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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 | 155 | |
627ead72 | 156 | if (!data) |
20733939 ZR |
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 | |
01aabca2 JC |
306 | #ifdef CONFIG_ARM64 |
307 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; | |
308 | #endif | |
5c2832e9 | 309 | #ifdef CONFIG_X86 |
01aabca2 | 310 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; |
5c2832e9 SP |
311 | if (boot_cpu_has(X86_FEATURE_HWP)) { |
312 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; | |
313 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; | |
314 | } | |
315 | #endif | |
316 | ||
de966cf4 | 317 | if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
8b533a0e SP |
318 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
319 | ||
eccddd32 | 320 | if (!ghes_disable) |
b938a229 | 321 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
322 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
323 | return; | |
eccddd32 HY |
324 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
325 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 326 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 327 | osc_sb_apei_support_acked = |
b938a229 | 328 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
329 | osc_pc_lpi_support_confirmed = |
330 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
331 | } | |
3563ff96 | 332 | kfree(context.ret.pointer); |
eccddd32 HY |
333 | } |
334 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
335 | } |
336 | ||
1da177e4 LT |
337 | /* -------------------------------------------------------------------------- |
338 | Notification Handling | |
339 | -------------------------------------------------------------------------- */ | |
340 | ||
1da177e4 LT |
341 | /** |
342 | * acpi_bus_notify | |
343 | * --------------- | |
344 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
345 | */ | |
4be44fcd | 346 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 347 | { |
1a699476 | 348 | struct acpi_device *adev; |
6d278131 | 349 | struct acpi_driver *driver; |
1a699476 | 350 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 351 | bool hotplug_event = false; |
02c37bd8 | 352 | |
1da177e4 | 353 | switch (type) { |
1da177e4 | 354 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 355 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 356 | hotplug_event = true; |
1da177e4 LT |
357 | break; |
358 | ||
359 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 360 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 361 | hotplug_event = true; |
1da177e4 LT |
362 | break; |
363 | ||
364 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 365 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
366 | break; |
367 | ||
368 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 369 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 370 | hotplug_event = true; |
1da177e4 LT |
371 | break; |
372 | ||
373 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 374 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
375 | /* TBD: Exactly what does 'light' mean? */ |
376 | break; | |
377 | ||
378 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
379 | acpi_handle_err(handle, "Device cannot be configured due " |
380 | "to a frequency mismatch\n"); | |
1da177e4 LT |
381 | break; |
382 | ||
383 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
384 | acpi_handle_err(handle, "Device cannot be configured due " |
385 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
386 | break; |
387 | ||
388 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 389 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
390 | break; |
391 | ||
392 | default: | |
f66abe92 RW |
393 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
394 | break; | |
1da177e4 LT |
395 | } |
396 | ||
1a699476 RW |
397 | adev = acpi_bus_get_acpi_device(handle); |
398 | if (!adev) | |
399 | goto err; | |
78ea4639 | 400 | |
1a699476 RW |
401 | driver = adev->driver; |
402 | if (driver && driver->ops.notify && | |
403 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
404 | driver->ops.notify(adev, type); | |
405 | ||
9a4d8d60 LCY |
406 | if (!hotplug_event) { |
407 | acpi_bus_put_acpi_device(adev); | |
408 | return; | |
409 | } | |
410 | ||
411 | if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) | |
d0103387 RW |
412 | return; |
413 | ||
1a699476 | 414 | acpi_bus_put_acpi_device(adev); |
1a699476 RW |
415 | |
416 | err: | |
700b8422 | 417 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
418 | } |
419 | ||
5894b0c4 RW |
420 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
421 | { | |
422 | struct acpi_device *device = data; | |
423 | ||
424 | device->driver->ops.notify(device, event); | |
425 | } | |
426 | ||
427 | static void acpi_device_notify_fixed(void *data) | |
428 | { | |
429 | struct acpi_device *device = data; | |
430 | ||
431 | /* Fixed hardware devices have no handles */ | |
432 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
433 | } | |
434 | ||
435 | static u32 acpi_device_fixed_event(void *data) | |
436 | { | |
437 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
438 | return ACPI_INTERRUPT_HANDLED; | |
439 | } | |
440 | ||
441 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
442 | { | |
443 | acpi_status status; | |
444 | ||
445 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
446 | status = | |
447 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
448 | acpi_device_fixed_event, | |
449 | device); | |
450 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
451 | status = | |
452 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
453 | acpi_device_fixed_event, | |
454 | device); | |
455 | else | |
456 | status = acpi_install_notify_handler(device->handle, | |
457 | ACPI_DEVICE_NOTIFY, | |
458 | acpi_device_notify, | |
459 | device); | |
460 | ||
461 | if (ACPI_FAILURE(status)) | |
462 | return -EINVAL; | |
463 | return 0; | |
464 | } | |
465 | ||
466 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
467 | { | |
468 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
469 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
470 | acpi_device_fixed_event); | |
471 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
472 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
473 | acpi_device_fixed_event); | |
474 | else | |
475 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
476 | acpi_device_notify); | |
477 | } | |
478 | ||
baa0c019 PP |
479 | /* Handle events targeting \_SB device (at present only graceful shutdown) */ |
480 | ||
481 | #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 | |
482 | #define ACPI_SB_INDICATE_INTERVAL 10000 | |
483 | ||
484 | static void sb_notify_work(struct work_struct *dummy) | |
485 | { | |
486 | acpi_handle sb_handle; | |
487 | ||
488 | orderly_poweroff(true); | |
489 | ||
490 | /* | |
491 | * After initiating graceful shutdown, the ACPI spec requires OSPM | |
492 | * to evaluate _OST method once every 10seconds to indicate that | |
493 | * the shutdown is in progress | |
494 | */ | |
495 | acpi_get_handle(NULL, "\\_SB", &sb_handle); | |
496 | while (1) { | |
497 | pr_info("Graceful shutdown in progress.\n"); | |
498 | acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, | |
499 | ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); | |
500 | msleep(ACPI_SB_INDICATE_INTERVAL); | |
501 | } | |
502 | } | |
503 | ||
504 | static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) | |
505 | { | |
506 | static DECLARE_WORK(acpi_sb_work, sb_notify_work); | |
507 | ||
508 | if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { | |
509 | if (!work_busy(&acpi_sb_work)) | |
510 | schedule_work(&acpi_sb_work); | |
511 | } else | |
512 | pr_warn("event %x is not supported by \\_SB device\n", event); | |
513 | } | |
514 | ||
515 | static int __init acpi_setup_sb_notify_handler(void) | |
516 | { | |
517 | acpi_handle sb_handle; | |
518 | ||
519 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) | |
520 | return -ENXIO; | |
521 | ||
522 | if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, | |
523 | acpi_sb_notify, NULL))) | |
524 | return -EINVAL; | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
68c6b148 RW |
529 | /* -------------------------------------------------------------------------- |
530 | Device Matching | |
531 | -------------------------------------------------------------------------- */ | |
532 | ||
3b95bd16 AM |
533 | /** |
534 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
535 | * @adev: ACPI device in question | |
536 | * | |
537 | * Return: First physical node of ACPI device @adev | |
538 | */ | |
539 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
540 | { |
541 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 542 | struct device *phys_dev; |
e91a398c RW |
543 | |
544 | mutex_lock(physical_node_lock); | |
545 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 546 | phys_dev = NULL; |
e91a398c RW |
547 | } else { |
548 | const struct acpi_device_physical_node *node; | |
549 | ||
550 | node = list_first_entry(&adev->physical_node_list, | |
551 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
552 | |
553 | phys_dev = node->dev; | |
e91a398c RW |
554 | } |
555 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
556 | return phys_dev; |
557 | } | |
1c9698f8 | 558 | EXPORT_SYMBOL_GPL(acpi_get_first_physical_node); |
3b95bd16 AM |
559 | |
560 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
561 | const struct device *dev) | |
562 | { | |
563 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
564 | ||
565 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
566 | } |
567 | ||
3431e490 RW |
568 | /** |
569 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
570 | * @adev: ACPI companion device | |
571 | * @dev: Physical device to check | |
572 | * | |
573 | * Function checks if given @dev is the first physical devices attached to | |
574 | * the ACPI companion device. This distinction is needed in some cases | |
575 | * where the same companion device is shared between many physical devices. | |
576 | * | |
577 | * Note that the caller have to provide valid @adev pointer. | |
578 | */ | |
579 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
580 | const struct device *dev) | |
581 | { | |
e91a398c | 582 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
583 | } |
584 | ||
68c6b148 RW |
585 | /* |
586 | * acpi_companion_match() - Can we match via ACPI companion device | |
587 | * @dev: Device in question | |
588 | * | |
589 | * Check if the given device has an ACPI companion and if that companion has | |
590 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
591 | * device associated with it. Return the companion pointer if that's the case | |
592 | * or NULL otherwise. | |
593 | * | |
594 | * If multiple physical devices are attached to a single ACPI companion, we need | |
595 | * to be careful. The usage scenario for this kind of relationship is that all | |
596 | * of the physical devices in question use resources provided by the ACPI | |
597 | * companion. A typical case is an MFD device where all the sub-devices share | |
598 | * the parent's ACPI companion. In such cases we can only allow the primary | |
599 | * (first) physical device to be matched with the help of the companion's PNP | |
600 | * IDs. | |
601 | * | |
602 | * Additional physical devices sharing the ACPI companion can still use | |
603 | * resources available from it but they will be matched normally using functions | |
604 | * provided by their bus types (and analogously for their modalias). | |
605 | */ | |
606 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
607 | { | |
608 | struct acpi_device *adev; | |
68c6b148 RW |
609 | |
610 | adev = ACPI_COMPANION(dev); | |
611 | if (!adev) | |
612 | return NULL; | |
613 | ||
614 | if (list_empty(&adev->pnp.ids)) | |
615 | return NULL; | |
616 | ||
e91a398c | 617 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
618 | } |
619 | ||
620 | /** | |
621 | * acpi_of_match_device - Match device object using the "compatible" property. | |
622 | * @adev: ACPI device object to match. | |
623 | * @of_match_table: List of device IDs to match against. | |
4222f38c | 624 | * @of_id: OF ID if matched |
68c6b148 RW |
625 | * |
626 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
627 | * identifiers and a _DSD object with the "compatible" property, use that | |
628 | * property to match against the given list of identifiers. | |
629 | */ | |
630 | static bool acpi_of_match_device(struct acpi_device *adev, | |
4222f38c AS |
631 | const struct of_device_id *of_match_table, |
632 | const struct of_device_id **of_id) | |
68c6b148 RW |
633 | { |
634 | const union acpi_object *of_compatible, *obj; | |
635 | int i, nval; | |
636 | ||
637 | if (!adev) | |
638 | return false; | |
639 | ||
640 | of_compatible = adev->data.of_compatible; | |
641 | if (!of_match_table || !of_compatible) | |
642 | return false; | |
643 | ||
644 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
645 | nval = of_compatible->package.count; | |
646 | obj = of_compatible->package.elements; | |
647 | } else { /* Must be ACPI_TYPE_STRING. */ | |
648 | nval = 1; | |
649 | obj = of_compatible; | |
650 | } | |
651 | /* Now we can look for the driver DT compatible strings */ | |
652 | for (i = 0; i < nval; i++, obj++) { | |
653 | const struct of_device_id *id; | |
654 | ||
655 | for (id = of_match_table; id->compatible[0]; id++) | |
4222f38c AS |
656 | if (!strcasecmp(obj->string.pointer, id->compatible)) { |
657 | if (of_id) | |
658 | *of_id = id; | |
68c6b148 | 659 | return true; |
4222f38c | 660 | } |
68c6b148 RW |
661 | } |
662 | ||
663 | return false; | |
664 | } | |
665 | ||
51ede5d9 DD |
666 | static bool acpi_of_modalias(struct acpi_device *adev, |
667 | char *modalias, size_t len) | |
668 | { | |
669 | const union acpi_object *of_compatible; | |
670 | const union acpi_object *obj; | |
671 | const char *str, *chr; | |
672 | ||
673 | of_compatible = adev->data.of_compatible; | |
674 | if (!of_compatible) | |
675 | return false; | |
676 | ||
677 | if (of_compatible->type == ACPI_TYPE_PACKAGE) | |
678 | obj = of_compatible->package.elements; | |
679 | else /* Must be ACPI_TYPE_STRING. */ | |
680 | obj = of_compatible; | |
681 | ||
682 | str = obj->string.pointer; | |
683 | chr = strchr(str, ','); | |
684 | strlcpy(modalias, chr ? chr + 1 : str, len); | |
685 | ||
686 | return true; | |
687 | } | |
688 | ||
689 | /** | |
690 | * acpi_set_modalias - Set modalias using "compatible" property or supplied ID | |
691 | * @adev: ACPI device object to match | |
692 | * @default_id: ID string to use as default if no compatible string found | |
693 | * @modalias: Pointer to buffer that modalias value will be copied into | |
694 | * @len: Length of modalias buffer | |
695 | * | |
696 | * This is a counterpart of of_modalias_node() for struct acpi_device objects. | |
697 | * If there is a compatible string for @adev, it will be copied to @modalias | |
698 | * with the vendor prefix stripped; otherwise, @default_id will be used. | |
699 | */ | |
700 | void acpi_set_modalias(struct acpi_device *adev, const char *default_id, | |
701 | char *modalias, size_t len) | |
702 | { | |
703 | if (!acpi_of_modalias(adev, modalias, len)) | |
704 | strlcpy(modalias, default_id, len); | |
705 | } | |
706 | EXPORT_SYMBOL_GPL(acpi_set_modalias); | |
707 | ||
68c6b148 RW |
708 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, |
709 | struct acpi_hardware_id *hwid) | |
710 | { | |
711 | int i, msk, byte_shift; | |
712 | char buf[3]; | |
713 | ||
714 | if (!id->cls) | |
715 | return false; | |
716 | ||
717 | /* Apply class-code bitmask, before checking each class-code byte */ | |
718 | for (i = 1; i <= 3; i++) { | |
719 | byte_shift = 8 * (3 - i); | |
720 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
721 | if (!msk) | |
722 | continue; | |
723 | ||
724 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
725 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
726 | return false; | |
727 | } | |
728 | return true; | |
729 | } | |
730 | ||
4222f38c AS |
731 | static bool __acpi_match_device(struct acpi_device *device, |
732 | const struct acpi_device_id *acpi_ids, | |
733 | const struct of_device_id *of_ids, | |
734 | const struct acpi_device_id **acpi_id, | |
735 | const struct of_device_id **of_id) | |
68c6b148 RW |
736 | { |
737 | const struct acpi_device_id *id; | |
738 | struct acpi_hardware_id *hwid; | |
739 | ||
740 | /* | |
741 | * If the device is not present, it is unnecessary to load device | |
742 | * driver for it. | |
743 | */ | |
744 | if (!device || !device->status.present) | |
4222f38c | 745 | return false; |
68c6b148 RW |
746 | |
747 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
748 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
4222f38c AS |
749 | if (acpi_ids) { |
750 | for (id = acpi_ids; id->id[0] || id->cls; id++) { | |
751 | if (id->id[0] && !strcmp((char *)id->id, hwid->id)) | |
752 | goto out_acpi_match; | |
753 | if (id->cls && __acpi_match_device_cls(id, hwid)) | |
754 | goto out_acpi_match; | |
755 | } | |
68c6b148 RW |
756 | } |
757 | ||
758 | /* | |
759 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
760 | * "compatible" property if found. | |
68c6b148 | 761 | */ |
4222f38c AS |
762 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)) |
763 | return acpi_of_match_device(device, of_ids, of_id); | |
68c6b148 | 764 | } |
4222f38c AS |
765 | return false; |
766 | ||
767 | out_acpi_match: | |
768 | if (acpi_id) | |
769 | *acpi_id = id; | |
770 | return true; | |
68c6b148 RW |
771 | } |
772 | ||
773 | /** | |
774 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
775 | * @ids: Array of struct acpi_device_id object to match against. | |
776 | * @dev: The device structure to match. | |
777 | * | |
778 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
779 | * object for that handle and use that object to match against a given list of | |
780 | * device IDs. | |
781 | * | |
782 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
783 | */ | |
784 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
785 | const struct device *dev) | |
786 | { | |
4222f38c AS |
787 | const struct acpi_device_id *id = NULL; |
788 | ||
789 | __acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL); | |
790 | return id; | |
68c6b148 RW |
791 | } |
792 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
793 | ||
886ca88b AS |
794 | static const void *acpi_of_device_get_match_data(const struct device *dev) |
795 | { | |
796 | struct acpi_device *adev = ACPI_COMPANION(dev); | |
797 | const struct of_device_id *match = NULL; | |
798 | ||
799 | if (!acpi_of_match_device(adev, dev->driver->of_match_table, &match)) | |
800 | return NULL; | |
801 | ||
802 | return match->data; | |
803 | } | |
804 | ||
67dcc26d | 805 | const void *acpi_device_get_match_data(const struct device *dev) |
80212a16 SK |
806 | { |
807 | const struct acpi_device_id *match; | |
808 | ||
886ca88b AS |
809 | if (!dev->driver->acpi_match_table) |
810 | return acpi_of_device_get_match_data(dev); | |
811 | ||
80212a16 SK |
812 | match = acpi_match_device(dev->driver->acpi_match_table, dev); |
813 | if (!match) | |
814 | return NULL; | |
815 | ||
67dcc26d | 816 | return (const void *)match->driver_data; |
80212a16 | 817 | } |
29d5325a | 818 | EXPORT_SYMBOL_GPL(acpi_device_get_match_data); |
80212a16 | 819 | |
68c6b148 RW |
820 | int acpi_match_device_ids(struct acpi_device *device, |
821 | const struct acpi_device_id *ids) | |
822 | { | |
4222f38c | 823 | return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT; |
68c6b148 RW |
824 | } |
825 | EXPORT_SYMBOL(acpi_match_device_ids); | |
826 | ||
827 | bool acpi_driver_match_device(struct device *dev, | |
828 | const struct device_driver *drv) | |
829 | { | |
830 | if (!drv->acpi_match_table) | |
831 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
4222f38c AS |
832 | drv->of_match_table, |
833 | NULL); | |
68c6b148 | 834 | |
4222f38c AS |
835 | return __acpi_match_device(acpi_companion_match(dev), |
836 | drv->acpi_match_table, drv->of_match_table, | |
837 | NULL, NULL); | |
68c6b148 RW |
838 | } |
839 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
840 | ||
5894b0c4 RW |
841 | /* -------------------------------------------------------------------------- |
842 | ACPI Driver Management | |
843 | -------------------------------------------------------------------------- */ | |
844 | ||
845 | /** | |
846 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
847 | * @driver: driver being registered | |
848 | * | |
849 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
850 | * devices that match the driver's criteria and binds. Returns zero for | |
851 | * success or a negative error status for failure. | |
852 | */ | |
853 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
854 | { | |
855 | int ret; | |
856 | ||
857 | if (acpi_disabled) | |
858 | return -ENODEV; | |
859 | driver->drv.name = driver->name; | |
860 | driver->drv.bus = &acpi_bus_type; | |
861 | driver->drv.owner = driver->owner; | |
862 | ||
863 | ret = driver_register(&driver->drv); | |
864 | return ret; | |
865 | } | |
866 | ||
867 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
868 | ||
869 | /** | |
870 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
871 | * @driver: driver to unregister | |
872 | * | |
873 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
874 | * devices that match the driver's criteria and unbinds. | |
875 | */ | |
876 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
877 | { | |
878 | driver_unregister(&driver->drv); | |
879 | } | |
880 | ||
881 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
882 | ||
883 | /* -------------------------------------------------------------------------- | |
884 | ACPI Bus operations | |
885 | -------------------------------------------------------------------------- */ | |
886 | ||
887 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
888 | { | |
889 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
890 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
891 | ||
892 | return acpi_dev->flags.match_driver | |
893 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
894 | } | |
895 | ||
896 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
897 | { | |
898 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
899 | } | |
900 | ||
901 | static int acpi_device_probe(struct device *dev) | |
902 | { | |
903 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
904 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
905 | int ret; | |
906 | ||
907 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
908 | return -EINVAL; | |
909 | ||
910 | if (!acpi_drv->ops.add) | |
911 | return -ENOSYS; | |
912 | ||
913 | ret = acpi_drv->ops.add(acpi_dev); | |
914 | if (ret) | |
915 | return ret; | |
916 | ||
917 | acpi_dev->driver = acpi_drv; | |
918 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
919 | "Driver [%s] successfully bound to device [%s]\n", | |
920 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
921 | ||
922 | if (acpi_drv->ops.notify) { | |
923 | ret = acpi_device_install_notify_handler(acpi_dev); | |
924 | if (ret) { | |
925 | if (acpi_drv->ops.remove) | |
926 | acpi_drv->ops.remove(acpi_dev); | |
927 | ||
928 | acpi_dev->driver = NULL; | |
929 | acpi_dev->driver_data = NULL; | |
930 | return ret; | |
931 | } | |
932 | } | |
933 | ||
934 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
935 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
936 | get_device(dev); | |
937 | return 0; | |
938 | } | |
939 | ||
67fbd0a3 | 940 | static int acpi_device_remove(struct device *dev) |
5894b0c4 RW |
941 | { |
942 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
943 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
944 | ||
945 | if (acpi_drv) { | |
946 | if (acpi_drv->ops.notify) | |
947 | acpi_device_remove_notify_handler(acpi_dev); | |
948 | if (acpi_drv->ops.remove) | |
949 | acpi_drv->ops.remove(acpi_dev); | |
950 | } | |
951 | acpi_dev->driver = NULL; | |
952 | acpi_dev->driver_data = NULL; | |
953 | ||
954 | put_device(dev); | |
955 | return 0; | |
956 | } | |
957 | ||
958 | struct bus_type acpi_bus_type = { | |
959 | .name = "acpi", | |
960 | .match = acpi_bus_match, | |
961 | .probe = acpi_device_probe, | |
962 | .remove = acpi_device_remove, | |
963 | .uevent = acpi_device_uevent, | |
964 | }; | |
965 | ||
1da177e4 LT |
966 | /* -------------------------------------------------------------------------- |
967 | Initialization/Cleanup | |
968 | -------------------------------------------------------------------------- */ | |
969 | ||
4be44fcd | 970 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 971 | { |
6a8c0af6 | 972 | acpi_status status; |
4be44fcd | 973 | char *message = NULL; |
1da177e4 | 974 | |
1da177e4 | 975 | |
aafbcd16 | 976 | /* |
1da177e4 LT |
977 | * Let the system know what interrupt model we are using by |
978 | * evaluating the \_PIC object, if exists. | |
979 | */ | |
980 | ||
981 | switch (acpi_irq_model) { | |
982 | case ACPI_IRQ_MODEL_PIC: | |
983 | message = "PIC"; | |
984 | break; | |
985 | case ACPI_IRQ_MODEL_IOAPIC: | |
986 | message = "IOAPIC"; | |
987 | break; | |
988 | case ACPI_IRQ_MODEL_IOSAPIC: | |
989 | message = "IOSAPIC"; | |
990 | break; | |
fbe61ec7 HG |
991 | case ACPI_IRQ_MODEL_GIC: |
992 | message = "GIC"; | |
993 | break; | |
3948ec94 JK |
994 | case ACPI_IRQ_MODEL_PLATFORM: |
995 | message = "platform specific model"; | |
996 | break; | |
1da177e4 LT |
997 | default: |
998 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 999 | return -ENODEV; |
1da177e4 LT |
1000 | } |
1001 | ||
1002 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
1003 | ||
0db98202 | 1004 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 1005 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 1006 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 1007 | return -ENODEV; |
1da177e4 LT |
1008 | } |
1009 | ||
d550d98d | 1010 | return 0; |
1da177e4 LT |
1011 | } |
1012 | ||
b064a8fa RW |
1013 | /** |
1014 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
1015 | * | |
1016 | * The ACPI tables are accessible after this, but the handling of events has not | |
1017 | * been initialized and the global lock is not available yet, so AML should not | |
1018 | * be executed at this point. | |
1019 | * | |
1020 | * Doing this before switching the EFI runtime services to virtual mode allows | |
1021 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
1022 | */ | |
4be44fcd | 1023 | void __init acpi_early_init(void) |
1da177e4 | 1024 | { |
6a8c0af6 | 1025 | acpi_status status; |
1da177e4 LT |
1026 | |
1027 | if (acpi_disabled) | |
d550d98d | 1028 | return; |
1da177e4 | 1029 | |
61686124 BM |
1030 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
1031 | ||
1da177e4 LT |
1032 | /* enable workarounds, unless strict ACPI spec. compliance */ |
1033 | if (!acpi_strict) | |
1034 | acpi_gbl_enable_interpreter_slack = TRUE; | |
1035 | ||
8d3523fb | 1036 | acpi_permanent_mmap = true; |
ad71860a | 1037 | |
5d128fbd | 1038 | #ifdef CONFIG_X86 |
ae976358 KHF |
1039 | /* |
1040 | * If the machine falls into the DMI check table, | |
5d128fbd JD |
1041 | * DSDT will be copied to memory. |
1042 | * Note that calling dmi_check_system() here on other architectures | |
1043 | * would not be OK because only x86 initializes dmi early enough. | |
1044 | * Thankfully only x86 systems need such quirks for now. | |
ae976358 KHF |
1045 | */ |
1046 | dmi_check_system(dsdt_dmi_table); | |
5d128fbd | 1047 | #endif |
aa2110cb | 1048 | |
ad71860a AS |
1049 | status = acpi_reallocate_root_table(); |
1050 | if (ACPI_FAILURE(status)) { | |
1051 | printk(KERN_ERR PREFIX | |
1052 | "Unable to reallocate ACPI tables\n"); | |
1053 | goto error0; | |
1054 | } | |
1055 | ||
1da177e4 LT |
1056 | status = acpi_initialize_subsystem(); |
1057 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
1058 | printk(KERN_ERR PREFIX |
1059 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
1060 | goto error0; |
1061 | } | |
1062 | ||
1da177e4 LT |
1063 | #ifdef CONFIG_X86 |
1064 | if (!acpi_ioapic) { | |
1da177e4 | 1065 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
1066 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
1067 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
1068 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
1069 | } | |
1da177e4 | 1070 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 1071 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 1072 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 1073 | } else { |
1da177e4 | 1074 | /* |
cee324b1 | 1075 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
1076 | * update it with result from INT_SRC_OVR parsing |
1077 | */ | |
cee324b1 | 1078 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
1079 | } |
1080 | #endif | |
b064a8fa RW |
1081 | return; |
1082 | ||
1083 | error0: | |
1084 | disable_acpi(); | |
1085 | } | |
1086 | ||
1087 | /** | |
1088 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
1089 | * | |
3af03f77 | 1090 | * Switch over the platform to the ACPI mode (if possible). |
b064a8fa RW |
1091 | * |
1092 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
1093 | * done before all things that really depend on ACPI. The right spot appears to | |
1094 | * be before finalizing the EFI initialization. | |
1095 | */ | |
1096 | void __init acpi_subsystem_init(void) | |
1097 | { | |
1098 | acpi_status status; | |
1099 | ||
1100 | if (acpi_disabled) | |
1101 | return; | |
1da177e4 | 1102 | |
4505a201 | 1103 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
1104 | if (ACPI_FAILURE(status)) { |
1105 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
1106 | disable_acpi(); |
1107 | } else { | |
1108 | /* | |
1109 | * If the system is using ACPI then we can be reasonably | |
1110 | * confident that any regulators are managed by the firmware | |
1111 | * so tell the regulator core it has everything it needs to | |
1112 | * know. | |
1113 | */ | |
1114 | regulator_has_full_constraints(); | |
1da177e4 | 1115 | } |
1da177e4 LT |
1116 | } |
1117 | ||
68bdb677 OP |
1118 | static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) |
1119 | { | |
1120 | acpi_scan_table_handler(event, table, context); | |
1121 | ||
1122 | return acpi_sysfs_table_handler(event, table, context); | |
1123 | } | |
1124 | ||
4be44fcd | 1125 | static int __init acpi_bus_init(void) |
1da177e4 | 1126 | { |
6a8c0af6 BH |
1127 | int result; |
1128 | acpi_status status; | |
1da177e4 | 1129 | |
176f9c18 | 1130 | acpi_os_initialize1(); |
1da177e4 | 1131 | |
d737f333 EK |
1132 | status = acpi_load_tables(); |
1133 | if (ACPI_FAILURE(status)) { | |
1134 | printk(KERN_ERR PREFIX | |
1135 | "Unable to load the System Description Tables\n"); | |
1136 | goto error1; | |
fe6cbea0 LZ |
1137 | } |
1138 | ||
b1c03308 RW |
1139 | /* |
1140 | * ACPI 2.0 requires the EC driver to be loaded and work before the EC | |
1141 | * device is found in the namespace. | |
1142 | * | |
1143 | * This is accomplished by looking for the ECDT table and getting the EC | |
1144 | * parameters out of that. | |
1145 | * | |
1146 | * Do that before calling acpi_initialize_objects() which may trigger EC | |
1147 | * address space accesses. | |
1148 | */ | |
1149 | acpi_ec_ecdt_probe(); | |
1150 | ||
fe6cbea0 LZ |
1151 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); |
1152 | if (ACPI_FAILURE(status)) { | |
1153 | printk(KERN_ERR PREFIX | |
1154 | "Unable to start the ACPI Interpreter\n"); | |
1155 | goto error1; | |
1156 | } | |
1157 | ||
1da177e4 LT |
1158 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1159 | if (ACPI_FAILURE(status)) { | |
1160 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1161 | goto error1; | |
1162 | } | |
1163 | ||
a2121167 SP |
1164 | /* Set capability bits for _OSC under processor scope */ |
1165 | acpi_early_processor_osc(); | |
1166 | ||
fc54ab72 LM |
1167 | /* |
1168 | * _OSC method may exist in module level code, | |
1169 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1170 | */ | |
1171 | acpi_bus_osc_support(); | |
1172 | ||
b1d248d9 ZR |
1173 | /* |
1174 | * _PDC control method may load dynamic SSDT tables, | |
1175 | * and we need to install the table handler before that. | |
1176 | */ | |
68bdb677 OP |
1177 | status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
1178 | ||
b1d248d9 ZR |
1179 | acpi_sysfs_init(); |
1180 | ||
78f16996 AC |
1181 | acpi_early_processor_set_pdc(); |
1182 | ||
455c8793 ZY |
1183 | /* |
1184 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1185 | * is necessary to enable it as early as possible. | |
1186 | */ | |
dcf15cbd | 1187 | acpi_ec_dsdt_probe(); |
455c8793 | 1188 | |
1da177e4 LT |
1189 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1190 | ||
aafbcd16 AS |
1191 | /* Initialize sleep structures */ |
1192 | acpi_sleep_init(); | |
1193 | ||
1da177e4 LT |
1194 | /* |
1195 | * Get the system interrupt model and evaluate \_PIC. | |
1196 | */ | |
1197 | result = acpi_bus_init_irq(); | |
1198 | if (result) | |
1199 | goto error1; | |
1200 | ||
1201 | /* | |
1202 | * Register the for all standard device notifications. | |
1203 | */ | |
4be44fcd LB |
1204 | status = |
1205 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1206 | &acpi_bus_notify, NULL); | |
1da177e4 | 1207 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1208 | printk(KERN_ERR PREFIX |
1209 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1210 | goto error1; |
1211 | } | |
1212 | ||
1213 | /* | |
1214 | * Create the top ACPI proc directory | |
1215 | */ | |
1216 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1217 | ||
1dcc3d33 RW |
1218 | result = bus_register(&acpi_bus_type); |
1219 | if (!result) | |
1220 | return 0; | |
1da177e4 LT |
1221 | |
1222 | /* Mimic structured exception handling */ | |
4be44fcd | 1223 | error1: |
1da177e4 | 1224 | acpi_terminate(); |
d550d98d | 1225 | return -ENODEV; |
1da177e4 LT |
1226 | } |
1227 | ||
99e0d2fc | 1228 | struct kobject *acpi_kobj; |
f2d4753f | 1229 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1230 | |
4be44fcd | 1231 | static int __init acpi_init(void) |
1da177e4 | 1232 | { |
6831c6ed | 1233 | int result; |
1da177e4 | 1234 | |
1da177e4 LT |
1235 | if (acpi_disabled) { |
1236 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1237 | return -ENODEV; |
1da177e4 LT |
1238 | } |
1239 | ||
f62ed9e3 | 1240 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1241 | if (!acpi_kobj) { |
96b2dd1f | 1242 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1243 | acpi_kobj = NULL; |
1244 | } | |
1da177e4 LT |
1245 | |
1246 | result = acpi_bus_init(); | |
6831c6ed | 1247 | if (result) { |
a34fa88f | 1248 | kobject_put(acpi_kobj); |
1da177e4 | 1249 | disable_acpi(); |
81d0273d | 1250 | return result; |
6831c6ed | 1251 | } |
81d0273d | 1252 | |
6831c6ed | 1253 | pci_mmcfg_late_init(); |
88ef16d8 | 1254 | acpi_iort_init(); |
e747f274 | 1255 | acpi_scan_init(); |
a5f820fe | 1256 | acpi_ec_init(); |
a25ee920 | 1257 | acpi_debugfs_init(); |
9cee43e0 | 1258 | acpi_sleep_proc_init(); |
201b8c65 | 1259 | acpi_wakeup_device_init(); |
836d0830 | 1260 | acpi_debugger_init(); |
baa0c019 | 1261 | acpi_setup_sb_notify_handler(); |
6831c6ed | 1262 | return 0; |
1da177e4 LT |
1263 | } |
1264 | ||
1265 | subsys_initcall(acpi_init); |