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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
4 | * | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
1da177e4 LT |
6 | */ |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/ioport.h> | |
d568df84 | 11 | #include <linux/kernel.h> |
1da177e4 LT |
12 | #include <linux/list.h> |
13 | #include <linux/sched.h> | |
14 | #include <linux/pm.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/proc_fs.h> | |
6697c052 | 17 | #include <linux/acpi.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
49a12877 | 19 | #include <linux/regulator/machine.h> |
baa0c019 PP |
20 | #include <linux/workqueue.h> |
21 | #include <linux/reboot.h> | |
22 | #include <linux/delay.h> | |
1da177e4 LT |
23 | #ifdef CONFIG_X86 |
24 | #include <asm/mpspec.h> | |
5d128fbd | 25 | #include <linux/dmi.h> |
1da177e4 | 26 | #endif |
88ef16d8 | 27 | #include <linux/acpi_iort.h> |
7752d5cf | 28 | #include <linux/pci.h> |
eccddd32 | 29 | #include <acpi/apei.h> |
cd51e61c | 30 | #include <linux/suspend.h> |
1da177e4 | 31 | |
e60cc7a6 BH |
32 | #include "internal.h" |
33 | ||
1da177e4 | 34 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 35 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 36 | |
4be44fcd LB |
37 | struct acpi_device *acpi_root; |
38 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
39 | EXPORT_SYMBOL(acpi_root_dir); |
40 | ||
cce4f632 | 41 | #ifdef CONFIG_X86 |
73577d1d LZ |
42 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
43 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
44 | { | |
45 | return 0; | |
46 | } | |
47 | #else | |
aa2110cb LM |
48 | static int set_copy_dsdt(const struct dmi_system_id *id) |
49 | { | |
50 | printk(KERN_NOTICE "%s detected - " | |
51 | "force copy of DSDT to local memory\n", id->ident); | |
52 | acpi_gbl_copy_dsdt_locally = 1; | |
53 | return 0; | |
54 | } | |
73577d1d | 55 | #endif |
aa2110cb | 56 | |
ae976358 | 57 | static const struct dmi_system_id dsdt_dmi_table[] __initconst = { |
aa2110cb | 58 | /* |
100cf877 | 59 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
60 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
61 | */ | |
62 | { | |
63 | .callback = set_copy_dsdt, | |
100cf877 | 64 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
65 | .matches = { |
66 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 67 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 68 | }, |
cce4f632 LM |
69 | }, |
70 | {} | |
aa2110cb | 71 | }; |
cce4f632 | 72 | #endif |
aa2110cb | 73 | |
1da177e4 LT |
74 | /* -------------------------------------------------------------------------- |
75 | Device Management | |
76 | -------------------------------------------------------------------------- */ | |
77 | ||
402ac536 BH |
78 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
79 | unsigned long long *sta) | |
1da177e4 | 80 | { |
402ac536 | 81 | acpi_status status; |
4be44fcd | 82 | |
402ac536 BH |
83 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
84 | if (ACPI_SUCCESS(status)) | |
85 | return AE_OK; | |
1da177e4 | 86 | |
402ac536 BH |
87 | if (status == AE_NOT_FOUND) { |
88 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
89 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
90 | return AE_OK; | |
1da177e4 | 91 | } |
402ac536 BH |
92 | return status; |
93 | } | |
5a98231f | 94 | EXPORT_SYMBOL_GPL(acpi_bus_get_status_handle); |
1da177e4 | 95 | |
402ac536 BH |
96 | int acpi_bus_get_status(struct acpi_device *device) |
97 | { | |
98 | acpi_status status; | |
99 | unsigned long long sta; | |
100 | ||
b7ecf663 HG |
101 | if (acpi_device_always_present(device)) { |
102 | acpi_set_device_status(device, ACPI_STA_DEFAULT); | |
103 | return 0; | |
104 | } | |
105 | ||
54ddce70 HG |
106 | /* Battery devices must have their deps met before calling _STA */ |
107 | if (acpi_device_is_battery(device) && device->dep_unmet) { | |
108 | acpi_set_device_status(device, 0); | |
109 | return 0; | |
110 | } | |
111 | ||
402ac536 BH |
112 | status = acpi_bus_get_status_handle(device->handle, &sta); |
113 | if (ACPI_FAILURE(status)) | |
114 | return -ENODEV; | |
115 | ||
25db115b | 116 | acpi_set_device_status(device, sta); |
1da177e4 LT |
117 | |
118 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
119 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
120 | "functional but not present;\n", | |
25db115b | 121 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
122 | } |
123 | ||
4be44fcd | 124 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 125 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 126 | return 0; |
1da177e4 | 127 | } |
4be44fcd | 128 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 129 | |
20733939 | 130 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 131 | void *context) |
20733939 ZR |
132 | { |
133 | return; | |
134 | } | |
135 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
136 | ||
72013795 LT |
137 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
138 | { | |
139 | acpi_status status; | |
140 | ||
141 | status = acpi_attach_data(handle, | |
142 | acpi_bus_private_data_handler, data); | |
143 | if (ACPI_FAILURE(status)) { | |
144 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
145 | return -ENODEV; | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
151 | ||
20733939 ZR |
152 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
153 | { | |
6a8c0af6 | 154 | acpi_status status; |
20733939 ZR |
155 | |
156 | if (!*data) | |
157 | return -EINVAL; | |
158 | ||
159 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
160 | if (ACPI_FAILURE(status)) { |
161 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
162 | return -ENODEV; |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
72013795 LT |
167 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
168 | ||
169 | void acpi_bus_detach_private_data(acpi_handle handle) | |
170 | { | |
171 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
172 | } | |
173 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 174 | |
70023de8 | 175 | static void acpi_print_osc_error(acpi_handle handle, |
f26f5c8b | 176 | struct acpi_osc_context *context, char *error) |
70023de8 | 177 | { |
70023de8 SL |
178 | int i; |
179 | ||
f26f5c8b RW |
180 | acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); |
181 | ||
182 | pr_debug("_OSC request data:"); | |
70023de8 | 183 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
f26f5c8b RW |
184 | pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); |
185 | ||
186 | pr_debug("\n"); | |
70023de8 SL |
187 | } |
188 | ||
70023de8 SL |
189 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) |
190 | { | |
191 | acpi_status status; | |
192 | struct acpi_object_list input; | |
193 | union acpi_object in_params[4]; | |
194 | union acpi_object *out_obj; | |
dfcaad8f | 195 | guid_t guid; |
70023de8 | 196 | u32 errors; |
9dc130fc | 197 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
198 | |
199 | if (!context) | |
200 | return AE_ERROR; | |
dfcaad8f | 201 | if (guid_parse(context->uuid_str, &guid)) |
70023de8 SL |
202 | return AE_ERROR; |
203 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
204 | context->ret.pointer = NULL; | |
205 | ||
206 | /* Setting up input parameters */ | |
207 | input.count = 4; | |
208 | input.pointer = in_params; | |
209 | in_params[0].type = ACPI_TYPE_BUFFER; | |
210 | in_params[0].buffer.length = 16; | |
dfcaad8f | 211 | in_params[0].buffer.pointer = (u8 *)&guid; |
70023de8 SL |
212 | in_params[1].type = ACPI_TYPE_INTEGER; |
213 | in_params[1].integer.value = context->rev; | |
214 | in_params[2].type = ACPI_TYPE_INTEGER; | |
215 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
216 | in_params[3].type = ACPI_TYPE_BUFFER; | |
217 | in_params[3].buffer.length = context->cap.length; | |
218 | in_params[3].buffer.pointer = context->cap.pointer; | |
219 | ||
9dc130fc | 220 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
221 | if (ACPI_FAILURE(status)) |
222 | return status; | |
223 | ||
9dc130fc | 224 | if (!output.length) |
70023de8 SL |
225 | return AE_NULL_OBJECT; |
226 | ||
9dc130fc SL |
227 | out_obj = output.pointer; |
228 | if (out_obj->type != ACPI_TYPE_BUFFER | |
229 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
230 | acpi_print_osc_error(handle, context, |
231 | "_OSC evaluation returned wrong type"); | |
232 | status = AE_TYPE; | |
233 | goto out_kfree; | |
234 | } | |
235 | /* Need to ignore the bit0 in result code */ | |
236 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
237 | if (errors) { | |
238 | if (errors & OSC_REQUEST_ERROR) | |
239 | acpi_print_osc_error(handle, context, | |
240 | "_OSC request failed"); | |
241 | if (errors & OSC_INVALID_UUID_ERROR) | |
242 | acpi_print_osc_error(handle, context, | |
243 | "_OSC invalid UUID"); | |
244 | if (errors & OSC_INVALID_REVISION_ERROR) | |
245 | acpi_print_osc_error(handle, context, | |
246 | "_OSC invalid revision"); | |
247 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 248 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
249 | & OSC_QUERY_ENABLE) |
250 | goto out_success; | |
251 | status = AE_SUPPORT; | |
252 | goto out_kfree; | |
253 | } | |
254 | status = AE_ERROR; | |
255 | goto out_kfree; | |
256 | } | |
257 | out_success: | |
9dc130fc | 258 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
259 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
260 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
261 | if (!context->ret.pointer) { |
262 | status = AE_NO_MEMORY; | |
263 | goto out_kfree; | |
264 | } | |
9dc130fc | 265 | status = AE_OK; |
70023de8 SL |
266 | |
267 | out_kfree: | |
9dc130fc SL |
268 | kfree(output.pointer); |
269 | if (status != AE_OK) | |
270 | context->ret.pointer = NULL; | |
70023de8 SL |
271 | return status; |
272 | } | |
273 | EXPORT_SYMBOL(acpi_run_osc); | |
274 | ||
eccddd32 | 275 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
276 | |
277 | /* | |
278 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
279 | * OSPM supports platform coordinated low power idle(LPI) states | |
280 | */ | |
281 | bool osc_pc_lpi_support_confirmed; | |
282 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
283 | ||
3563ff96 SL |
284 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
285 | static void acpi_bus_osc_support(void) | |
286 | { | |
287 | u32 capbuf[2]; | |
288 | struct acpi_osc_context context = { | |
289 | .uuid_str = sb_uuid_str, | |
290 | .rev = 1, | |
291 | .cap.length = 8, | |
292 | .cap.pointer = capbuf, | |
293 | }; | |
294 | acpi_handle handle; | |
295 | ||
b938a229 BH |
296 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
297 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
298 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
299 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
300 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
301 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 302 | |
b938a229 | 303 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 304 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
c2f4191a | 305 | |
5c2832e9 SP |
306 | #ifdef CONFIG_X86 |
307 | if (boot_cpu_has(X86_FEATURE_HWP)) { | |
308 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
309 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
310 | } | |
311 | #endif | |
312 | ||
de966cf4 | 313 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
314 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
315 | ||
eccddd32 | 316 | if (!ghes_disable) |
b938a229 | 317 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
318 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
319 | return; | |
eccddd32 HY |
320 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
321 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 322 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 323 | osc_sb_apei_support_acked = |
b938a229 | 324 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
325 | osc_pc_lpi_support_confirmed = |
326 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
327 | } | |
3563ff96 | 328 | kfree(context.ret.pointer); |
eccddd32 HY |
329 | } |
330 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
331 | } |
332 | ||
1da177e4 LT |
333 | /* -------------------------------------------------------------------------- |
334 | Notification Handling | |
335 | -------------------------------------------------------------------------- */ | |
336 | ||
1da177e4 LT |
337 | /** |
338 | * acpi_bus_notify | |
339 | * --------------- | |
340 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
341 | */ | |
4be44fcd | 342 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 343 | { |
1a699476 | 344 | struct acpi_device *adev; |
6d278131 | 345 | struct acpi_driver *driver; |
1a699476 | 346 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 347 | bool hotplug_event = false; |
02c37bd8 | 348 | |
1da177e4 | 349 | switch (type) { |
1da177e4 | 350 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 351 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 352 | hotplug_event = true; |
1da177e4 LT |
353 | break; |
354 | ||
355 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 356 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 357 | hotplug_event = true; |
1da177e4 LT |
358 | break; |
359 | ||
360 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 361 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
362 | break; |
363 | ||
364 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 365 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 366 | hotplug_event = true; |
1da177e4 LT |
367 | break; |
368 | ||
369 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 370 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
371 | /* TBD: Exactly what does 'light' mean? */ |
372 | break; | |
373 | ||
374 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
375 | acpi_handle_err(handle, "Device cannot be configured due " |
376 | "to a frequency mismatch\n"); | |
1da177e4 LT |
377 | break; |
378 | ||
379 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
380 | acpi_handle_err(handle, "Device cannot be configured due " |
381 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
382 | break; |
383 | ||
384 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 385 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
386 | break; |
387 | ||
388 | default: | |
f66abe92 RW |
389 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
390 | break; | |
1da177e4 LT |
391 | } |
392 | ||
1a699476 RW |
393 | adev = acpi_bus_get_acpi_device(handle); |
394 | if (!adev) | |
395 | goto err; | |
78ea4639 | 396 | |
1a699476 RW |
397 | driver = adev->driver; |
398 | if (driver && driver->ops.notify && | |
399 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
400 | driver->ops.notify(adev, type); | |
401 | ||
9a4d8d60 LCY |
402 | if (!hotplug_event) { |
403 | acpi_bus_put_acpi_device(adev); | |
404 | return; | |
405 | } | |
406 | ||
407 | if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) | |
d0103387 RW |
408 | return; |
409 | ||
1a699476 | 410 | acpi_bus_put_acpi_device(adev); |
1a699476 RW |
411 | |
412 | err: | |
700b8422 | 413 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
414 | } |
415 | ||
5894b0c4 RW |
416 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
417 | { | |
418 | struct acpi_device *device = data; | |
419 | ||
420 | device->driver->ops.notify(device, event); | |
421 | } | |
422 | ||
423 | static void acpi_device_notify_fixed(void *data) | |
424 | { | |
425 | struct acpi_device *device = data; | |
426 | ||
427 | /* Fixed hardware devices have no handles */ | |
428 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
429 | } | |
430 | ||
431 | static u32 acpi_device_fixed_event(void *data) | |
432 | { | |
433 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
434 | return ACPI_INTERRUPT_HANDLED; | |
435 | } | |
436 | ||
437 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
438 | { | |
439 | acpi_status status; | |
440 | ||
441 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
442 | status = | |
443 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
444 | acpi_device_fixed_event, | |
445 | device); | |
446 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
447 | status = | |
448 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
449 | acpi_device_fixed_event, | |
450 | device); | |
451 | else | |
452 | status = acpi_install_notify_handler(device->handle, | |
453 | ACPI_DEVICE_NOTIFY, | |
454 | acpi_device_notify, | |
455 | device); | |
456 | ||
457 | if (ACPI_FAILURE(status)) | |
458 | return -EINVAL; | |
459 | return 0; | |
460 | } | |
461 | ||
462 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
463 | { | |
464 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
465 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
466 | acpi_device_fixed_event); | |
467 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
468 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
469 | acpi_device_fixed_event); | |
470 | else | |
471 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
472 | acpi_device_notify); | |
473 | } | |
474 | ||
baa0c019 PP |
475 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
476 | ||
477 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
478 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
479 | ||
480 | static void sb_notify_work(struct work_struct *dummy) | |
481 | { | |
482 | acpi_handle sb_handle; | |
483 | ||
484 | orderly_poweroff(true); | |
485 | ||
486 | /* | |
487 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
488 | * to evaluate _OST method once every 10seconds to indicate that | |
489 | * the shutdown is in progress | |
490 | */ | |
491 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
492 | while (1) { | |
493 | pr_info("Graceful shutdown in progress.\n"); | |
494 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
495 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
496 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
497 | } | |
498 | } | |
499 | ||
500 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
501 | { | |
502 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
503 | ||
504 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
505 | if (!work_busy(&acpi_sb_work)) | |
506 | schedule_work(&acpi_sb_work); | |
507 | } else | |
508 | pr_warn("event %x is not supported by \\_SB device\n", event); | |
509 | } | |
510 | ||
511 | static int __init acpi_setup_sb_notify_handler(void) | |
512 | { | |
513 | acpi_handle sb_handle; | |
514 | ||
515 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
516 | return -ENXIO; | |
517 | ||
518 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
519 | acpi_sb_notify, NULL))) | |
520 | return -EINVAL; | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
68c6b148 RW |
525 | /* -------------------------------------------------------------------------- |
526 | Device Matching | |
527 | -------------------------------------------------------------------------- */ | |
528 | ||
3b95bd16 AM |
529 | /** |
530 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
531 | * @adev: ACPI device in question | |
532 | * | |
533 | * Return: First physical node of ACPI device @adev | |
534 | */ | |
535 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
536 | { |
537 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 538 | struct device *phys_dev; |
e91a398c RW |
539 | |
540 | mutex_lock(physical_node_lock); | |
541 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 542 | phys_dev = NULL; |
e91a398c RW |
543 | } else { |
544 | const struct acpi_device_physical_node *node; | |
545 | ||
546 | node = list_first_entry(&adev->physical_node_list, | |
547 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
548 | |
549 | phys_dev = node->dev; | |
e91a398c RW |
550 | } |
551 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
552 | return phys_dev; |
553 | } | |
554 | ||
555 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
556 | const struct device *dev) | |
557 | { | |
558 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
559 | ||
560 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
561 | } |
562 | ||
3431e490 RW |
563 | /** |
564 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
565 | * @adev: ACPI companion device | |
566 | * @dev: Physical device to check | |
567 | * | |
568 | * Function checks if given @dev is the first physical devices attached to | |
569 | * the ACPI companion device. This distinction is needed in some cases | |
570 | * where the same companion device is shared between many physical devices. | |
571 | * | |
572 | * Note that the caller have to provide valid @adev pointer. | |
573 | */ | |
574 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
575 | const struct device *dev) | |
576 | { | |
e91a398c | 577 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
578 | } |
579 | ||
68c6b148 RW |
580 | /* |
581 | * acpi_companion_match() - Can we match via ACPI companion device | |
582 | * @dev: Device in question | |
583 | * | |
584 | * Check if the given device has an ACPI companion and if that companion has | |
585 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
586 | * device associated with it. Return the companion pointer if that's the case | |
587 | * or NULL otherwise. | |
588 | * | |
589 | * If multiple physical devices are attached to a single ACPI companion, we need | |
590 | * to be careful. The usage scenario for this kind of relationship is that all | |
591 | * of the physical devices in question use resources provided by the ACPI | |
592 | * companion. A typical case is an MFD device where all the sub-devices share | |
593 | * the parent's ACPI companion. In such cases we can only allow the primary | |
594 | * (first) physical device to be matched with the help of the companion's PNP | |
595 | * IDs. | |
596 | * | |
597 | * Additional physical devices sharing the ACPI companion can still use | |
598 | * resources available from it but they will be matched normally using functions | |
599 | * provided by their bus types (and analogously for their modalias). | |
600 | */ | |
601 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
602 | { | |
603 | struct acpi_device *adev; | |
68c6b148 RW |
604 | |
605 | adev = ACPI_COMPANION(dev); | |
606 | if (!adev) | |
607 | return NULL; | |
608 | ||
609 | if (list_empty(&adev->pnp.ids)) | |
610 | return NULL; | |
611 | ||
e91a398c | 612 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
613 | } |
614 | ||
615 | /** | |
616 | * acpi_of_match_device - Match device object using the "compatible" property. | |
617 | * @adev: ACPI device object to match. | |
618 | * @of_match_table: List of device IDs to match against. | |
4222f38c | 619 | * @of_id: OF ID if matched |
68c6b148 RW |
620 | * |
621 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
622 | * identifiers and a _DSD object with the "compatible" property, use that | |
623 | * property to match against the given list of identifiers. | |
624 | */ | |
625 | static bool acpi_of_match_device(struct acpi_device *adev, | |
4222f38c AS |
626 | const struct of_device_id *of_match_table, |
627 | const struct of_device_id **of_id) | |
68c6b148 RW |
628 | { |
629 | const union acpi_object *of_compatible, *obj; | |
630 | int i, nval; | |
631 | ||
632 | if (!adev) | |
633 | return false; | |
634 | ||
635 | of_compatible = adev->data.of_compatible; | |
636 | if (!of_match_table || !of_compatible) | |
637 | return false; | |
638 | ||
639 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
640 | nval = of_compatible->package.count; | |
641 | obj = of_compatible->package.elements; | |
642 | } else { /* Must be ACPI_TYPE_STRING. */ | |
643 | nval = 1; | |
644 | obj = of_compatible; | |
645 | } | |
646 | /* Now we can look for the driver DT compatible strings */ | |
647 | for (i = 0; i < nval; i++, obj++) { | |
648 | const struct of_device_id *id; | |
649 | ||
650 | for (id = of_match_table; id->compatible[0]; id++) | |
4222f38c AS |
651 | if (!strcasecmp(obj->string.pointer, id->compatible)) { |
652 | if (of_id) | |
653 | *of_id = id; | |
68c6b148 | 654 | return true; |
4222f38c | 655 | } |
68c6b148 RW |
656 | } |
657 | ||
658 | return false; | |
659 | } | |
660 | ||
51ede5d9 DD |
661 | static bool acpi_of_modalias(struct acpi_device *adev, |
662 | char *modalias, size_t len) | |
663 | { | |
664 | const union acpi_object *of_compatible; | |
665 | const union acpi_object *obj; | |
666 | const char *str, *chr; | |
667 | ||
668 | of_compatible = adev->data.of_compatible; | |
669 | if (!of_compatible) | |
670 | return false; | |
671 | ||
672 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
673 | obj = of_compatible->package.elements; | |
674 | else /* Must be ACPI_TYPE_STRING. */ | |
675 | obj = of_compatible; | |
676 | ||
677 | str = obj->string.pointer; | |
678 | chr = strchr(str, ','); | |
679 | strlcpy(modalias, chr ? chr + 1 : str, len); | |
680 | ||
681 | return true; | |
682 | } | |
683 | ||
684 | /** | |
685 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
686 | * @adev: ACPI device object to match | |
687 | * @default_id: ID string to use as default if no compatible string found | |
688 | * @modalias: Pointer to buffer that modalias value will be copied into | |
689 | * @len: Length of modalias buffer | |
690 | * | |
691 | * This is a counterpart of of_modalias_node() for struct acpi_device objects. | |
692 | * If there is a compatible string for @adev, it will be copied to @modalias | |
693 | * with the vendor prefix stripped; otherwise, @default_id will be used. | |
694 | */ | |
695 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
696 | char *modalias, size_t len) | |
697 | { | |
698 | if (!acpi_of_modalias(adev, modalias, len)) | |
699 | strlcpy(modalias, default_id, len); | |
700 | } | |
701 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
702 | ||
68c6b148 RW |
703 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
704 | struct acpi_hardware_id *hwid) | |
705 | { | |
706 | int i, msk, byte_shift; | |
707 | char buf[3]; | |
708 | ||
709 | if (!id->cls) | |
710 | return false; | |
711 | ||
712 | /* Apply class-code bitmask, before checking each class-code byte */ | |
713 | for (i = 1; i <= 3; i++) { | |
714 | byte_shift = 8 * (3 - i); | |
715 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
716 | if (!msk) | |
717 | continue; | |
718 | ||
719 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
720 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
721 | return false; | |
722 | } | |
723 | return true; | |
724 | } | |
725 | ||
4222f38c AS |
726 | static bool __acpi_match_device(struct acpi_device *device, |
727 | const struct acpi_device_id *acpi_ids, | |
728 | const struct of_device_id *of_ids, | |
729 | const struct acpi_device_id **acpi_id, | |
730 | const struct of_device_id **of_id) | |
68c6b148 RW |
731 | { |
732 | const struct acpi_device_id *id; | |
733 | struct acpi_hardware_id *hwid; | |
734 | ||
735 | /* | |
736 | * If the device is not present, it is unnecessary to load device | |
737 | * driver for it. | |
738 | */ | |
739 | if (!device || !device->status.present) | |
4222f38c | 740 | return false; |
68c6b148 RW |
741 | |
742 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
743 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
4222f38c AS |
744 | if (acpi_ids) { |
745 | for (id = acpi_ids; id->id[0] || id->cls; id++) { | |
746 | if (id->id[0] && !strcmp((char *)id->id, hwid->id)) | |
747 | goto out_acpi_match; | |
748 | if (id->cls && __acpi_match_device_cls(id, hwid)) | |
749 | goto out_acpi_match; | |
750 | } | |
68c6b148 RW |
751 | } |
752 | ||
753 | /* | |
754 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
755 | * "compatible" property if found. | |
68c6b148 | 756 | */ |
4222f38c AS |
757 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)) |
758 | return acpi_of_match_device(device, of_ids, of_id); | |
68c6b148 | 759 | } |
4222f38c AS |
760 | return false; |
761 | ||
762 | out_acpi_match: | |
763 | if (acpi_id) | |
764 | *acpi_id = id; | |
765 | return true; | |
68c6b148 RW |
766 | } |
767 | ||
768 | /** | |
769 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
770 | * @ids: Array of struct acpi_device_id object to match against. | |
771 | * @dev: The device structure to match. | |
772 | * | |
773 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
774 | * object for that handle and use that object to match against a given list of | |
775 | * device IDs. | |
776 | * | |
777 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
778 | */ | |
779 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
780 | const struct device *dev) | |
781 | { | |
4222f38c AS |
782 | const struct acpi_device_id *id = NULL; |
783 | ||
784 | __acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL); | |
785 | return id; | |
68c6b148 RW |
786 | } |
787 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
788 | ||
886ca88b AS |
789 | static const void *acpi_of_device_get_match_data(const struct device *dev) |
790 | { | |
791 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
792 | const struct of_device_id *match = NULL; | |
793 | ||
794 | if (!acpi_of_match_device(adev, dev->driver->of_match_table, &match)) | |
795 | return NULL; | |
796 | ||
797 | return match->data; | |
798 | } | |
799 | ||
67dcc26d | 800 | const void *acpi_device_get_match_data(const struct device *dev) |
80212a16 SK |
801 | { |
802 | const struct acpi_device_id *match; | |
803 | ||
886ca88b AS |
804 | if (!dev->driver->acpi_match_table) |
805 | return acpi_of_device_get_match_data(dev); | |
806 | ||
80212a16 SK |
807 | match = acpi_match_device(dev->driver->acpi_match_table, dev); |
808 | if (!match) | |
809 | return NULL; | |
810 | ||
67dcc26d | 811 | return (const void *)match->driver_data; |
80212a16 | 812 | } |
29d5325a | 813 | EXPORT_SYMBOL_GPL(acpi_device_get_match_data); |
80212a16 | 814 | |
68c6b148 RW |
815 | int acpi_match_device_ids(struct acpi_device *device, |
816 | const struct acpi_device_id *ids) | |
817 | { | |
4222f38c | 818 | return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT; |
68c6b148 RW |
819 | } |
820 | EXPORT_SYMBOL(acpi_match_device_ids); | |
821 | ||
822 | bool acpi_driver_match_device(struct device *dev, | |
823 | const struct device_driver *drv) | |
824 | { | |
825 | if (!drv->acpi_match_table) | |
826 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
4222f38c AS |
827 | drv->of_match_table, |
828 | NULL); | |
68c6b148 | 829 | |
4222f38c AS |
830 | return __acpi_match_device(acpi_companion_match(dev), |
831 | drv->acpi_match_table, drv->of_match_table, | |
832 | NULL, NULL); | |
68c6b148 RW |
833 | } |
834 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
835 | ||
5894b0c4 RW |
836 | /* -------------------------------------------------------------------------- |
837 | ACPI Driver Management | |
838 | -------------------------------------------------------------------------- */ | |
839 | ||
840 | /** | |
841 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
842 | * @driver: driver being registered | |
843 | * | |
844 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
845 | * devices that match the driver's criteria and binds. Returns zero for | |
846 | * success or a negative error status for failure. | |
847 | */ | |
848 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
849 | { | |
850 | int ret; | |
851 | ||
852 | if (acpi_disabled) | |
853 | return -ENODEV; | |
854 | driver->drv.name = driver->name; | |
855 | driver->drv.bus = &acpi_bus_type; | |
856 | driver->drv.owner = driver->owner; | |
857 | ||
858 | ret = driver_register(&driver->drv); | |
859 | return ret; | |
860 | } | |
861 | ||
862 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
863 | ||
864 | /** | |
865 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
866 | * @driver: driver to unregister | |
867 | * | |
868 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
869 | * devices that match the driver's criteria and unbinds. | |
870 | */ | |
871 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
872 | { | |
873 | driver_unregister(&driver->drv); | |
874 | } | |
875 | ||
876 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
877 | ||
878 | /* -------------------------------------------------------------------------- | |
879 | ACPI Bus operations | |
880 | -------------------------------------------------------------------------- */ | |
881 | ||
882 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
883 | { | |
884 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
885 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
886 | ||
887 | return acpi_dev->flags.match_driver | |
888 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
889 | } | |
890 | ||
891 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
892 | { | |
893 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
894 | } | |
895 | ||
896 | static int acpi_device_probe(struct device *dev) | |
897 | { | |
898 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
899 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
900 | int ret; | |
901 | ||
902 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
903 | return -EINVAL; | |
904 | ||
905 | if (!acpi_drv->ops.add) | |
906 | return -ENOSYS; | |
907 | ||
908 | ret = acpi_drv->ops.add(acpi_dev); | |
909 | if (ret) | |
910 | return ret; | |
911 | ||
912 | acpi_dev->driver = acpi_drv; | |
913 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
914 | "Driver [%s] successfully bound to device [%s]\n", | |
915 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
916 | ||
917 | if (acpi_drv->ops.notify) { | |
918 | ret = acpi_device_install_notify_handler(acpi_dev); | |
919 | if (ret) { | |
920 | if (acpi_drv->ops.remove) | |
921 | acpi_drv->ops.remove(acpi_dev); | |
922 | ||
923 | acpi_dev->driver = NULL; | |
924 | acpi_dev->driver_data = NULL; | |
925 | return ret; | |
926 | } | |
927 | } | |
928 | ||
929 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
930 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
931 | get_device(dev); | |
932 | return 0; | |
933 | } | |
934 | ||
67fbd0a3 | 935 | static int acpi_device_remove(struct device *dev) |
5894b0c4 RW |
936 | { |
937 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
938 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
939 | ||
940 | if (acpi_drv) { | |
941 | if (acpi_drv->ops.notify) | |
942 | acpi_device_remove_notify_handler(acpi_dev); | |
943 | if (acpi_drv->ops.remove) | |
944 | acpi_drv->ops.remove(acpi_dev); | |
945 | } | |
946 | acpi_dev->driver = NULL; | |
947 | acpi_dev->driver_data = NULL; | |
948 | ||
949 | put_device(dev); | |
950 | return 0; | |
951 | } | |
952 | ||
953 | struct bus_type acpi_bus_type = { | |
954 | .name = "acpi", | |
955 | .match = acpi_bus_match, | |
956 | .probe = acpi_device_probe, | |
957 | .remove = acpi_device_remove, | |
958 | .uevent = acpi_device_uevent, | |
959 | }; | |
960 | ||
1da177e4 LT |
961 | /* -------------------------------------------------------------------------- |
962 | Initialization/Cleanup | |
963 | -------------------------------------------------------------------------- */ | |
964 | ||
4be44fcd | 965 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 966 | { |
6a8c0af6 | 967 | acpi_status status; |
4be44fcd | 968 | char *message = NULL; |
1da177e4 | 969 | |
1da177e4 | 970 | |
aafbcd16 | 971 | /* |
1da177e4 LT |
972 | * Let the system know what interrupt model we are using by |
973 | * evaluating the \_PIC object, if exists. | |
974 | */ | |
975 | ||
976 | switch (acpi_irq_model) { | |
977 | case ACPI_IRQ_MODEL_PIC: | |
978 | message = "PIC"; | |
979 | break; | |
980 | case ACPI_IRQ_MODEL_IOAPIC: | |
981 | message = "IOAPIC"; | |
982 | break; | |
983 | case ACPI_IRQ_MODEL_IOSAPIC: | |
984 | message = "IOSAPIC"; | |
985 | break; | |
fbe61ec7 HG |
986 | case ACPI_IRQ_MODEL_GIC: |
987 | message = "GIC"; | |
988 | break; | |
3948ec94 JK |
989 | case ACPI_IRQ_MODEL_PLATFORM: |
990 | message = "platform specific model"; | |
991 | break; | |
1da177e4 LT |
992 | default: |
993 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 994 | return -ENODEV; |
1da177e4 LT |
995 | } |
996 | ||
997 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
998 | ||
0db98202 | 999 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 1000 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 1001 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 1002 | return -ENODEV; |
1da177e4 LT |
1003 | } |
1004 | ||
d550d98d | 1005 | return 0; |
1da177e4 LT |
1006 | } |
1007 | ||
b064a8fa RW |
1008 | /** |
1009 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1010 | * | |
1011 | * The ACPI tables are accessible after this, but the handling of events has not | |
1012 | * been initialized and the global lock is not available yet, so AML should not | |
1013 | * be executed at this point. | |
1014 | * | |
1015 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1016 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1017 | */ | |
4be44fcd | 1018 | void __init acpi_early_init(void) |
1da177e4 | 1019 | { |
6a8c0af6 | 1020 | acpi_status status; |
1da177e4 LT |
1021 | |
1022 | if (acpi_disabled) | |
d550d98d | 1023 | return; |
1da177e4 | 1024 | |
61686124 BM |
1025 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
1026 | ||
1da177e4 LT |
1027 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1028 | if (!acpi_strict) | |
1029 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1030 | ||
8d3523fb | 1031 | acpi_permanent_mmap = true; |
ad71860a | 1032 | |
5d128fbd | 1033 | #ifdef CONFIG_X86 |
ae976358 KHF |
1034 | /* |
1035 | * If the machine falls into the DMI check table, | |
5d128fbd JD |
1036 | * DSDT will be copied to memory. |
1037 | * Note that calling dmi_check_system() here on other architectures | |
1038 | * would not be OK because only x86 initializes dmi early enough. | |
1039 | * Thankfully only x86 systems need such quirks for now. | |
ae976358 KHF |
1040 | */ |
1041 | dmi_check_system(dsdt_dmi_table); | |
5d128fbd | 1042 | #endif |
aa2110cb | 1043 | |
ad71860a AS |
1044 | status = acpi_reallocate_root_table(); |
1045 | if (ACPI_FAILURE(status)) { | |
1046 | printk(KERN_ERR PREFIX | |
1047 | "Unable to reallocate ACPI tables\n"); | |
1048 | goto error0; | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | status = acpi_initialize_subsystem(); |
1052 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
1053 | printk(KERN_ERR PREFIX |
1054 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
1055 | goto error0; |
1056 | } | |
1057 | ||
1da177e4 LT |
1058 | #ifdef CONFIG_X86 |
1059 | if (!acpi_ioapic) { | |
1da177e4 | 1060 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1061 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1062 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1063 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1064 | } | |
1da177e4 | 1065 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1066 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1067 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1068 | } else { |
1da177e4 | 1069 | /* |
cee324b1 | 1070 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1071 | * update it with result from INT_SRC_OVR parsing |
1072 | */ | |
cee324b1 | 1073 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1074 | } |
1075 | #endif | |
b064a8fa RW |
1076 | return; |
1077 | ||
1078 | error0: | |
1079 | disable_acpi(); | |
1080 | } | |
1081 | ||
1082 | /** | |
1083 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1084 | * | |
3af03f77 | 1085 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1086 | * |
1087 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1088 | * done before all things that really depend on ACPI. The right spot appears to | |
1089 | * be before finalizing the EFI initialization. | |
1090 | */ | |
1091 | void __init acpi_subsystem_init(void) | |
1092 | { | |
1093 | acpi_status status; | |
1094 | ||
1095 | if (acpi_disabled) | |
1096 | return; | |
1da177e4 | 1097 | |
4505a201 | 1098 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
1099 | if (ACPI_FAILURE(status)) { |
1100 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
1101 | disable_acpi(); |
1102 | } else { | |
1103 | /* | |
1104 | * If the system is using ACPI then we can be reasonably | |
1105 | * confident that any regulators are managed by the firmware | |
1106 | * so tell the regulator core it has everything it needs to | |
1107 | * know. | |
1108 | */ | |
1109 | regulator_has_full_constraints(); | |
1da177e4 | 1110 | } |
1da177e4 LT |
1111 | } |
1112 | ||
68bdb677 OP |
1113 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1114 | { | |
1115 | acpi_scan_table_handler(event, table, context); | |
1116 | ||
1117 | return acpi_sysfs_table_handler(event, table, context); | |
1118 | } | |
1119 | ||
4be44fcd | 1120 | static int __init acpi_bus_init(void) |
1da177e4 | 1121 | { |
6a8c0af6 BH |
1122 | int result; |
1123 | acpi_status status; | |
1da177e4 | 1124 | |
176f9c18 | 1125 | acpi_os_initialize1(); |
1da177e4 | 1126 | |
d737f333 ES |
1127 | status = acpi_load_tables(); |
1128 | if (ACPI_FAILURE(status)) { | |
1129 | printk(KERN_ERR PREFIX | |
1130 | "Unable to load the System Description Tables\n"); | |
1131 | goto error1; | |
fe6cbea0 LZ |
1132 | } |
1133 | ||
b1c03308 RW |
1134 | /* |
1135 | * ACPI 2.0 requires the EC driver to be loaded and work before the EC | |
1136 | * device is found in the namespace. | |
1137 | * | |
1138 | * This is accomplished by looking for the ECDT table and getting the EC | |
1139 | * parameters out of that. | |
1140 | * | |
1141 | * Do that before calling acpi_initialize_objects() which may trigger EC | |
1142 | * address space accesses. | |
1143 | */ | |
1144 | acpi_ec_ecdt_probe(); | |
1145 | ||
fe6cbea0 LZ |
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 LT |
1240 | |
1241 | result = acpi_bus_init(); | |
6831c6ed | 1242 | if (result) { |
1da177e4 | 1243 | disable_acpi(); |
81d0273d | 1244 | return result; |
6831c6ed | 1245 | } |
81d0273d | 1246 | |
6831c6ed | 1247 | pci_mmcfg_late_init(); |
88ef16d8 | 1248 | acpi_iort_init(); |
e747f274 | 1249 | acpi_scan_init(); |
a5f820fe | 1250 | acpi_ec_init(); |
a25ee920 | 1251 | acpi_debugfs_init(); |
9cee43e0 | 1252 | acpi_sleep_proc_init(); |
201b8c65 | 1253 | acpi_wakeup_device_init(); |
836d0830 | 1254 | acpi_debugger_init(); |
baa0c019 | 1255 | acpi_setup_sb_notify_handler(); |
6831c6ed | 1256 | return 0; |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | subsys_initcall(acpi_init); |