b148 RW |
633 | |
634 | adev = ACPI_COMPANION(dev); | |
635 | if (!adev) | |
636 | return NULL; | |
637 | ||
638 | if (list_empty(&adev->pnp.ids)) | |
639 | return NULL; | |
640 | ||
e91a398c | 641 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
642 | } |
643 | ||
644 | /** | |
645 | * acpi_of_match_device - Match device object using the "compatible" property. | |
646 | * @adev: ACPI device object to match. | |
647 | * @of_match_table: List of device IDs to match against. | |
648 | * | |
649 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
650 | * identifiers and a _DSD object with the "compatible" property, use that | |
651 | * property to match against the given list of identifiers. | |
652 | */ | |
653 | static bool acpi_of_match_device(struct acpi_device *adev, | |
654 | const struct of_device_id *of_match_table) | |
655 | { | |
656 | const union acpi_object *of_compatible, *obj; | |
657 | int i, nval; | |
658 | ||
659 | if (!adev) | |
660 | return false; | |
661 | ||
662 | of_compatible = adev->data.of_compatible; | |
663 | if (!of_match_table || !of_compatible) | |
664 | return false; | |
665 | ||
666 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
667 | nval = of_compatible->package.count; | |
668 | obj = of_compatible->package.elements; | |
669 | } else { /* Must be ACPI_TYPE_STRING. */ | |
670 | nval = 1; | |
671 | obj = of_compatible; | |
672 | } | |
673 | /* Now we can look for the driver DT compatible strings */ | |
674 | for (i = 0; i < nval; i++, obj++) { | |
675 | const struct of_device_id *id; | |
676 | ||
677 | for (id = of_match_table; id->compatible[0]; id++) | |
678 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
679 | return true; | |
680 | } | |
681 | ||
682 | return false; | |
683 | } | |
684 | ||
51ede5d9 DD |
685 | static bool acpi_of_modalias(struct acpi_device *adev, |
686 | char *modalias, size_t len) | |
687 | { | |
688 | const union acpi_object *of_compatible; | |
689 | const union acpi_object *obj; | |
690 | const char *str, *chr; | |
691 | ||
692 | of_compatible = adev->data.of_compatible; | |
693 | if (!of_compatible) | |
694 | return false; | |
695 | ||
696 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
697 | obj = of_compatible->package.elements; | |
698 | else /* Must be ACPI_TYPE_STRING. */ | |
699 | obj = of_compatible; | |
700 | ||
701 | str = obj->string.pointer; | |
702 | chr = strchr(str, ','); | |
703 | strlcpy(modalias, chr ? chr + 1 : str, len); | |
704 | ||
705 | return true; | |
706 | } | |
707 | ||
708 | /** | |
709 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
710 | * @adev: ACPI device object to match | |
711 | * @default_id: ID string to use as default if no compatible string found | |
712 | * @modalias: Pointer to buffer that modalias value will be copied into | |
713 | * @len: Length of modalias buffer | |
714 | * | |
715 | * This is a counterpart of of_modalias_node() for struct acpi_device objects. | |
716 | * If there is a compatible string for @adev, it will be copied to @modalias | |
717 | * with the vendor prefix stripped; otherwise, @default_id will be used. | |
718 | */ | |
719 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
720 | char *modalias, size_t len) | |
721 | { | |
722 | if (!acpi_of_modalias(adev, modalias, len)) | |
723 | strlcpy(modalias, default_id, len); | |
724 | } | |
725 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
726 | ||
68c6b148 RW |
727 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
728 | struct acpi_hardware_id *hwid) | |
729 | { | |
730 | int i, msk, byte_shift; | |
731 | char buf[3]; | |
732 | ||
733 | if (!id->cls) | |
734 | return false; | |
735 | ||
736 | /* Apply class-code bitmask, before checking each class-code byte */ | |
737 | for (i = 1; i <= 3; i++) { | |
738 | byte_shift = 8 * (3 - i); | |
739 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
740 | if (!msk) | |
741 | continue; | |
742 | ||
743 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
744 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
745 | return false; | |
746 | } | |
747 | return true; | |
748 | } | |
749 | ||
750 | static const struct acpi_device_id *__acpi_match_device( | |
751 | struct acpi_device *device, | |
752 | const struct acpi_device_id *ids, | |
753 | const struct of_device_id *of_ids) | |
754 | { | |
755 | const struct acpi_device_id *id; | |
756 | struct acpi_hardware_id *hwid; | |
757 | ||
758 | /* | |
759 | * If the device is not present, it is unnecessary to load device | |
760 | * driver for it. | |
761 | */ | |
762 | if (!device || !device->status.present) | |
763 | return NULL; | |
764 | ||
765 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
766 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
767 | for (id = ids; id->id[0] || id->cls; id++) { | |
768 | if (id->id[0] && !strcmp((char *) id->id, hwid->id)) | |
769 | return id; | |
770 | else if (id->cls && __acpi_match_device_cls(id, hwid)) | |
771 | return id; | |
772 | } | |
773 | ||
774 | /* | |
775 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
776 | * "compatible" property if found. | |
777 | * | |
778 | * The id returned by the below is not valid, but the only | |
779 | * caller passing non-NULL of_ids here is only interested in | |
780 | * whether or not the return value is NULL. | |
781 | */ | |
782 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) | |
783 | && acpi_of_match_device(device, of_ids)) | |
784 | return id; | |
785 | } | |
786 | return NULL; | |
787 | } | |
788 | ||
789 | /** | |
790 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
791 | * @ids: Array of struct acpi_device_id object to match against. | |
792 | * @dev: The device structure to match. | |
793 | * | |
794 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
795 | * object for that handle and use that object to match against a given list of | |
796 | * device IDs. | |
797 | * | |
798 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
799 | */ | |
800 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
801 | const struct device *dev) | |
802 | { | |
803 | return __acpi_match_device(acpi_companion_match(dev), ids, NULL); | |
804 | } | |
805 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
806 | ||
807 | int acpi_match_device_ids(struct acpi_device *device, | |
808 | const struct acpi_device_id *ids) | |
809 | { | |
810 | return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; | |
811 | } | |
812 | EXPORT_SYMBOL(acpi_match_device_ids); | |
813 | ||
814 | bool acpi_driver_match_device(struct device *dev, | |
815 | const struct device_driver *drv) | |
816 | { | |
817 | if (!drv->acpi_match_table) | |
818 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
819 | drv->of_match_table); | |
820 | ||
821 | return !!__acpi_match_device(acpi_companion_match(dev), | |
822 | drv->acpi_match_table, drv->of_match_table); | |
823 | } | |
824 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
825 | ||
5894b0c4 RW |
826 | /* -------------------------------------------------------------------------- |
827 | ACPI Driver Management | |
828 | -------------------------------------------------------------------------- */ | |
829 | ||
830 | /** | |
831 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
832 | * @driver: driver being registered | |
833 | * | |
834 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
835 | * devices that match the driver's criteria and binds. Returns zero for | |
836 | * success or a negative error status for failure. | |
837 | */ | |
838 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
839 | { | |
840 | int ret; | |
841 | ||
842 | if (acpi_disabled) | |
843 | return -ENODEV; | |
844 | driver->drv.name = driver->name; | |
845 | driver->drv.bus = &acpi_bus_type; | |
846 | driver->drv.owner = driver->owner; | |
847 | ||
848 | ret = driver_register(&driver->drv); | |
849 | return ret; | |
850 | } | |
851 | ||
852 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
853 | ||
854 | /** | |
855 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
856 | * @driver: driver to unregister | |
857 | * | |
858 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
859 | * devices that match the driver's criteria and unbinds. | |
860 | */ | |
861 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
862 | { | |
863 | driver_unregister(&driver->drv); | |
864 | } | |
865 | ||
866 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
867 | ||
868 | /* -------------------------------------------------------------------------- | |
869 | ACPI Bus operations | |
870 | -------------------------------------------------------------------------- */ | |
871 | ||
872 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
873 | { | |
874 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
875 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
876 | ||
877 | return acpi_dev->flags.match_driver | |
878 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
879 | } | |
880 | ||
881 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
882 | { | |
883 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
884 | } | |
885 | ||
886 | static int acpi_device_probe(struct device *dev) | |
887 | { | |
888 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
889 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
890 | int ret; | |
891 | ||
892 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
893 | return -EINVAL; | |
894 | ||
895 | if (!acpi_drv->ops.add) | |
896 | return -ENOSYS; | |
897 | ||
898 | ret = acpi_drv->ops.add(acpi_dev); | |
899 | if (ret) | |
900 | return ret; | |
901 | ||
902 | acpi_dev->driver = acpi_drv; | |
903 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
904 | "Driver [%s] successfully bound to device [%s]\n", | |
905 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
906 | ||
907 | if (acpi_drv->ops.notify) { | |
908 | ret = acpi_device_install_notify_handler(acpi_dev); | |
909 | if (ret) { | |
910 | if (acpi_drv->ops.remove) | |
911 | acpi_drv->ops.remove(acpi_dev); | |
912 | ||
913 | acpi_dev->driver = NULL; | |
914 | acpi_dev->driver_data = NULL; | |
915 | return ret; | |
916 | } | |
917 | } | |
918 | ||
919 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
920 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
921 | get_device(dev); | |
922 | return 0; | |
923 | } | |
924 | ||
925 | static int acpi_device_remove(struct device * dev) | |
926 | { | |
927 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
928 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
929 | ||
930 | if (acpi_drv) { | |
931 | if (acpi_drv->ops.notify) | |
932 | acpi_device_remove_notify_handler(acpi_dev); | |
933 | if (acpi_drv->ops.remove) | |
934 | acpi_drv->ops.remove(acpi_dev); | |
935 | } | |
936 | acpi_dev->driver = NULL; | |
937 | acpi_dev->driver_data = NULL; | |
938 | ||
939 | put_device(dev); | |
940 | return 0; | |
941 | } | |
942 | ||
943 | struct bus_type acpi_bus_type = { | |
944 | .name = "acpi", | |
945 | .match = acpi_bus_match, | |
946 | .probe = acpi_device_probe, | |
947 | .remove = acpi_device_remove, | |
948 | .uevent = acpi_device_uevent, | |
949 | }; | |
950 | ||
1da177e4 LT |
951 | /* -------------------------------------------------------------------------- |
952 | Initialization/Cleanup | |
953 | -------------------------------------------------------------------------- */ | |
954 | ||
4be44fcd | 955 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 956 | { |
6a8c0af6 | 957 | acpi_status status; |
4be44fcd | 958 | char *message = NULL; |
1da177e4 | 959 | |
1da177e4 | 960 | |
aafbcd16 | 961 | /* |
1da177e4 LT |
962 | * Let the system know what interrupt model we are using by |
963 | * evaluating the \_PIC object, if exists. | |
964 | */ | |
965 | ||
966 | switch (acpi_irq_model) { | |
967 | case ACPI_IRQ_MODEL_PIC: | |
968 | message = "PIC"; | |
969 | break; | |
970 | case ACPI_IRQ_MODEL_IOAPIC: | |
971 | message = "IOAPIC"; | |
972 | break; | |
973 | case ACPI_IRQ_MODEL_IOSAPIC: | |
974 | message = "IOSAPIC"; | |
975 | break; | |
fbe61ec7 HG |
976 | case ACPI_IRQ_MODEL_GIC: |
977 | message = "GIC"; | |
978 | break; | |
3948ec94 JK |
979 | case ACPI_IRQ_MODEL_PLATFORM: |
980 | message = "platform specific model"; | |
981 | break; | |
1da177e4 LT |
982 | default: |
983 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 984 | return -ENODEV; |
1da177e4 LT |
985 | } |
986 | ||
987 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
988 | ||
0db98202 | 989 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 990 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 991 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 992 | return -ENODEV; |
1da177e4 LT |
993 | } |
994 | ||
d550d98d | 995 | return 0; |
1da177e4 LT |
996 | } |
997 | ||
b064a8fa RW |
998 | /** |
999 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1000 | * | |
1001 | * The ACPI tables are accessible after this, but the handling of events has not | |
1002 | * been initialized and the global lock is not available yet, so AML should not | |
1003 | * be executed at this point. | |
1004 | * | |
1005 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1006 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1007 | */ | |
4be44fcd | 1008 | void __init acpi_early_init(void) |
1da177e4 | 1009 | { |
6a8c0af6 | 1010 | acpi_status status; |
1da177e4 LT |
1011 | |
1012 | if (acpi_disabled) | |
d550d98d | 1013 | return; |
1da177e4 | 1014 | |
61686124 BM |
1015 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
1016 | ||
4fc0a7e8 LZ |
1017 | /* It's safe to verify table checksums during late stage */ |
1018 | acpi_gbl_verify_table_checksum = TRUE; | |
1019 | ||
1da177e4 LT |
1020 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1021 | if (!acpi_strict) | |
1022 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1023 | ||
8d3523fb | 1024 | acpi_permanent_mmap = true; |
ad71860a | 1025 | |
aa2110cb LM |
1026 | /* |
1027 | * If the machine falls into the DMI check table, | |
1028 | * DSDT will be copied to memory | |
1029 | */ | |
1030 | dmi_check_system(dsdt_dmi_table); | |
1031 | ||
ad71860a AS |
1032 | status = acpi_reallocate_root_table(); |
1033 | if (ACPI_FAILURE(status)) { | |
1034 | printk(KERN_ERR PREFIX | |
1035 | "Unable to reallocate ACPI tables\n"); | |
1036 | goto error0; | |
1037 | } | |
1038 | ||
1da177e4 LT |
1039 | status = acpi_initialize_subsystem(); |
1040 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
1041 | printk(KERN_ERR PREFIX |
1042 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
1043 | goto error0; |
1044 | } | |
1045 | ||
1ef35668 LZ |
1046 | if (!acpi_gbl_parse_table_as_term_list && |
1047 | acpi_gbl_group_module_level_code) { | |
fe6cbea0 LZ |
1048 | status = acpi_load_tables(); |
1049 | if (ACPI_FAILURE(status)) { | |
1050 | printk(KERN_ERR PREFIX | |
1051 | "Unable to load the System Description Tables\n"); | |
1052 | goto error0; | |
1053 | } | |
1da177e4 LT |
1054 | } |
1055 | ||
1da177e4 LT |
1056 | #ifdef CONFIG_X86 |
1057 | if (!acpi_ioapic) { | |
1da177e4 | 1058 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1059 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1060 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1061 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1062 | } | |
1da177e4 | 1063 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1064 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1065 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1066 | } else { |
1da177e4 | 1067 | /* |
cee324b1 | 1068 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1069 | * update it with result from INT_SRC_OVR parsing |
1070 | */ | |
cee324b1 | 1071 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1072 | } |
1073 | #endif | |
b064a8fa RW |
1074 | return; |
1075 | ||
1076 | error0: | |
1077 | disable_acpi(); | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1082 | * | |
3af03f77 | 1083 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1084 | * |
1085 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1086 | * done before all things that really depend on ACPI. The right spot appears to | |
1087 | * be before finalizing the EFI initialization. | |
1088 | */ | |
1089 | void __init acpi_subsystem_init(void) | |
1090 | { | |
1091 | acpi_status status; | |
1092 | ||
1093 | if (acpi_disabled) | |
1094 | return; | |
1da177e4 | 1095 | |
4505a201 | 1096 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
1097 | if (ACPI_FAILURE(status)) { |
1098 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
1099 | disable_acpi(); |
1100 | } else { | |
1101 | /* | |
1102 | * If the system is using ACPI then we can be reasonably | |
1103 | * confident that any regulators are managed by the firmware | |
1104 | * so tell the regulator core it has everything it needs to | |
1105 | * know. | |
1106 | */ | |
1107 | regulator_has_full_constraints(); | |
1da177e4 | 1108 | } |
1da177e4 LT |
1109 | } |
1110 | ||
68bdb677 OP |
1111 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1112 | { | |
1113 | acpi_scan_table_handler(event, table, context); | |
1114 | ||
1115 | return acpi_sysfs_table_handler(event, table, context); | |
1116 | } | |
1117 | ||
4be44fcd | 1118 | static int __init acpi_bus_init(void) |
1da177e4 | 1119 | { |
6a8c0af6 BH |
1120 | int result; |
1121 | acpi_status status; | |
1da177e4 | 1122 | |
176f9c18 | 1123 | acpi_os_initialize1(); |
1da177e4 | 1124 | |
1da177e4 LT |
1125 | /* |
1126 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
fe6cbea0 LZ |
1127 | * the EC device is found in the namespace (i.e. before |
1128 | * acpi_load_tables() is called). | |
1da177e4 | 1129 | * |
aafbcd16 | 1130 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
1131 | * the EC parameters out of that. |
1132 | */ | |
1133 | status = acpi_ec_ecdt_probe(); | |
1134 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 1135 | |
1ef35668 LZ |
1136 | if (acpi_gbl_parse_table_as_term_list || |
1137 | !acpi_gbl_group_module_level_code) { | |
fe6cbea0 LZ |
1138 | status = acpi_load_tables(); |
1139 | if (ACPI_FAILURE(status)) { | |
1140 | printk(KERN_ERR PREFIX | |
1141 | "Unable to load the System Description Tables\n"); | |
1142 | goto error1; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); | |
1147 | if (ACPI_FAILURE(status)) { | |
1148 | printk(KERN_ERR PREFIX | |
1149 | "Unable to start the ACPI Interpreter\n"); | |
1150 | goto error1; | |
1151 | } | |
1152 | ||
1da177e4 LT |
1153 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1154 | if (ACPI_FAILURE(status)) { | |
1155 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1156 | goto error1; | |
1157 | } | |
1158 | ||
a2121167 SP |
1159 | /* Set capability bits for _OSC under processor scope */ |
1160 | acpi_early_processor_osc(); | |
1161 | ||
fc54ab72 LM |
1162 | /* |
1163 | * _OSC method may exist in module level code, | |
1164 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1165 | */ | |
1166 | acpi_bus_osc_support(); | |
1167 | ||
b1d248d9 ZR |
1168 | /* |
1169 | * _PDC control method may load dynamic SSDT tables, | |
1170 | * and we need to install the table handler before that. | |
1171 | */ | |
68bdb677 OP |
1172 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1173 | ||
b1d248d9 ZR |
1174 | acpi_sysfs_init(); |
1175 | ||
78f16996 AC |
1176 | acpi_early_processor_set_pdc(); |
1177 | ||
455c8793 ZY |
1178 | /* |
1179 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1180 | * is necessary to enable it as early as possible. | |
1181 | */ | |
dcf15cbd | 1182 | acpi_ec_dsdt_probe(); |
455c8793 | 1183 | |
1da177e4 LT |
1184 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1185 | ||
aafbcd16 AS |
1186 | /* Initialize sleep structures */ |
1187 | acpi_sleep_init(); | |
1188 | ||
1da177e4 LT |
1189 | /* |
1190 | * Get the system interrupt model and evaluate \_PIC. | |
1191 | */ | |
1192 | result = acpi_bus_init_irq(); | |
1193 | if (result) | |
1194 | goto error1; | |
1195 | ||
1196 | /* | |
1197 | * Register the for all standard device notifications. | |
1198 | */ | |
4be44fcd LB |
1199 | status = |
1200 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1201 | &acpi_bus_notify, NULL); | |
1da177e4 | 1202 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1203 | printk(KERN_ERR PREFIX |
1204 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1205 | goto error1; |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * Create the top ACPI proc directory | |
1210 | */ | |
1211 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1212 | ||
1dcc3d33 RW |
1213 | result = bus_register(&acpi_bus_type); |
1214 | if (!result) | |
1215 | return 0; | |
1da177e4 LT |
1216 | |
1217 | /* Mimic structured exception handling */ | |
4be44fcd | 1218 | error1: |
1da177e4 | 1219 | acpi_terminate(); |
d550d98d | 1220 | return -ENODEV; |
1da177e4 LT |
1221 | } |
1222 | ||
99e0d2fc | 1223 | struct kobject *acpi_kobj; |
f2d4753f | 1224 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1225 | |
4be44fcd | 1226 | static int __init acpi_init(void) |
1da177e4 | 1227 | { |
6831c6ed | 1228 | int result; |
1da177e4 | 1229 | |
1da177e4 LT |
1230 | if (acpi_disabled) { |
1231 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1232 | return -ENODEV; |
1da177e4 LT |
1233 | } |
1234 | ||
f62ed9e3 | 1235 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1236 | if (!acpi_kobj) { |
96b2dd1f | 1237 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1238 | acpi_kobj = NULL; |
1239 | } | |
1da177e4 | 1240 | |
0e46517d | 1241 | init_acpi_device_notify(); |
1da177e4 | 1242 | result = acpi_bus_init(); |
6831c6ed | 1243 | if (result) { |
1da177e4 | 1244 | disable_acpi(); |
81d0273d | 1245 | return result; |
6831c6ed | 1246 | } |
81d0273d | 1247 | |
6831c6ed | 1248 | pci_mmcfg_late_init(); |
88ef16d8 | 1249 | acpi_iort_init(); |
e747f274 | 1250 | acpi_scan_init(); |
a5f820fe | 1251 | acpi_ec_init(); |
a25ee920 | 1252 | acpi_debugfs_init(); |
9cee43e0 | 1253 | acpi_sleep_proc_init(); |
201b8c65 | 1254 | acpi_wakeup_device_init(); |
836d0830 | 1255 | acpi_debugger_init(); |
baa0c019 | 1256 | acpi_setup_sb_notify_handler(); |
6831c6ed | 1257 | return 0; |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | subsys_initcall(acpi_init); |