Commit | Line | Data |
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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> | |
5d128fbd | 38 | #include <linux/dmi.h> |
1da177e4 | 39 | #endif |
88ef16d8 | 40 | #include <linux/acpi_iort.h> |
7752d5cf | 41 | #include <linux/pci.h> |
eccddd32 | 42 | #include <acpi/apei.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 | 69 | |
ae976358 | 70 | static const struct dmi_system_id dsdt_dmi_table[] __initconst = { |
aa2110cb | 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 | 85 | #endif |
aa2110cb | 86 | |
1da177e4 LT |
87 | /* -------------------------------------------------------------------------- |
88 | Device Management | |
89 | -------------------------------------------------------------------------- */ | |
90 | ||
402ac536 BH |
91 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
92 | unsigned long long *sta) | |
1da177e4 | 93 | { |
402ac536 | 94 | acpi_status status; |
4be44fcd | 95 | |
402ac536 BH |
96 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
97 | if (ACPI_SUCCESS(status)) | |
98 | return AE_OK; | |
1da177e4 | 99 | |
402ac536 BH |
100 | if (status == AE_NOT_FOUND) { |
101 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
102 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
103 | return AE_OK; | |
1da177e4 | 104 | } |
402ac536 BH |
105 | return status; |
106 | } | |
5a98231f | 107 | EXPORT_SYMBOL_GPL(acpi_bus_get_status_handle); |
1da177e4 | 108 | |
402ac536 BH |
109 | int acpi_bus_get_status(struct acpi_device *device) |
110 | { | |
111 | acpi_status status; | |
112 | unsigned long long sta; | |
113 | ||
b7ecf663 HG |
114 | if (acpi_device_always_present(device)) { |
115 | acpi_set_device_status(device, ACPI_STA_DEFAULT); | |
116 | return 0; | |
117 | } | |
118 | ||
54ddce70 HG |
119 | /* Battery devices must have their deps met before calling _STA */ |
120 | if (acpi_device_is_battery(device) && device->dep_unmet) { | |
121 | acpi_set_device_status(device, 0); | |
122 | return 0; | |
123 | } | |
124 | ||
402ac536 BH |
125 | status = acpi_bus_get_status_handle(device->handle, &sta); |
126 | if (ACPI_FAILURE(status)) | |
127 | return -ENODEV; | |
128 | ||
25db115b | 129 | acpi_set_device_status(device, sta); |
1da177e4 LT |
130 | |
131 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
132 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
133 | "functional but not present;\n", | |
25db115b | 134 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
135 | } |
136 | ||
4be44fcd | 137 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 138 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 139 | return 0; |
1da177e4 | 140 | } |
4be44fcd | 141 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 142 | |
20733939 | 143 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 144 | void *context) |
20733939 ZR |
145 | { |
146 | return; | |
147 | } | |
148 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
149 | ||
72013795 LT |
150 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
151 | { | |
152 | acpi_status status; | |
153 | ||
154 | status = acpi_attach_data(handle, | |
155 | acpi_bus_private_data_handler, data); | |
156 | if (ACPI_FAILURE(status)) { | |
157 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
158 | return -ENODEV; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
164 | ||
20733939 ZR |
165 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
166 | { | |
6a8c0af6 | 167 | acpi_status status; |
20733939 ZR |
168 | |
169 | if (!*data) | |
170 | return -EINVAL; | |
171 | ||
172 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
173 | if (ACPI_FAILURE(status)) { |
174 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
175 | return -ENODEV; |
176 | } | |
177 | ||
178 | return 0; | |
179 | } | |
72013795 LT |
180 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
181 | ||
182 | void acpi_bus_detach_private_data(acpi_handle handle) | |
183 | { | |
184 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
185 | } | |
186 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 187 | |
70023de8 | 188 | static void acpi_print_osc_error(acpi_handle handle, |
f26f5c8b | 189 | struct acpi_osc_context *context, char *error) |
70023de8 | 190 | { |
70023de8 SL |
191 | int i; |
192 | ||
f26f5c8b RW |
193 | acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); |
194 | ||
195 | pr_debug("_OSC request data:"); | |
70023de8 | 196 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
f26f5c8b RW |
197 | pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); |
198 | ||
199 | pr_debug("\n"); | |
70023de8 SL |
200 | } |
201 | ||
70023de8 SL |
202 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) |
203 | { | |
204 | acpi_status status; | |
205 | struct acpi_object_list input; | |
206 | union acpi_object in_params[4]; | |
207 | union acpi_object *out_obj; | |
dfcaad8f | 208 | guid_t guid; |
70023de8 | 209 | u32 errors; |
9dc130fc | 210 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
211 | |
212 | if (!context) | |
213 | return AE_ERROR; | |
dfcaad8f | 214 | if (guid_parse(context->uuid_str, &guid)) |
70023de8 SL |
215 | return AE_ERROR; |
216 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
217 | context->ret.pointer = NULL; | |
218 | ||
219 | /* Setting up input parameters */ | |
220 | input.count = 4; | |
221 | input.pointer = in_params; | |
222 | in_params[0].type = ACPI_TYPE_BUFFER; | |
223 | in_params[0].buffer.length = 16; | |
dfcaad8f | 224 | in_params[0].buffer.pointer = (u8 *)&guid; |
70023de8 SL |
225 | in_params[1].type = ACPI_TYPE_INTEGER; |
226 | in_params[1].integer.value = context->rev; | |
227 | in_params[2].type = ACPI_TYPE_INTEGER; | |
228 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
229 | in_params[3].type = ACPI_TYPE_BUFFER; | |
230 | in_params[3].buffer.length = context->cap.length; | |
231 | in_params[3].buffer.pointer = context->cap.pointer; | |
232 | ||
9dc130fc | 233 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
234 | if (ACPI_FAILURE(status)) |
235 | return status; | |
236 | ||
9dc130fc | 237 | if (!output.length) |
70023de8 SL |
238 | return AE_NULL_OBJECT; |
239 | ||
9dc130fc SL |
240 | out_obj = output.pointer; |
241 | if (out_obj->type != ACPI_TYPE_BUFFER | |
242 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
243 | acpi_print_osc_error(handle, context, |
244 | "_OSC evaluation returned wrong type"); | |
245 | status = AE_TYPE; | |
246 | goto out_kfree; | |
247 | } | |
248 | /* Need to ignore the bit0 in result code */ | |
249 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
250 | if (errors) { | |
251 | if (errors & OSC_REQUEST_ERROR) | |
252 | acpi_print_osc_error(handle, context, | |
253 | "_OSC request failed"); | |
254 | if (errors & OSC_INVALID_UUID_ERROR) | |
255 | acpi_print_osc_error(handle, context, | |
256 | "_OSC invalid UUID"); | |
257 | if (errors & OSC_INVALID_REVISION_ERROR) | |
258 | acpi_print_osc_error(handle, context, | |
259 | "_OSC invalid revision"); | |
260 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 261 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
262 | & OSC_QUERY_ENABLE) |
263 | goto out_success; | |
264 | status = AE_SUPPORT; | |
265 | goto out_kfree; | |
266 | } | |
267 | status = AE_ERROR; | |
268 | goto out_kfree; | |
269 | } | |
270 | out_success: | |
9dc130fc | 271 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
272 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
273 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
274 | if (!context->ret.pointer) { |
275 | status = AE_NO_MEMORY; | |
276 | goto out_kfree; | |
277 | } | |
9dc130fc | 278 | status = AE_OK; |
70023de8 SL |
279 | |
280 | out_kfree: | |
9dc130fc SL |
281 | kfree(output.pointer); |
282 | if (status != AE_OK) | |
283 | context->ret.pointer = NULL; | |
70023de8 SL |
284 | return status; |
285 | } | |
286 | EXPORT_SYMBOL(acpi_run_osc); | |
287 | ||
eccddd32 | 288 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
289 | |
290 | /* | |
291 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
292 | * OSPM supports platform coordinated low power idle(LPI) states | |
293 | */ | |
294 | bool osc_pc_lpi_support_confirmed; | |
295 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
296 | ||
3563ff96 SL |
297 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
298 | static void acpi_bus_osc_support(void) | |
299 | { | |
300 | u32 capbuf[2]; | |
301 | struct acpi_osc_context context = { | |
302 | .uuid_str = sb_uuid_str, | |
303 | .rev = 1, | |
304 | .cap.length = 8, | |
305 | .cap.pointer = capbuf, | |
306 | }; | |
307 | acpi_handle handle; | |
308 | ||
b938a229 BH |
309 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
310 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
311 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
312 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
313 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
314 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 315 | |
b938a229 | 316 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 317 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
c2f4191a | 318 | |
5c2832e9 SP |
319 | #ifdef CONFIG_X86 |
320 | if (boot_cpu_has(X86_FEATURE_HWP)) { | |
321 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
322 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
323 | } | |
324 | #endif | |
325 | ||
de966cf4 | 326 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
327 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
328 | ||
eccddd32 | 329 | if (!ghes_disable) |
b938a229 | 330 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
331 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
332 | return; | |
eccddd32 HY |
333 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
334 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 335 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 336 | osc_sb_apei_support_acked = |
b938a229 | 337 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
338 | osc_pc_lpi_support_confirmed = |
339 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
340 | } | |
3563ff96 | 341 | kfree(context.ret.pointer); |
eccddd32 HY |
342 | } |
343 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
344 | } |
345 | ||
1da177e4 LT |
346 | /* -------------------------------------------------------------------------- |
347 | Notification Handling | |
348 | -------------------------------------------------------------------------- */ | |
349 | ||
1da177e4 LT |
350 | /** |
351 | * acpi_bus_notify | |
352 | * --------------- | |
353 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
354 | */ | |
4be44fcd | 355 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 356 | { |
1a699476 | 357 | struct acpi_device *adev; |
6d278131 | 358 | struct acpi_driver *driver; |
1a699476 | 359 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 360 | bool hotplug_event = false; |
02c37bd8 | 361 | |
1da177e4 | 362 | switch (type) { |
1da177e4 | 363 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 364 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 365 | hotplug_event = true; |
1da177e4 LT |
366 | break; |
367 | ||
368 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 369 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 370 | hotplug_event = true; |
1da177e4 LT |
371 | break; |
372 | ||
373 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 374 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
375 | break; |
376 | ||
377 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 378 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 379 | hotplug_event = true; |
1da177e4 LT |
380 | break; |
381 | ||
382 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 383 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
384 | /* TBD: Exactly what does 'light' mean? */ |
385 | break; | |
386 | ||
387 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
388 | acpi_handle_err(handle, "Device cannot be configured due " |
389 | "to a frequency mismatch\n"); | |
1da177e4 LT |
390 | break; |
391 | ||
392 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
393 | acpi_handle_err(handle, "Device cannot be configured due " |
394 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
395 | break; |
396 | ||
397 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 398 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
399 | break; |
400 | ||
401 | default: | |
f66abe92 RW |
402 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
403 | break; | |
1da177e4 LT |
404 | } |
405 | ||
1a699476 RW |
406 | adev = acpi_bus_get_acpi_device(handle); |
407 | if (!adev) | |
408 | goto err; | |
78ea4639 | 409 | |
1a699476 RW |
410 | driver = adev->driver; |
411 | if (driver && driver->ops.notify && | |
412 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
413 | driver->ops.notify(adev, type); | |
414 | ||
9a4d8d60 LCY |
415 | if (!hotplug_event) { |
416 | acpi_bus_put_acpi_device(adev); | |
417 | return; | |
418 | } | |
419 | ||
420 | if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) | |
d0103387 RW |
421 | return; |
422 | ||
1a699476 | 423 | acpi_bus_put_acpi_device(adev); |
1a699476 RW |
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. | |
4222f38c | 632 | * @of_id: OF ID if matched |
68c6b148 RW |
633 | * |
634 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
635 | * identifiers and a _DSD object with the "compatible" property, use that | |
636 | * property to match against the given list of identifiers. | |
637 | */ | |
638 | static bool acpi_of_match_device(struct acpi_device *adev, | |
4222f38c AS |
639 | const struct of_device_id *of_match_table, |
640 | const struct of_device_id **of_id) | |
68c6b148 RW |
641 | { |
642 | const union acpi_object *of_compatible, *obj; | |
643 | int i, nval; | |
644 | ||
645 | if (!adev) | |
646 | return false; | |
647 | ||
648 | of_compatible = adev->data.of_compatible; | |
649 | if (!of_match_table || !of_compatible) | |
650 | return false; | |
651 | ||
652 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
653 | nval = of_compatible->package.count; | |
654 | obj = of_compatible->package.elements; | |
655 | } else { /* Must be ACPI_TYPE_STRING. */ | |
656 | nval = 1; | |
657 | obj = of_compatible; | |
658 | } | |
659 | /* Now we can look for the driver DT compatible strings */ | |
660 | for (i = 0; i < nval; i++, obj++) { | |
661 | const struct of_device_id *id; | |
662 | ||
663 | for (id = of_match_table; id->compatible[0]; id++) | |
4222f38c AS |
664 | if (!strcasecmp(obj->string.pointer, id->compatible)) { |
665 | if (of_id) | |
666 | *of_id = id; | |
68c6b148 | 667 | return true; |
4222f38c | 668 | } |
68c6b148 RW |
669 | } |
670 | ||
671 | return false; | |
672 | } | |
673 | ||
51ede5d9 DD |
674 | static bool acpi_of_modalias(struct acpi_device *adev, |
675 | char *modalias, size_t len) | |
676 | { | |
677 | const union acpi_object *of_compatible; | |
678 | const union acpi_object *obj; | |
679 | const char *str, *chr; | |
680 | ||
681 | of_compatible = adev->data.of_compatible; | |
682 | if (!of_compatible) | |
683 | return false; | |
684 | ||
685 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
686 | obj = of_compatible->package.elements; | |
687 | else /* Must be ACPI_TYPE_STRING. */ | |
688 | obj = of_compatible; | |
689 | ||
690 | str = obj->string.pointer; | |
691 | chr = strchr(str, ','); | |
692 | strlcpy(modalias, chr ? chr + 1 : str, len); | |
693 | ||
694 | return true; | |
695 | } | |
696 | ||
697 | /** | |
698 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
699 | * @adev: ACPI device object to match | |
700 | * @default_id: ID string to use as default if no compatible string found | |
701 | * @modalias: Pointer to buffer that modalias value will be copied into | |
702 | * @len: Length of modalias buffer | |
703 | * | |
704 | * This is a counterpart of of_modalias_node() for struct acpi_device objects. | |
705 | * If there is a compatible string for @adev, it will be copied to @modalias | |
706 | * with the vendor prefix stripped; otherwise, @default_id will be used. | |
707 | */ | |
708 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
709 | char *modalias, size_t len) | |
710 | { | |
711 | if (!acpi_of_modalias(adev, modalias, len)) | |
712 | strlcpy(modalias, default_id, len); | |
713 | } | |
714 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
715 | ||
68c6b148 RW |
716 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
717 | struct acpi_hardware_id *hwid) | |
718 | { | |
719 | int i, msk, byte_shift; | |
720 | char buf[3]; | |
721 | ||
722 | if (!id->cls) | |
723 | return false; | |
724 | ||
725 | /* Apply class-code bitmask, before checking each class-code byte */ | |
726 | for (i = 1; i <= 3; i++) { | |
727 | byte_shift = 8 * (3 - i); | |
728 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
729 | if (!msk) | |
730 | continue; | |
731 | ||
732 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
733 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
734 | return false; | |
735 | } | |
736 | return true; | |
737 | } | |
738 | ||
4222f38c AS |
739 | static bool __acpi_match_device(struct acpi_device *device, |
740 | const struct acpi_device_id *acpi_ids, | |
741 | const struct of_device_id *of_ids, | |
742 | const struct acpi_device_id **acpi_id, | |
743 | const struct of_device_id **of_id) | |
68c6b148 RW |
744 | { |
745 | const struct acpi_device_id *id; | |
746 | struct acpi_hardware_id *hwid; | |
747 | ||
748 | /* | |
749 | * If the device is not present, it is unnecessary to load device | |
750 | * driver for it. | |
751 | */ | |
752 | if (!device || !device->status.present) | |
4222f38c | 753 | return false; |
68c6b148 RW |
754 | |
755 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
756 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
4222f38c AS |
757 | if (acpi_ids) { |
758 | for (id = acpi_ids; id->id[0] || id->cls; id++) { | |
759 | if (id->id[0] && !strcmp((char *)id->id, hwid->id)) | |
760 | goto out_acpi_match; | |
761 | if (id->cls && __acpi_match_device_cls(id, hwid)) | |
762 | goto out_acpi_match; | |
763 | } | |
68c6b148 RW |
764 | } |
765 | ||
766 | /* | |
767 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
768 | * "compatible" property if found. | |
68c6b148 | 769 | */ |
4222f38c AS |
770 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)) |
771 | return acpi_of_match_device(device, of_ids, of_id); | |
68c6b148 | 772 | } |
4222f38c AS |
773 | return false; |
774 | ||
775 | out_acpi_match: | |
776 | if (acpi_id) | |
777 | *acpi_id = id; | |
778 | return true; | |
68c6b148 RW |
779 | } |
780 | ||
781 | /** | |
782 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
783 | * @ids: Array of struct acpi_device_id object to match against. | |
784 | * @dev: The device structure to match. | |
785 | * | |
786 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
787 | * object for that handle and use that object to match against a given list of | |
788 | * device IDs. | |
789 | * | |
790 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
791 | */ | |
792 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
793 | const struct device *dev) | |
794 | { | |
4222f38c AS |
795 | const struct acpi_device_id *id = NULL; |
796 | ||
797 | __acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL); | |
798 | return id; | |
68c6b148 RW |
799 | } |
800 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
801 | ||
67dcc26d | 802 | const void *acpi_device_get_match_data(const struct device *dev) |
80212a16 SK |
803 | { |
804 | const struct acpi_device_id *match; | |
805 | ||
80212a16 SK |
806 | match = acpi_match_device(dev->driver->acpi_match_table, dev); |
807 | if (!match) | |
808 | return NULL; | |
809 | ||
67dcc26d | 810 | return (const void *)match->driver_data; |
80212a16 | 811 | } |
29d5325a | 812 | EXPORT_SYMBOL_GPL(acpi_device_get_match_data); |
80212a16 | 813 | |
68c6b148 RW |
814 | int acpi_match_device_ids(struct acpi_device *device, |
815 | const struct acpi_device_id *ids) | |
816 | { | |
4222f38c | 817 | return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT; |
68c6b148 RW |
818 | } |
819 | EXPORT_SYMBOL(acpi_match_device_ids); | |
820 | ||
821 | bool acpi_driver_match_device(struct device *dev, | |
822 | const struct device_driver *drv) | |
823 | { | |
824 | if (!drv->acpi_match_table) | |
825 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
4222f38c AS |
826 | drv->of_match_table, |
827 | NULL); | |
68c6b148 | 828 | |
4222f38c AS |
829 | return __acpi_match_device(acpi_companion_match(dev), |
830 | drv->acpi_match_table, drv->of_match_table, | |
831 | NULL, NULL); | |
68c6b148 RW |
832 | } |
833 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
834 | ||
5894b0c4 RW |
835 | /* -------------------------------------------------------------------------- |
836 | ACPI Driver Management | |
837 | -------------------------------------------------------------------------- */ | |
838 | ||
839 | /** | |
840 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
841 | * @driver: driver being registered | |
842 | * | |
843 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
844 | * devices that match the driver's criteria and binds. Returns zero for | |
845 | * success or a negative error status for failure. | |
846 | */ | |
847 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
848 | { | |
849 | int ret; | |
850 | ||
851 | if (acpi_disabled) | |
852 | return -ENODEV; | |
853 | driver->drv.name = driver->name; | |
854 | driver->drv.bus = &acpi_bus_type; | |
855 | driver->drv.owner = driver->owner; | |
856 | ||
857 | ret = driver_register(&driver->drv); | |
858 | return ret; | |
859 | } | |
860 | ||
861 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
862 | ||
863 | /** | |
864 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
865 | * @driver: driver to unregister | |
866 | * | |
867 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
868 | * devices that match the driver's criteria and unbinds. | |
869 | */ | |
870 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
871 | { | |
872 | driver_unregister(&driver->drv); | |
873 | } | |
874 | ||
875 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
876 | ||
877 | /* -------------------------------------------------------------------------- | |
878 | ACPI Bus operations | |
879 | -------------------------------------------------------------------------- */ | |
880 | ||
881 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
882 | { | |
883 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
884 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
885 | ||
886 | return acpi_dev->flags.match_driver | |
887 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
888 | } | |
889 | ||
890 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
891 | { | |
892 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
893 | } | |
894 | ||
895 | static int acpi_device_probe(struct device *dev) | |
896 | { | |
897 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
898 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
899 | int ret; | |
900 | ||
901 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
902 | return -EINVAL; | |
903 | ||
904 | if (!acpi_drv->ops.add) | |
905 | return -ENOSYS; | |
906 | ||
907 | ret = acpi_drv->ops.add(acpi_dev); | |
908 | if (ret) | |
909 | return ret; | |
910 | ||
911 | acpi_dev->driver = acpi_drv; | |
912 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
913 | "Driver [%s] successfully bound to device [%s]\n", | |
914 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
915 | ||
916 | if (acpi_drv->ops.notify) { | |
917 | ret = acpi_device_install_notify_handler(acpi_dev); | |
918 | if (ret) { | |
919 | if (acpi_drv->ops.remove) | |
920 | acpi_drv->ops.remove(acpi_dev); | |
921 | ||
922 | acpi_dev->driver = NULL; | |
923 | acpi_dev->driver_data = NULL; | |
924 | return ret; | |
925 | } | |
926 | } | |
927 | ||
928 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
929 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
930 | get_device(dev); | |
931 | return 0; | |
932 | } | |
933 | ||
67fbd0a3 | 934 | static int acpi_device_remove(struct device *dev) |
5894b0c4 RW |
935 | { |
936 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
937 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
938 | ||
939 | if (acpi_drv) { | |
940 | if (acpi_drv->ops.notify) | |
941 | acpi_device_remove_notify_handler(acpi_dev); | |
942 | if (acpi_drv->ops.remove) | |
943 | acpi_drv->ops.remove(acpi_dev); | |
944 | } | |
945 | acpi_dev->driver = NULL; | |
946 | acpi_dev->driver_data = NULL; | |
947 | ||
948 | put_device(dev); | |
949 | return 0; | |
950 | } | |
951 | ||
952 | struct bus_type acpi_bus_type = { | |
953 | .name = "acpi", | |
954 | .match = acpi_bus_match, | |
955 | .probe = acpi_device_probe, | |
956 | .remove = acpi_device_remove, | |
957 | .uevent = acpi_device_uevent, | |
958 | }; | |
959 | ||
1da177e4 LT |
960 | /* -------------------------------------------------------------------------- |
961 | Initialization/Cleanup | |
962 | -------------------------------------------------------------------------- */ | |
963 | ||
4be44fcd | 964 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 965 | { |
6a8c0af6 | 966 | acpi_status status; |
4be44fcd | 967 | char *message = NULL; |
1da177e4 | 968 | |
1da177e4 | 969 | |
aafbcd16 | 970 | /* |
1da177e4 LT |
971 | * Let the system know what interrupt model we are using by |
972 | * evaluating the \_PIC object, if exists. | |
973 | */ | |
974 | ||
975 | switch (acpi_irq_model) { | |
976 | case ACPI_IRQ_MODEL_PIC: | |
977 | message = "PIC"; | |
978 | break; | |
979 | case ACPI_IRQ_MODEL_IOAPIC: | |
980 | message = "IOAPIC"; | |
981 | break; | |
982 | case ACPI_IRQ_MODEL_IOSAPIC: | |
983 | message = "IOSAPIC"; | |
984 | break; | |
fbe61ec7 HG |
985 | case ACPI_IRQ_MODEL_GIC: |
986 | message = "GIC"; | |
987 | break; | |
3948ec94 JK |
988 | case ACPI_IRQ_MODEL_PLATFORM: |
989 | message = "platform specific model"; | |
990 | break; | |
1da177e4 LT |
991 | default: |
992 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 993 | return -ENODEV; |
1da177e4 LT |
994 | } |
995 | ||
996 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
997 | ||
0db98202 | 998 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 999 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 1000 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 1001 | return -ENODEV; |
1da177e4 LT |
1002 | } |
1003 | ||
d550d98d | 1004 | return 0; |
1da177e4 LT |
1005 | } |
1006 | ||
b064a8fa RW |
1007 | /** |
1008 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1009 | * | |
1010 | * The ACPI tables are accessible after this, but the handling of events has not | |
1011 | * been initialized and the global lock is not available yet, so AML should not | |
1012 | * be executed at this point. | |
1013 | * | |
1014 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1015 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1016 | */ | |
4be44fcd | 1017 | void __init acpi_early_init(void) |
1da177e4 | 1018 | { |
6a8c0af6 | 1019 | acpi_status status; |
1da177e4 LT |
1020 | |
1021 | if (acpi_disabled) | |
d550d98d | 1022 | return; |
1da177e4 | 1023 | |
61686124 BM |
1024 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
1025 | ||
1da177e4 LT |
1026 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1027 | if (!acpi_strict) | |
1028 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1029 | ||
8d3523fb | 1030 | acpi_permanent_mmap = true; |
ad71860a | 1031 | |
5d128fbd | 1032 | #ifdef CONFIG_X86 |
ae976358 KHF |
1033 | /* |
1034 | * If the machine falls into the DMI check table, | |
5d128fbd JD |
1035 | * DSDT will be copied to memory. |
1036 | * Note that calling dmi_check_system() here on other architectures | |
1037 | * would not be OK because only x86 initializes dmi early enough. | |
1038 | * Thankfully only x86 systems need such quirks for now. | |
ae976358 KHF |
1039 | */ |
1040 | dmi_check_system(dsdt_dmi_table); | |
5d128fbd | 1041 | #endif |
aa2110cb | 1042 | |
ad71860a AS |
1043 | status = acpi_reallocate_root_table(); |
1044 | if (ACPI_FAILURE(status)) { | |
1045 | printk(KERN_ERR PREFIX | |
1046 | "Unable to reallocate ACPI tables\n"); | |
1047 | goto error0; | |
1048 | } | |
1049 | ||
1da177e4 LT |
1050 | status = acpi_initialize_subsystem(); |
1051 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
1052 | printk(KERN_ERR PREFIX |
1053 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
1054 | goto error0; |
1055 | } | |
1056 | ||
1da177e4 LT |
1057 | #ifdef CONFIG_X86 |
1058 | if (!acpi_ioapic) { | |
1da177e4 | 1059 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1060 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1061 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1062 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1063 | } | |
1da177e4 | 1064 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1065 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1066 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1067 | } else { |
1da177e4 | 1068 | /* |
cee324b1 | 1069 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1070 | * update it with result from INT_SRC_OVR parsing |
1071 | */ | |
cee324b1 | 1072 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1073 | } |
1074 | #endif | |
b064a8fa RW |
1075 | return; |
1076 | ||
1077 | error0: | |
1078 | disable_acpi(); | |
1079 | } | |
1080 | ||
1081 | /** | |
1082 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1083 | * | |
3af03f77 | 1084 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1085 | * |
1086 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1087 | * done before all things that really depend on ACPI. The right spot appears to | |
1088 | * be before finalizing the EFI initialization. | |
1089 | */ | |
1090 | void __init acpi_subsystem_init(void) | |
1091 | { | |
1092 | acpi_status status; | |
1093 | ||
1094 | if (acpi_disabled) | |
1095 | return; | |
1da177e4 | 1096 | |
4505a201 | 1097 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
1098 | if (ACPI_FAILURE(status)) { |
1099 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
1100 | disable_acpi(); |
1101 | } else { | |
1102 | /* | |
1103 | * If the system is using ACPI then we can be reasonably | |
1104 | * confident that any regulators are managed by the firmware | |
1105 | * so tell the regulator core it has everything it needs to | |
1106 | * know. | |
1107 | */ | |
1108 | regulator_has_full_constraints(); | |
1da177e4 | 1109 | } |
1da177e4 LT |
1110 | } |
1111 | ||
68bdb677 OP |
1112 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1113 | { | |
1114 | acpi_scan_table_handler(event, table, context); | |
1115 | ||
1116 | return acpi_sysfs_table_handler(event, table, context); | |
1117 | } | |
1118 | ||
4be44fcd | 1119 | static int __init acpi_bus_init(void) |
1da177e4 | 1120 | { |
6a8c0af6 BH |
1121 | int result; |
1122 | acpi_status status; | |
1da177e4 | 1123 | |
176f9c18 | 1124 | acpi_os_initialize1(); |
1da177e4 | 1125 | |
d737f333 ES |
1126 | status = acpi_load_tables(); |
1127 | if (ACPI_FAILURE(status)) { | |
1128 | printk(KERN_ERR PREFIX | |
1129 | "Unable to load the System Description Tables\n"); | |
1130 | goto error1; | |
fe6cbea0 LZ |
1131 | } |
1132 | ||
b1c03308 RW |
1133 | /* |
1134 | * ACPI 2.0 requires the EC driver to be loaded and work before the EC | |
1135 | * device is found in the namespace. | |
1136 | * | |
1137 | * This is accomplished by looking for the ECDT table and getting the EC | |
1138 | * parameters out of that. | |
1139 | * | |
1140 | * Do that before calling acpi_initialize_objects() which may trigger EC | |
1141 | * address space accesses. | |
1142 | */ | |
1143 | acpi_ec_ecdt_probe(); | |
1144 | ||
fe6cbea0 LZ |
1145 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1146 | if (ACPI_FAILURE(status)) { | |
1147 | printk(KERN_ERR PREFIX | |
1148 | "Unable to start the ACPI Interpreter\n"); | |
1149 | goto error1; | |
1150 | } | |
1151 | ||
1da177e4 LT |
1152 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1153 | if (ACPI_FAILURE(status)) { | |
1154 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1155 | goto error1; | |
1156 | } | |
1157 | ||
a2121167 SP |
1158 | /* Set capability bits for _OSC under processor scope */ |
1159 | acpi_early_processor_osc(); | |
1160 | ||
fc54ab72 LM |
1161 | /* |
1162 | * _OSC method may exist in module level code, | |
1163 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1164 | */ | |
1165 | acpi_bus_osc_support(); | |
1166 | ||
b1d248d9 ZR |
1167 | /* |
1168 | * _PDC control method may load dynamic SSDT tables, | |
1169 | * and we need to install the table handler before that. | |
1170 | */ | |
68bdb677 OP |
1171 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1172 | ||
b1d248d9 ZR |
1173 | acpi_sysfs_init(); |
1174 | ||
78f16996 AC |
1175 | acpi_early_processor_set_pdc(); |
1176 | ||
455c8793 ZY |
1177 | /* |
1178 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1179 | * is necessary to enable it as early as possible. | |
1180 | */ | |
dcf15cbd | 1181 | acpi_ec_dsdt_probe(); |
455c8793 | 1182 | |
1da177e4 LT |
1183 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1184 | ||
aafbcd16 AS |
1185 | /* Initialize sleep structures */ |
1186 | acpi_sleep_init(); | |
1187 | ||
1da177e4 LT |
1188 | /* |
1189 | * Get the system interrupt model and evaluate \_PIC. | |
1190 | */ | |
1191 | result = acpi_bus_init_irq(); | |
1192 | if (result) | |
1193 | goto error1; | |
1194 | ||
1195 | /* | |
1196 | * Register the for all standard device notifications. | |
1197 | */ | |
4be44fcd LB |
1198 | status = |
1199 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1200 | &acpi_bus_notify, NULL); | |
1da177e4 | 1201 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1202 | printk(KERN_ERR PREFIX |
1203 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1204 | goto error1; |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * Create the top ACPI proc directory | |
1209 | */ | |
1210 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1211 | ||
1dcc3d33 RW |
1212 | result = bus_register(&acpi_bus_type); |
1213 | if (!result) | |
1214 | return 0; | |
1da177e4 LT |
1215 | |
1216 | /* Mimic structured exception handling */ | |
4be44fcd | 1217 | error1: |
1da177e4 | 1218 | acpi_terminate(); |
d550d98d | 1219 | return -ENODEV; |
1da177e4 LT |
1220 | } |
1221 | ||
99e0d2fc | 1222 | struct kobject *acpi_kobj; |
f2d4753f | 1223 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1224 | |
4be44fcd | 1225 | static int __init acpi_init(void) |
1da177e4 | 1226 | { |
6831c6ed | 1227 | int result; |
1da177e4 | 1228 | |
1da177e4 LT |
1229 | if (acpi_disabled) { |
1230 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1231 | return -ENODEV; |
1da177e4 LT |
1232 | } |
1233 | ||
f62ed9e3 | 1234 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1235 | if (!acpi_kobj) { |
96b2dd1f | 1236 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1237 | acpi_kobj = NULL; |
1238 | } | |
1da177e4 LT |
1239 | |
1240 | result = acpi_bus_init(); | |
6831c6ed | 1241 | if (result) { |
1da177e4 | 1242 | disable_acpi(); |
81d0273d | 1243 | return result; |
6831c6ed | 1244 | } |
81d0273d | 1245 | |
6831c6ed | 1246 | pci_mmcfg_late_init(); |
88ef16d8 | 1247 | acpi_iort_init(); |
e747f274 | 1248 | acpi_scan_init(); |
a5f820fe | 1249 | acpi_ec_init(); |
a25ee920 | 1250 | acpi_debugfs_init(); |
9cee43e0 | 1251 | acpi_sleep_proc_init(); |
201b8c65 | 1252 | acpi_wakeup_device_init(); |
836d0830 | 1253 | acpi_debugger_init(); |
baa0c019 | 1254 | acpi_setup_sb_notify_handler(); |
6831c6ed | 1255 | return 0; |
1da177e4 LT |
1256 | } |
1257 | ||
1258 | subsys_initcall(acpi_init); |