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1da177e4 LT |
1 | /* |
2 | * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
5 | * | |
6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
1da177e4 LT |
18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/ioport.h> | |
d568df84 | 24 | #include <linux/kernel.h> |
1da177e4 LT |
25 | #include <linux/list.h> |
26 | #include <linux/sched.h> | |
27 | #include <linux/pm.h> | |
28 | #include <linux/device.h> | |
29 | #include <linux/proc_fs.h> | |
6697c052 | 30 | #include <linux/acpi.h> |
5a0e3ad6 | 31 | #include <linux/slab.h> |
49a12877 | 32 | #include <linux/regulator/machine.h> |
1da177e4 LT |
33 | #ifdef CONFIG_X86 |
34 | #include <asm/mpspec.h> | |
35 | #endif | |
7752d5cf | 36 | #include <linux/pci.h> |
eccddd32 | 37 | #include <acpi/apei.h> |
eb27cae8 | 38 | #include <linux/dmi.h> |
cd51e61c | 39 | #include <linux/suspend.h> |
1da177e4 | 40 | |
e60cc7a6 BH |
41 | #include "internal.h" |
42 | ||
1da177e4 | 43 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 44 | ACPI_MODULE_NAME("bus"); |
1da177e4 | 45 | |
4be44fcd LB |
46 | struct acpi_device *acpi_root; |
47 | struct proc_dir_entry *acpi_root_dir; | |
1da177e4 LT |
48 | EXPORT_SYMBOL(acpi_root_dir); |
49 | ||
cce4f632 | 50 | #ifdef CONFIG_X86 |
73577d1d LZ |
51 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
52 | static inline int set_copy_dsdt(const struct dmi_system_id *id) | |
53 | { | |
54 | return 0; | |
55 | } | |
56 | #else | |
aa2110cb LM |
57 | static int set_copy_dsdt(const struct dmi_system_id *id) |
58 | { | |
59 | printk(KERN_NOTICE "%s detected - " | |
60 | "force copy of DSDT to local memory\n", id->ident); | |
61 | acpi_gbl_copy_dsdt_locally = 1; | |
62 | return 0; | |
63 | } | |
73577d1d | 64 | #endif |
aa2110cb LM |
65 | |
66 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
67 | /* | |
100cf877 | 68 | * Invoke DSDT corruption work-around on all Toshiba Satellite. |
aa2110cb LM |
69 | * https://bugzilla.kernel.org/show_bug.cgi?id=14679 |
70 | */ | |
71 | { | |
72 | .callback = set_copy_dsdt, | |
100cf877 | 73 | .ident = "TOSHIBA Satellite", |
aa2110cb LM |
74 | .matches = { |
75 | DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), | |
100cf877 | 76 | DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
aa2110cb | 77 | }, |
cce4f632 LM |
78 | }, |
79 | {} | |
aa2110cb | 80 | }; |
cce4f632 LM |
81 | #else |
82 | static struct dmi_system_id dsdt_dmi_table[] __initdata = { | |
83 | {} | |
84 | }; | |
85 | #endif | |
aa2110cb | 86 | |
1da177e4 LT |
87 | /* -------------------------------------------------------------------------- |
88 | Device Management | |
89 | -------------------------------------------------------------------------- */ | |
90 | ||
402ac536 BH |
91 | acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
92 | unsigned long long *sta) | |
1da177e4 | 93 | { |
402ac536 | 94 | acpi_status status; |
4be44fcd | 95 | |
402ac536 BH |
96 | status = acpi_evaluate_integer(handle, "_STA", NULL, sta); |
97 | if (ACPI_SUCCESS(status)) | |
98 | return AE_OK; | |
1da177e4 | 99 | |
402ac536 BH |
100 | if (status == AE_NOT_FOUND) { |
101 | *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | | |
102 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; | |
103 | return AE_OK; | |
1da177e4 | 104 | } |
402ac536 BH |
105 | return status; |
106 | } | |
1da177e4 | 107 | |
402ac536 BH |
108 | int acpi_bus_get_status(struct acpi_device *device) |
109 | { | |
110 | acpi_status status; | |
111 | unsigned long long sta; | |
112 | ||
113 | status = acpi_bus_get_status_handle(device->handle, &sta); | |
114 | if (ACPI_FAILURE(status)) | |
115 | return -ENODEV; | |
116 | ||
25db115b | 117 | acpi_set_device_status(device, sta); |
1da177e4 LT |
118 | |
119 | if (device->status.functional && !device->status.present) { | |
39a0ad87 ZY |
120 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " |
121 | "functional but not present;\n", | |
25db115b | 122 | device->pnp.bus_id, (u32)sta)); |
1da177e4 LT |
123 | } |
124 | ||
4be44fcd | 125 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", |
25db115b | 126 | device->pnp.bus_id, (u32)sta)); |
d550d98d | 127 | return 0; |
1da177e4 | 128 | } |
4be44fcd | 129 | EXPORT_SYMBOL(acpi_bus_get_status); |
1da177e4 | 130 | |
20733939 | 131 | void acpi_bus_private_data_handler(acpi_handle handle, |
8e4319c4 | 132 | void *context) |
20733939 ZR |
133 | { |
134 | return; | |
135 | } | |
136 | EXPORT_SYMBOL(acpi_bus_private_data_handler); | |
137 | ||
72013795 LT |
138 | int acpi_bus_attach_private_data(acpi_handle handle, void *data) |
139 | { | |
140 | acpi_status status; | |
141 | ||
142 | status = acpi_attach_data(handle, | |
143 | acpi_bus_private_data_handler, data); | |
144 | if (ACPI_FAILURE(status)) { | |
145 | acpi_handle_debug(handle, "Error attaching device data\n"); | |
146 | return -ENODEV; | |
147 | } | |
148 | ||
149 | return 0; | |
150 | } | |
151 | EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); | |
152 | ||
20733939 ZR |
153 | int acpi_bus_get_private_data(acpi_handle handle, void **data) |
154 | { | |
6a8c0af6 | 155 | acpi_status status; |
20733939 ZR |
156 | |
157 | if (!*data) | |
158 | return -EINVAL; | |
159 | ||
160 | status = acpi_get_data(handle, acpi_bus_private_data_handler, data); | |
72013795 LT |
161 | if (ACPI_FAILURE(status)) { |
162 | acpi_handle_debug(handle, "No context for object\n"); | |
20733939 ZR |
163 | return -ENODEV; |
164 | } | |
165 | ||
166 | return 0; | |
167 | } | |
72013795 LT |
168 | EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); |
169 | ||
170 | void acpi_bus_detach_private_data(acpi_handle handle) | |
171 | { | |
172 | acpi_detach_data(handle, acpi_bus_private_data_handler); | |
173 | } | |
174 | EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); | |
20733939 | 175 | |
70023de8 SL |
176 | static void acpi_print_osc_error(acpi_handle handle, |
177 | struct acpi_osc_context *context, char *error) | |
178 | { | |
179 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; | |
180 | int i; | |
181 | ||
182 | if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) | |
76c599bc | 183 | printk(KERN_DEBUG "%s: %s\n", context->uuid_str, error); |
70023de8 | 184 | else { |
76c599bc AL |
185 | printk(KERN_DEBUG "%s (%s): %s\n", |
186 | (char *)buffer.pointer, context->uuid_str, error); | |
70023de8 SL |
187 | kfree(buffer.pointer); |
188 | } | |
50fe763c | 189 | printk(KERN_DEBUG "_OSC request data:"); |
70023de8 | 190 | for (i = 0; i < context->cap.length; i += sizeof(u32)) |
50fe763c | 191 | printk(" %x", *((u32 *)(context->cap.pointer + i))); |
70023de8 SL |
192 | printk("\n"); |
193 | } | |
194 | ||
4b3db708 | 195 | acpi_status acpi_str_to_uuid(char *str, u8 *uuid) |
70023de8 SL |
196 | { |
197 | int i; | |
198 | static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, | |
199 | 24, 26, 28, 30, 32, 34}; | |
200 | ||
201 | if (strlen(str) != 36) | |
202 | return AE_BAD_PARAMETER; | |
203 | for (i = 0; i < 36; i++) { | |
204 | if (i == 8 || i == 13 || i == 18 || i == 23) { | |
205 | if (str[i] != '-') | |
206 | return AE_BAD_PARAMETER; | |
207 | } else if (!isxdigit(str[i])) | |
208 | return AE_BAD_PARAMETER; | |
209 | } | |
210 | for (i = 0; i < 16; i++) { | |
965fd9e9 AS |
211 | uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; |
212 | uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); | |
70023de8 SL |
213 | } |
214 | return AE_OK; | |
215 | } | |
4b3db708 | 216 | EXPORT_SYMBOL_GPL(acpi_str_to_uuid); |
70023de8 SL |
217 | |
218 | acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) | |
219 | { | |
220 | acpi_status status; | |
221 | struct acpi_object_list input; | |
222 | union acpi_object in_params[4]; | |
223 | union acpi_object *out_obj; | |
224 | u8 uuid[16]; | |
225 | u32 errors; | |
9dc130fc | 226 | struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
70023de8 SL |
227 | |
228 | if (!context) | |
229 | return AE_ERROR; | |
230 | if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) | |
231 | return AE_ERROR; | |
232 | context->ret.length = ACPI_ALLOCATE_BUFFER; | |
233 | context->ret.pointer = NULL; | |
234 | ||
235 | /* Setting up input parameters */ | |
236 | input.count = 4; | |
237 | input.pointer = in_params; | |
238 | in_params[0].type = ACPI_TYPE_BUFFER; | |
239 | in_params[0].buffer.length = 16; | |
240 | in_params[0].buffer.pointer = uuid; | |
241 | in_params[1].type = ACPI_TYPE_INTEGER; | |
242 | in_params[1].integer.value = context->rev; | |
243 | in_params[2].type = ACPI_TYPE_INTEGER; | |
244 | in_params[2].integer.value = context->cap.length/sizeof(u32); | |
245 | in_params[3].type = ACPI_TYPE_BUFFER; | |
246 | in_params[3].buffer.length = context->cap.length; | |
247 | in_params[3].buffer.pointer = context->cap.pointer; | |
248 | ||
9dc130fc | 249 | status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
70023de8 SL |
250 | if (ACPI_FAILURE(status)) |
251 | return status; | |
252 | ||
9dc130fc | 253 | if (!output.length) |
70023de8 SL |
254 | return AE_NULL_OBJECT; |
255 | ||
9dc130fc SL |
256 | out_obj = output.pointer; |
257 | if (out_obj->type != ACPI_TYPE_BUFFER | |
258 | || out_obj->buffer.length != context->cap.length) { | |
70023de8 SL |
259 | acpi_print_osc_error(handle, context, |
260 | "_OSC evaluation returned wrong type"); | |
261 | status = AE_TYPE; | |
262 | goto out_kfree; | |
263 | } | |
264 | /* Need to ignore the bit0 in result code */ | |
265 | errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); | |
266 | if (errors) { | |
267 | if (errors & OSC_REQUEST_ERROR) | |
268 | acpi_print_osc_error(handle, context, | |
269 | "_OSC request failed"); | |
270 | if (errors & OSC_INVALID_UUID_ERROR) | |
271 | acpi_print_osc_error(handle, context, | |
272 | "_OSC invalid UUID"); | |
273 | if (errors & OSC_INVALID_REVISION_ERROR) | |
274 | acpi_print_osc_error(handle, context, | |
275 | "_OSC invalid revision"); | |
276 | if (errors & OSC_CAPABILITIES_MASK_ERROR) { | |
b938a229 | 277 | if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
70023de8 SL |
278 | & OSC_QUERY_ENABLE) |
279 | goto out_success; | |
280 | status = AE_SUPPORT; | |
281 | goto out_kfree; | |
282 | } | |
283 | status = AE_ERROR; | |
284 | goto out_kfree; | |
285 | } | |
286 | out_success: | |
9dc130fc | 287 | context->ret.length = out_obj->buffer.length; |
e2cb5f08 AE |
288 | context->ret.pointer = kmemdup(out_obj->buffer.pointer, |
289 | context->ret.length, GFP_KERNEL); | |
9dc130fc SL |
290 | if (!context->ret.pointer) { |
291 | status = AE_NO_MEMORY; | |
292 | goto out_kfree; | |
293 | } | |
9dc130fc | 294 | status = AE_OK; |
70023de8 SL |
295 | |
296 | out_kfree: | |
9dc130fc SL |
297 | kfree(output.pointer); |
298 | if (status != AE_OK) | |
299 | context->ret.pointer = NULL; | |
70023de8 SL |
300 | return status; |
301 | } | |
302 | EXPORT_SYMBOL(acpi_run_osc); | |
303 | ||
eccddd32 | 304 | bool osc_sb_apei_support_acked; |
a36a7fec SH |
305 | |
306 | /* | |
307 | * ACPI 6.0 Section 8.4.4.2 Idle State Coordination | |
308 | * OSPM supports platform coordinated low power idle(LPI) states | |
309 | */ | |
310 | bool osc_pc_lpi_support_confirmed; | |
311 | EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); | |
312 | ||
3563ff96 SL |
313 | static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; |
314 | static void acpi_bus_osc_support(void) | |
315 | { | |
316 | u32 capbuf[2]; | |
317 | struct acpi_osc_context context = { | |
318 | .uuid_str = sb_uuid_str, | |
319 | .rev = 1, | |
320 | .cap.length = 8, | |
321 | .cap.pointer = capbuf, | |
322 | }; | |
323 | acpi_handle handle; | |
324 | ||
b938a229 BH |
325 | capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; |
326 | capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ | |
bcb2b0b2 SH |
327 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) |
328 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; | |
329 | if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) | |
330 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; | |
eccddd32 | 331 | |
b938a229 | 332 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
a36a7fec | 333 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
c2f4191a | 334 | |
eccddd32 | 335 | if (!ghes_disable) |
b938a229 | 336 | capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
3563ff96 SL |
337 | if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) |
338 | return; | |
eccddd32 HY |
339 | if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { |
340 | u32 *capbuf_ret = context.ret.pointer; | |
a36a7fec | 341 | if (context.ret.length > OSC_SUPPORT_DWORD) { |
eccddd32 | 342 | osc_sb_apei_support_acked = |
b938a229 | 343 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
a36a7fec SH |
344 | osc_pc_lpi_support_confirmed = |
345 | capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; | |
346 | } | |
3563ff96 | 347 | kfree(context.ret.pointer); |
eccddd32 HY |
348 | } |
349 | /* do we need to check other returned cap? Sounds no */ | |
3563ff96 SL |
350 | } |
351 | ||
1da177e4 LT |
352 | /* -------------------------------------------------------------------------- |
353 | Notification Handling | |
354 | -------------------------------------------------------------------------- */ | |
355 | ||
1da177e4 LT |
356 | /** |
357 | * acpi_bus_notify | |
358 | * --------------- | |
359 | * Callback for all 'system-level' device notifications (values 0x00-0x7F). | |
360 | */ | |
4be44fcd | 361 | static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
1da177e4 | 362 | { |
1a699476 | 363 | struct acpi_device *adev; |
6d278131 | 364 | struct acpi_driver *driver; |
1a699476 | 365 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
d0103387 | 366 | bool hotplug_event = false; |
02c37bd8 | 367 | |
1da177e4 | 368 | switch (type) { |
1da177e4 | 369 | case ACPI_NOTIFY_BUS_CHECK: |
1a699476 | 370 | acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); |
d0103387 | 371 | hotplug_event = true; |
1da177e4 LT |
372 | break; |
373 | ||
374 | case ACPI_NOTIFY_DEVICE_CHECK: | |
1a699476 | 375 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); |
d0103387 | 376 | hotplug_event = true; |
1da177e4 LT |
377 | break; |
378 | ||
379 | case ACPI_NOTIFY_DEVICE_WAKE: | |
1a699476 | 380 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); |
1da177e4 LT |
381 | break; |
382 | ||
383 | case ACPI_NOTIFY_EJECT_REQUEST: | |
1a699476 | 384 | acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); |
d0103387 | 385 | hotplug_event = true; |
1da177e4 LT |
386 | break; |
387 | ||
388 | case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: | |
1a699476 | 389 | acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); |
1da177e4 LT |
390 | /* TBD: Exactly what does 'light' mean? */ |
391 | break; | |
392 | ||
393 | case ACPI_NOTIFY_FREQUENCY_MISMATCH: | |
1a699476 RW |
394 | acpi_handle_err(handle, "Device cannot be configured due " |
395 | "to a frequency mismatch\n"); | |
1da177e4 LT |
396 | break; |
397 | ||
398 | case ACPI_NOTIFY_BUS_MODE_MISMATCH: | |
1a699476 RW |
399 | acpi_handle_err(handle, "Device cannot be configured due " |
400 | "to a bus mode mismatch\n"); | |
1da177e4 LT |
401 | break; |
402 | ||
403 | case ACPI_NOTIFY_POWER_FAULT: | |
1a699476 | 404 | acpi_handle_err(handle, "Device has suffered a power fault\n"); |
1da177e4 LT |
405 | break; |
406 | ||
407 | default: | |
f66abe92 RW |
408 | acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); |
409 | break; | |
1da177e4 LT |
410 | } |
411 | ||
1a699476 RW |
412 | adev = acpi_bus_get_acpi_device(handle); |
413 | if (!adev) | |
414 | goto err; | |
78ea4639 | 415 | |
1a699476 RW |
416 | driver = adev->driver; |
417 | if (driver && driver->ops.notify && | |
418 | (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) | |
419 | driver->ops.notify(adev, type); | |
420 | ||
d0103387 RW |
421 | if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
422 | return; | |
423 | ||
1a699476 RW |
424 | acpi_bus_put_acpi_device(adev); |
425 | return; | |
426 | ||
427 | err: | |
700b8422 | 428 | acpi_evaluate_ost(handle, type, ost_code, NULL); |
1da177e4 LT |
429 | } |
430 | ||
5894b0c4 RW |
431 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
432 | { | |
433 | struct acpi_device *device = data; | |
434 | ||
435 | device->driver->ops.notify(device, event); | |
436 | } | |
437 | ||
438 | static void acpi_device_notify_fixed(void *data) | |
439 | { | |
440 | struct acpi_device *device = data; | |
441 | ||
442 | /* Fixed hardware devices have no handles */ | |
443 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
444 | } | |
445 | ||
446 | static u32 acpi_device_fixed_event(void *data) | |
447 | { | |
448 | acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); | |
449 | return ACPI_INTERRUPT_HANDLED; | |
450 | } | |
451 | ||
452 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
453 | { | |
454 | acpi_status status; | |
455 | ||
456 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
457 | status = | |
458 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
459 | acpi_device_fixed_event, | |
460 | device); | |
461 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
462 | status = | |
463 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
464 | acpi_device_fixed_event, | |
465 | device); | |
466 | else | |
467 | status = acpi_install_notify_handler(device->handle, | |
468 | ACPI_DEVICE_NOTIFY, | |
469 | acpi_device_notify, | |
470 | device); | |
471 | ||
472 | if (ACPI_FAILURE(status)) | |
473 | return -EINVAL; | |
474 | return 0; | |
475 | } | |
476 | ||
477 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
478 | { | |
479 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) | |
480 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
481 | acpi_device_fixed_event); | |
482 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) | |
483 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
484 | acpi_device_fixed_event); | |
485 | else | |
486 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
487 | acpi_device_notify); | |
488 | } | |
489 | ||
68c6b148 RW |
490 | /* -------------------------------------------------------------------------- |
491 | Device Matching | |
492 | -------------------------------------------------------------------------- */ | |
493 | ||
3b95bd16 AM |
494 | /** |
495 | * acpi_get_first_physical_node - Get first physical node of an ACPI device | |
496 | * @adev: ACPI device in question | |
497 | * | |
498 | * Return: First physical node of ACPI device @adev | |
499 | */ | |
500 | struct device *acpi_get_first_physical_node(struct acpi_device *adev) | |
e91a398c RW |
501 | { |
502 | struct mutex *physical_node_lock = &adev->physical_node_lock; | |
3b95bd16 | 503 | struct device *phys_dev; |
e91a398c RW |
504 | |
505 | mutex_lock(physical_node_lock); | |
506 | if (list_empty(&adev->physical_node_list)) { | |
3b95bd16 | 507 | phys_dev = NULL; |
e91a398c RW |
508 | } else { |
509 | const struct acpi_device_physical_node *node; | |
510 | ||
511 | node = list_first_entry(&adev->physical_node_list, | |
512 | struct acpi_device_physical_node, node); | |
3b95bd16 AM |
513 | |
514 | phys_dev = node->dev; | |
e91a398c RW |
515 | } |
516 | mutex_unlock(physical_node_lock); | |
3b95bd16 AM |
517 | return phys_dev; |
518 | } | |
519 | ||
520 | static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, | |
521 | const struct device *dev) | |
522 | { | |
523 | const struct device *phys_dev = acpi_get_first_physical_node(adev); | |
524 | ||
525 | return phys_dev && phys_dev == dev ? adev : NULL; | |
e91a398c RW |
526 | } |
527 | ||
3431e490 RW |
528 | /** |
529 | * acpi_device_is_first_physical_node - Is given dev first physical node | |
530 | * @adev: ACPI companion device | |
531 | * @dev: Physical device to check | |
532 | * | |
533 | * Function checks if given @dev is the first physical devices attached to | |
534 | * the ACPI companion device. This distinction is needed in some cases | |
535 | * where the same companion device is shared between many physical devices. | |
536 | * | |
537 | * Note that the caller have to provide valid @adev pointer. | |
538 | */ | |
539 | bool acpi_device_is_first_physical_node(struct acpi_device *adev, | |
540 | const struct device *dev) | |
541 | { | |
e91a398c | 542 | return !!acpi_primary_dev_companion(adev, dev); |
3431e490 RW |
543 | } |
544 | ||
68c6b148 RW |
545 | /* |
546 | * acpi_companion_match() - Can we match via ACPI companion device | |
547 | * @dev: Device in question | |
548 | * | |
549 | * Check if the given device has an ACPI companion and if that companion has | |
550 | * a valid list of PNP IDs, and if the device is the first (primary) physical | |
551 | * device associated with it. Return the companion pointer if that's the case | |
552 | * or NULL otherwise. | |
553 | * | |
554 | * If multiple physical devices are attached to a single ACPI companion, we need | |
555 | * to be careful. The usage scenario for this kind of relationship is that all | |
556 | * of the physical devices in question use resources provided by the ACPI | |
557 | * companion. A typical case is an MFD device where all the sub-devices share | |
558 | * the parent's ACPI companion. In such cases we can only allow the primary | |
559 | * (first) physical device to be matched with the help of the companion's PNP | |
560 | * IDs. | |
561 | * | |
562 | * Additional physical devices sharing the ACPI companion can still use | |
563 | * resources available from it but they will be matched normally using functions | |
564 | * provided by their bus types (and analogously for their modalias). | |
565 | */ | |
566 | struct acpi_device *acpi_companion_match(const struct device *dev) | |
567 | { | |
568 | struct acpi_device *adev; | |
68c6b148 RW |
569 | |
570 | adev = ACPI_COMPANION(dev); | |
571 | if (!adev) | |
572 | return NULL; | |
573 | ||
574 | if (list_empty(&adev->pnp.ids)) | |
575 | return NULL; | |
576 | ||
e91a398c | 577 | return acpi_primary_dev_companion(adev, dev); |
68c6b148 RW |
578 | } |
579 | ||
580 | /** | |
581 | * acpi_of_match_device - Match device object using the "compatible" property. | |
582 | * @adev: ACPI device object to match. | |
583 | * @of_match_table: List of device IDs to match against. | |
584 | * | |
585 | * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of | |
586 | * identifiers and a _DSD object with the "compatible" property, use that | |
587 | * property to match against the given list of identifiers. | |
588 | */ | |
589 | static bool acpi_of_match_device(struct acpi_device *adev, | |
590 | const struct of_device_id *of_match_table) | |
591 | { | |
592 | const union acpi_object *of_compatible, *obj; | |
593 | int i, nval; | |
594 | ||
595 | if (!adev) | |
596 | return false; | |
597 | ||
598 | of_compatible = adev->data.of_compatible; | |
599 | if (!of_match_table || !of_compatible) | |
600 | return false; | |
601 | ||
602 | if (of_compatible->type == ACPI_TYPE_PACKAGE) { | |
603 | nval = of_compatible->package.count; | |
604 | obj = of_compatible->package.elements; | |
605 | } else { /* Must be ACPI_TYPE_STRING. */ | |
606 | nval = 1; | |
607 | obj = of_compatible; | |
608 | } | |
609 | /* Now we can look for the driver DT compatible strings */ | |
610 | for (i = 0; i < nval; i++, obj++) { | |
611 | const struct of_device_id *id; | |
612 | ||
613 | for (id = of_match_table; id->compatible[0]; id++) | |
614 | if (!strcasecmp(obj->string.pointer, id->compatible)) | |
615 | return true; | |
616 | } | |
617 | ||
618 | return false; | |
619 | } | |
620 | ||
621 | static bool __acpi_match_device_cls(const struct acpi_device_id *id, | |
622 | struct acpi_hardware_id *hwid) | |
623 | { | |
624 | int i, msk, byte_shift; | |
625 | char buf[3]; | |
626 | ||
627 | if (!id->cls) | |
628 | return false; | |
629 | ||
630 | /* Apply class-code bitmask, before checking each class-code byte */ | |
631 | for (i = 1; i <= 3; i++) { | |
632 | byte_shift = 8 * (3 - i); | |
633 | msk = (id->cls_msk >> byte_shift) & 0xFF; | |
634 | if (!msk) | |
635 | continue; | |
636 | ||
637 | sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); | |
638 | if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) | |
639 | return false; | |
640 | } | |
641 | return true; | |
642 | } | |
643 | ||
644 | static const struct acpi_device_id *__acpi_match_device( | |
645 | struct acpi_device *device, | |
646 | const struct acpi_device_id *ids, | |
647 | const struct of_device_id *of_ids) | |
648 | { | |
649 | const struct acpi_device_id *id; | |
650 | struct acpi_hardware_id *hwid; | |
651 | ||
652 | /* | |
653 | * If the device is not present, it is unnecessary to load device | |
654 | * driver for it. | |
655 | */ | |
656 | if (!device || !device->status.present) | |
657 | return NULL; | |
658 | ||
659 | list_for_each_entry(hwid, &device->pnp.ids, list) { | |
660 | /* First, check the ACPI/PNP IDs provided by the caller. */ | |
661 | for (id = ids; id->id[0] || id->cls; id++) { | |
662 | if (id->id[0] && !strcmp((char *) id->id, hwid->id)) | |
663 | return id; | |
664 | else if (id->cls && __acpi_match_device_cls(id, hwid)) | |
665 | return id; | |
666 | } | |
667 | ||
668 | /* | |
669 | * Next, check ACPI_DT_NAMESPACE_HID and try to match the | |
670 | * "compatible" property if found. | |
671 | * | |
672 | * The id returned by the below is not valid, but the only | |
673 | * caller passing non-NULL of_ids here is only interested in | |
674 | * whether or not the return value is NULL. | |
675 | */ | |
676 | if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) | |
677 | && acpi_of_match_device(device, of_ids)) | |
678 | return id; | |
679 | } | |
680 | return NULL; | |
681 | } | |
682 | ||
683 | /** | |
684 | * acpi_match_device - Match a struct device against a given list of ACPI IDs | |
685 | * @ids: Array of struct acpi_device_id object to match against. | |
686 | * @dev: The device structure to match. | |
687 | * | |
688 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device | |
689 | * object for that handle and use that object to match against a given list of | |
690 | * device IDs. | |
691 | * | |
692 | * Return a pointer to the first matching ID on success or %NULL on failure. | |
693 | */ | |
694 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, | |
695 | const struct device *dev) | |
696 | { | |
697 | return __acpi_match_device(acpi_companion_match(dev), ids, NULL); | |
698 | } | |
699 | EXPORT_SYMBOL_GPL(acpi_match_device); | |
700 | ||
701 | int acpi_match_device_ids(struct acpi_device *device, | |
702 | const struct acpi_device_id *ids) | |
703 | { | |
704 | return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; | |
705 | } | |
706 | EXPORT_SYMBOL(acpi_match_device_ids); | |
707 | ||
708 | bool acpi_driver_match_device(struct device *dev, | |
709 | const struct device_driver *drv) | |
710 | { | |
711 | if (!drv->acpi_match_table) | |
712 | return acpi_of_match_device(ACPI_COMPANION(dev), | |
713 | drv->of_match_table); | |
714 | ||
715 | return !!__acpi_match_device(acpi_companion_match(dev), | |
716 | drv->acpi_match_table, drv->of_match_table); | |
717 | } | |
718 | EXPORT_SYMBOL_GPL(acpi_driver_match_device); | |
719 | ||
5894b0c4 RW |
720 | /* -------------------------------------------------------------------------- |
721 | ACPI Driver Management | |
722 | -------------------------------------------------------------------------- */ | |
723 | ||
724 | /** | |
725 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
726 | * @driver: driver being registered | |
727 | * | |
728 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
729 | * devices that match the driver's criteria and binds. Returns zero for | |
730 | * success or a negative error status for failure. | |
731 | */ | |
732 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
733 | { | |
734 | int ret; | |
735 | ||
736 | if (acpi_disabled) | |
737 | return -ENODEV; | |
738 | driver->drv.name = driver->name; | |
739 | driver->drv.bus = &acpi_bus_type; | |
740 | driver->drv.owner = driver->owner; | |
741 | ||
742 | ret = driver_register(&driver->drv); | |
743 | return ret; | |
744 | } | |
745 | ||
746 | EXPORT_SYMBOL(acpi_bus_register_driver); | |
747 | ||
748 | /** | |
749 | * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus | |
750 | * @driver: driver to unregister | |
751 | * | |
752 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
753 | * devices that match the driver's criteria and unbinds. | |
754 | */ | |
755 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
756 | { | |
757 | driver_unregister(&driver->drv); | |
758 | } | |
759 | ||
760 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
761 | ||
762 | /* -------------------------------------------------------------------------- | |
763 | ACPI Bus operations | |
764 | -------------------------------------------------------------------------- */ | |
765 | ||
766 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) | |
767 | { | |
768 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
769 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
770 | ||
771 | return acpi_dev->flags.match_driver | |
772 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); | |
773 | } | |
774 | ||
775 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
776 | { | |
777 | return __acpi_device_uevent_modalias(to_acpi_device(dev), env); | |
778 | } | |
779 | ||
780 | static int acpi_device_probe(struct device *dev) | |
781 | { | |
782 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
783 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
784 | int ret; | |
785 | ||
786 | if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) | |
787 | return -EINVAL; | |
788 | ||
789 | if (!acpi_drv->ops.add) | |
790 | return -ENOSYS; | |
791 | ||
792 | ret = acpi_drv->ops.add(acpi_dev); | |
793 | if (ret) | |
794 | return ret; | |
795 | ||
796 | acpi_dev->driver = acpi_drv; | |
797 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
798 | "Driver [%s] successfully bound to device [%s]\n", | |
799 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
800 | ||
801 | if (acpi_drv->ops.notify) { | |
802 | ret = acpi_device_install_notify_handler(acpi_dev); | |
803 | if (ret) { | |
804 | if (acpi_drv->ops.remove) | |
805 | acpi_drv->ops.remove(acpi_dev); | |
806 | ||
807 | acpi_dev->driver = NULL; | |
808 | acpi_dev->driver_data = NULL; | |
809 | return ret; | |
810 | } | |
811 | } | |
812 | ||
813 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", | |
814 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
815 | get_device(dev); | |
816 | return 0; | |
817 | } | |
818 | ||
819 | static int acpi_device_remove(struct device * dev) | |
820 | { | |
821 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
822 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
823 | ||
824 | if (acpi_drv) { | |
825 | if (acpi_drv->ops.notify) | |
826 | acpi_device_remove_notify_handler(acpi_dev); | |
827 | if (acpi_drv->ops.remove) | |
828 | acpi_drv->ops.remove(acpi_dev); | |
829 | } | |
830 | acpi_dev->driver = NULL; | |
831 | acpi_dev->driver_data = NULL; | |
832 | ||
833 | put_device(dev); | |
834 | return 0; | |
835 | } | |
836 | ||
837 | struct bus_type acpi_bus_type = { | |
838 | .name = "acpi", | |
839 | .match = acpi_bus_match, | |
840 | .probe = acpi_device_probe, | |
841 | .remove = acpi_device_remove, | |
842 | .uevent = acpi_device_uevent, | |
843 | }; | |
844 | ||
1da177e4 LT |
845 | /* -------------------------------------------------------------------------- |
846 | Initialization/Cleanup | |
847 | -------------------------------------------------------------------------- */ | |
848 | ||
4be44fcd | 849 | static int __init acpi_bus_init_irq(void) |
1da177e4 | 850 | { |
6a8c0af6 | 851 | acpi_status status; |
4be44fcd | 852 | char *message = NULL; |
1da177e4 | 853 | |
1da177e4 | 854 | |
aafbcd16 | 855 | /* |
1da177e4 LT |
856 | * Let the system know what interrupt model we are using by |
857 | * evaluating the \_PIC object, if exists. | |
858 | */ | |
859 | ||
860 | switch (acpi_irq_model) { | |
861 | case ACPI_IRQ_MODEL_PIC: | |
862 | message = "PIC"; | |
863 | break; | |
864 | case ACPI_IRQ_MODEL_IOAPIC: | |
865 | message = "IOAPIC"; | |
866 | break; | |
867 | case ACPI_IRQ_MODEL_IOSAPIC: | |
868 | message = "IOSAPIC"; | |
869 | break; | |
fbe61ec7 HG |
870 | case ACPI_IRQ_MODEL_GIC: |
871 | message = "GIC"; | |
872 | break; | |
3948ec94 JK |
873 | case ACPI_IRQ_MODEL_PLATFORM: |
874 | message = "platform specific model"; | |
875 | break; | |
1da177e4 LT |
876 | default: |
877 | printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); | |
d550d98d | 878 | return -ENODEV; |
1da177e4 LT |
879 | } |
880 | ||
881 | printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); | |
882 | ||
0db98202 | 883 | status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4 | 884 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc6720 | 885 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d | 886 | return -ENODEV; |
1da177e4 LT |
887 | } |
888 | ||
d550d98d | 889 | return 0; |
1da177e4 LT |
890 | } |
891 | ||
b064a8fa RW |
892 | /** |
893 | * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. | |
894 | * | |
895 | * The ACPI tables are accessible after this, but the handling of events has not | |
896 | * been initialized and the global lock is not available yet, so AML should not | |
897 | * be executed at this point. | |
898 | * | |
899 | * Doing this before switching the EFI runtime services to virtual mode allows | |
900 | * the EfiBootServices memory to be freed slightly earlier on boot. | |
901 | */ | |
4be44fcd | 902 | void __init acpi_early_init(void) |
1da177e4 | 903 | { |
6a8c0af6 | 904 | acpi_status status; |
1da177e4 LT |
905 | |
906 | if (acpi_disabled) | |
d550d98d | 907 | return; |
1da177e4 | 908 | |
61686124 BM |
909 | printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); |
910 | ||
4fc0a7e8 LZ |
911 | /* It's safe to verify table checksums during late stage */ |
912 | acpi_gbl_verify_table_checksum = TRUE; | |
913 | ||
1da177e4 LT |
914 | /* enable workarounds, unless strict ACPI spec. compliance */ |
915 | if (!acpi_strict) | |
916 | acpi_gbl_enable_interpreter_slack = TRUE; | |
917 | ||
ad71860a AS |
918 | acpi_gbl_permanent_mmap = 1; |
919 | ||
aa2110cb LM |
920 | /* |
921 | * If the machine falls into the DMI check table, | |
922 | * DSDT will be copied to memory | |
923 | */ | |
924 | dmi_check_system(dsdt_dmi_table); | |
925 | ||
ad71860a AS |
926 | status = acpi_reallocate_root_table(); |
927 | if (ACPI_FAILURE(status)) { | |
928 | printk(KERN_ERR PREFIX | |
929 | "Unable to reallocate ACPI tables\n"); | |
930 | goto error0; | |
931 | } | |
932 | ||
1da177e4 LT |
933 | status = acpi_initialize_subsystem(); |
934 | if (ACPI_FAILURE(status)) { | |
4be44fcd LB |
935 | printk(KERN_ERR PREFIX |
936 | "Unable to initialize the ACPI Interpreter\n"); | |
1da177e4 LT |
937 | goto error0; |
938 | } | |
939 | ||
fe6cbea0 LZ |
940 | if (acpi_gbl_group_module_level_code) { |
941 | status = acpi_load_tables(); | |
942 | if (ACPI_FAILURE(status)) { | |
943 | printk(KERN_ERR PREFIX | |
944 | "Unable to load the System Description Tables\n"); | |
945 | goto error0; | |
946 | } | |
1da177e4 LT |
947 | } |
948 | ||
1da177e4 LT |
949 | #ifdef CONFIG_X86 |
950 | if (!acpi_ioapic) { | |
1da177e4 | 951 | /* compatible (0) means level (3) */ |
5f3b1a8b AS |
952 | if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { |
953 | acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; | |
954 | acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; | |
955 | } | |
1da177e4 | 956 | /* Set PIC-mode SCI trigger type */ |
cee324b1 | 957 | acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b | 958 | (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4 | 959 | } else { |
1da177e4 | 960 | /* |
cee324b1 | 961 | * now that acpi_gbl_FADT is initialized, |
1da177e4 LT |
962 | * update it with result from INT_SRC_OVR parsing |
963 | */ | |
cee324b1 | 964 | acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4 LT |
965 | } |
966 | #endif | |
b064a8fa RW |
967 | return; |
968 | ||
969 | error0: | |
970 | disable_acpi(); | |
971 | } | |
972 | ||
973 | /** | |
974 | * acpi_subsystem_init - Finalize the early initialization of ACPI. | |
975 | * | |
976 | * Switch over the platform to the ACPI mode (if possible), initialize the | |
977 | * handling of ACPI events, install the interrupt and global lock handlers. | |
978 | * | |
979 | * Doing this too early is generally unsafe, but at the same time it needs to be | |
980 | * done before all things that really depend on ACPI. The right spot appears to | |
981 | * be before finalizing the EFI initialization. | |
982 | */ | |
983 | void __init acpi_subsystem_init(void) | |
984 | { | |
985 | acpi_status status; | |
986 | ||
987 | if (acpi_disabled) | |
988 | return; | |
1da177e4 | 989 | |
4505a201 | 990 | status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4 LT |
991 | if (ACPI_FAILURE(status)) { |
992 | printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); | |
b064a8fa RW |
993 | disable_acpi(); |
994 | } else { | |
995 | /* | |
996 | * If the system is using ACPI then we can be reasonably | |
997 | * confident that any regulators are managed by the firmware | |
998 | * so tell the regulator core it has everything it needs to | |
999 | * know. | |
1000 | */ | |
1001 | regulator_has_full_constraints(); | |
1da177e4 | 1002 | } |
1da177e4 LT |
1003 | } |
1004 | ||
4be44fcd | 1005 | static int __init acpi_bus_init(void) |
1da177e4 | 1006 | { |
6a8c0af6 BH |
1007 | int result; |
1008 | acpi_status status; | |
1da177e4 | 1009 | |
176f9c18 | 1010 | acpi_os_initialize1(); |
1da177e4 | 1011 | |
1da177e4 LT |
1012 | /* |
1013 | * ACPI 2.0 requires the EC driver to be loaded and work before | |
fe6cbea0 LZ |
1014 | * the EC device is found in the namespace (i.e. before |
1015 | * acpi_load_tables() is called). | |
1da177e4 | 1016 | * |
aafbcd16 | 1017 | * This is accomplished by looking for the ECDT table, and getting |
1da177e4 LT |
1018 | * the EC parameters out of that. |
1019 | */ | |
1020 | status = acpi_ec_ecdt_probe(); | |
1021 | /* Ignore result. Not having an ECDT is not fatal. */ | |
1da177e4 | 1022 | |
fe6cbea0 LZ |
1023 | if (!acpi_gbl_group_module_level_code) { |
1024 | status = acpi_load_tables(); | |
1025 | if (ACPI_FAILURE(status)) { | |
1026 | printk(KERN_ERR PREFIX | |
1027 | "Unable to load the System Description Tables\n"); | |
1028 | goto error1; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); | |
1033 | if (ACPI_FAILURE(status)) { | |
1034 | printk(KERN_ERR PREFIX | |
1035 | "Unable to start the ACPI Interpreter\n"); | |
1036 | goto error1; | |
1037 | } | |
1038 | ||
1da177e4 LT |
1039 | status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); |
1040 | if (ACPI_FAILURE(status)) { | |
1041 | printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); | |
1042 | goto error1; | |
1043 | } | |
1044 | ||
a2121167 SP |
1045 | /* Set capability bits for _OSC under processor scope */ |
1046 | acpi_early_processor_osc(); | |
1047 | ||
fc54ab72 LM |
1048 | /* |
1049 | * _OSC method may exist in module level code, | |
1050 | * so it must be run after ACPI_FULL_INITIALIZATION | |
1051 | */ | |
1052 | acpi_bus_osc_support(); | |
1053 | ||
b1d248d9 ZR |
1054 | /* |
1055 | * _PDC control method may load dynamic SSDT tables, | |
1056 | * and we need to install the table handler before that. | |
1057 | */ | |
1058 | acpi_sysfs_init(); | |
1059 | ||
78f16996 AC |
1060 | acpi_early_processor_set_pdc(); |
1061 | ||
455c8793 ZY |
1062 | /* |
1063 | * Maybe EC region is required at bus_scan/acpi_get_devices. So it | |
1064 | * is necessary to enable it as early as possible. | |
1065 | */ | |
dcf15cbd | 1066 | acpi_ec_dsdt_probe(); |
455c8793 | 1067 | |
1da177e4 LT |
1068 | printk(KERN_INFO PREFIX "Interpreter enabled\n"); |
1069 | ||
aafbcd16 AS |
1070 | /* Initialize sleep structures */ |
1071 | acpi_sleep_init(); | |
1072 | ||
1da177e4 LT |
1073 | /* |
1074 | * Get the system interrupt model and evaluate \_PIC. | |
1075 | */ | |
1076 | result = acpi_bus_init_irq(); | |
1077 | if (result) | |
1078 | goto error1; | |
1079 | ||
1080 | /* | |
1081 | * Register the for all standard device notifications. | |
1082 | */ | |
4be44fcd LB |
1083 | status = |
1084 | acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, | |
1085 | &acpi_bus_notify, NULL); | |
1da177e4 | 1086 | if (ACPI_FAILURE(status)) { |
4be44fcd LB |
1087 | printk(KERN_ERR PREFIX |
1088 | "Unable to register for device notifications\n"); | |
1da177e4 LT |
1089 | goto error1; |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Create the top ACPI proc directory | |
1094 | */ | |
1095 | acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); | |
1096 | ||
1dcc3d33 RW |
1097 | result = bus_register(&acpi_bus_type); |
1098 | if (!result) | |
1099 | return 0; | |
1da177e4 LT |
1100 | |
1101 | /* Mimic structured exception handling */ | |
4be44fcd | 1102 | error1: |
1da177e4 | 1103 | acpi_terminate(); |
d550d98d | 1104 | return -ENODEV; |
1da177e4 LT |
1105 | } |
1106 | ||
99e0d2fc | 1107 | struct kobject *acpi_kobj; |
f2d4753f | 1108 | EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4 | 1109 | |
4be44fcd | 1110 | static int __init acpi_init(void) |
1da177e4 | 1111 | { |
6831c6ed | 1112 | int result; |
1da177e4 | 1113 | |
1da177e4 LT |
1114 | if (acpi_disabled) { |
1115 | printk(KERN_INFO PREFIX "Interpreter disabled.\n"); | |
d550d98d | 1116 | return -ENODEV; |
1da177e4 LT |
1117 | } |
1118 | ||
f62ed9e3 | 1119 | acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc | 1120 | if (!acpi_kobj) { |
96b2dd1f | 1121 | printk(KERN_WARNING "%s: kset create error\n", __func__); |
99e0d2fc GKH |
1122 | acpi_kobj = NULL; |
1123 | } | |
1da177e4 | 1124 | |
0e46517d | 1125 | init_acpi_device_notify(); |
1da177e4 | 1126 | result = acpi_bus_init(); |
6831c6ed | 1127 | if (result) { |
1da177e4 | 1128 | disable_acpi(); |
81d0273d | 1129 | return result; |
6831c6ed | 1130 | } |
81d0273d | 1131 | |
6831c6ed | 1132 | pci_mmcfg_late_init(); |
e747f274 | 1133 | acpi_scan_init(); |
a5f820fe | 1134 | acpi_ec_init(); |
a25ee920 | 1135 | acpi_debugfs_init(); |
9cee43e0 | 1136 | acpi_sleep_proc_init(); |
201b8c65 | 1137 | acpi_wakeup_device_init(); |
836d0830 | 1138 | acpi_debugger_init(); |
6831c6ed | 1139 | return 0; |
1da177e4 LT |
1140 | } |
1141 | ||
1142 | subsys_initcall(acpi_init); |